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code / git / 7c5cea7242b5c01fdfe006441e5c0b480603f966 / . / revision.c
blob: 0e39b2b8a59e7ab47d729602aa9bf2231691d133 [file] [log] [blame]
#include "cache.h"
#include "object-store.h"
#include "tag.h"
#include "blob.h"
#include "tree.h"
#include "commit.h"
#include "diff.h"
#include "refs.h"
#include "revision.h"
#include "repository.h"
#include "graph.h"
#include "grep.h"
#include "reflog-walk.h"
#include "patch-ids.h"
#include "decorate.h"
#include "log-tree.h"
#include "string-list.h"
#include "line-log.h"
#include "mailmap.h"
#include "commit-slab.h"
#include "dir.h"
#include "cache-tree.h"
#include "bisect.h"
#include "packfile.h"
#include "worktree.h"
#include "argv-array.h"
#include "commit-reach.h"
#include "commit-graph.h"
#include "prio-queue.h"
#include "hashmap.h"
#include "utf8.h"
volatile show_early_output_fn_t show_early_output;
static const char *term_bad;
static const char *term_good;
implement_shared_commit_slab(revision_sources, char *);
void show_object_with_name(FILE *out, struct object *obj, const char *name)
{
const char *p;
fprintf(out, "%s ", oid_to_hex(&obj->oid));
for (p = name; *p && *p != '\n'; p++)
fputc(*p, out);
fputc('\n', out);
}
static void mark_blob_uninteresting(struct blob *blob)
{
if (!blob)
return;
if (blob->object.flags & UNINTERESTING)
return;
blob->object.flags |= UNINTERESTING;
}
static void mark_tree_contents_uninteresting(struct repository *r,
struct tree *tree)
{
struct tree_desc desc;
struct name_entry entry;
if (parse_tree_gently(tree, 1) < 0)
return;
init_tree_desc(&desc, tree->buffer, tree->size);
while (tree_entry(&desc, &entry)) {
switch (object_type(entry.mode)) {
case OBJ_TREE:
mark_tree_uninteresting(r, lookup_tree(r, &entry.oid));
break;
case OBJ_BLOB:
mark_blob_uninteresting(lookup_blob(r, &entry.oid));
break;
default:
/* Subproject commit - not in this repository */
break;
}
}
/*
* We don't care about the tree any more
* after it has been marked uninteresting.
*/
free_tree_buffer(tree);
}
void mark_tree_uninteresting(struct repository *r, struct tree *tree)
{
struct object *obj;
if (!tree)
return;
obj = &tree->object;
if (obj->flags & UNINTERESTING)
return;
obj->flags |= UNINTERESTING;
mark_tree_contents_uninteresting(r, tree);
}
struct path_and_oids_entry {
struct hashmap_entry ent;
char *path;
struct oidset trees;
};
static int path_and_oids_cmp(const void *hashmap_cmp_fn_data,
const struct hashmap_entry *eptr,
const struct hashmap_entry *entry_or_key,
const void *keydata)
{
const struct path_and_oids_entry *e1, *e2;
e1 = container_of(eptr, const struct path_and_oids_entry, ent);
e2 = container_of(entry_or_key, const struct path_and_oids_entry, ent);
return strcmp(e1->path, e2->path);
}
static void paths_and_oids_init(struct hashmap *map)
{
hashmap_init(map, path_and_oids_cmp, NULL, 0);
}
static void paths_and_oids_clear(struct hashmap *map)
{
struct hashmap_iter iter;
struct path_and_oids_entry *entry;
hashmap_for_each_entry(map, &iter, entry, ent /* member name */) {
oidset_clear(&entry->trees);
free(entry->path);
}
hashmap_free_entries(map, struct path_and_oids_entry, ent);
}
static void paths_and_oids_insert(struct hashmap *map,
const char *path,
const struct object_id *oid)
{
int hash = strhash(path);
struct path_and_oids_entry key;
struct path_and_oids_entry *entry;
hashmap_entry_init(&key.ent, hash);
/* use a shallow copy for the lookup */
key.path = (char *)path;
oidset_init(&key.trees, 0);
entry = hashmap_get_entry(map, &key, ent, NULL);
if (!entry) {
entry = xcalloc(1, sizeof(struct path_and_oids_entry));
hashmap_entry_init(&entry->ent, hash);
entry->path = xstrdup(key.path);
oidset_init(&entry->trees, 16);
hashmap_put(map, &entry->ent);
}
oidset_insert(&entry->trees, oid);
}
static void add_children_by_path(struct repository *r,
struct tree *tree,
struct hashmap *map)
{
struct tree_desc desc;
struct name_entry entry;
if (!tree)
return;
if (parse_tree_gently(tree, 1) < 0)
return;
init_tree_desc(&desc, tree->buffer, tree->size);
while (tree_entry(&desc, &entry)) {
switch (object_type(entry.mode)) {
case OBJ_TREE:
paths_and_oids_insert(map, entry.path, &entry.oid);
if (tree->object.flags & UNINTERESTING) {
struct tree *child = lookup_tree(r, &entry.oid);
if (child)
child->object.flags |= UNINTERESTING;
}
break;
case OBJ_BLOB:
if (tree->object.flags & UNINTERESTING) {
struct blob *child = lookup_blob(r, &entry.oid);
if (child)
child->object.flags |= UNINTERESTING;
}
break;
default:
/* Subproject commit - not in this repository */
break;
}
}
free_tree_buffer(tree);
}
void mark_trees_uninteresting_sparse(struct repository *r,
struct oidset *trees)
{
unsigned has_interesting = 0, has_uninteresting = 0;
struct hashmap map;
struct hashmap_iter map_iter;
struct path_and_oids_entry *entry;
struct object_id *oid;
struct oidset_iter iter;
oidset_iter_init(trees, &iter);
while ((!has_interesting || !has_uninteresting) &&
(oid = oidset_iter_next(&iter))) {
struct tree *tree = lookup_tree(r, oid);
if (!tree)
continue;
if (tree->object.flags & UNINTERESTING)
has_uninteresting = 1;
else
has_interesting = 1;
}
/* Do not walk unless we have both types of trees. */
if (!has_uninteresting || !has_interesting)
return;
paths_and_oids_init(&map);
oidset_iter_init(trees, &iter);
while ((oid = oidset_iter_next(&iter))) {
struct tree *tree = lookup_tree(r, oid);
add_children_by_path(r, tree, &map);
}
hashmap_for_each_entry(&map, &map_iter, entry, ent /* member name */)
mark_trees_uninteresting_sparse(r, &entry->trees);
paths_and_oids_clear(&map);
}
struct commit_stack {
struct commit **items;
size_t nr, alloc;
};
#define COMMIT_STACK_INIT { NULL, 0, 0 }
static void commit_stack_push(struct commit_stack *stack, struct commit *commit)
{
ALLOC_GROW(stack->items, stack->nr + 1, stack->alloc);
stack->items[stack->nr++] = commit;
}
static struct commit *commit_stack_pop(struct commit_stack *stack)
{
return stack->nr ? stack->items[--stack->nr] : NULL;
}
static void commit_stack_clear(struct commit_stack *stack)
{
FREE_AND_NULL(stack->items);
stack->nr = stack->alloc = 0;
}
static void mark_one_parent_uninteresting(struct commit *commit,
struct commit_stack *pending)
{
struct commit_list *l;
if (commit->object.flags & UNINTERESTING)
return;
commit->object.flags |= UNINTERESTING;
/*
* Normally we haven't parsed the parent
* yet, so we won't have a parent of a parent
* here. However, it may turn out that we've
* reached this commit some other way (where it
* wasn't uninteresting), in which case we need
* to mark its parents recursively too..
*/
for (l = commit->parents; l; l = l->next)
commit_stack_push(pending, l->item);
}
void mark_parents_uninteresting(struct commit *commit)
{
struct commit_stack pending = COMMIT_STACK_INIT;
struct commit_list *l;
for (l = commit->parents; l; l = l->next)
mark_one_parent_uninteresting(l->item, &pending);
while (pending.nr > 0)
mark_one_parent_uninteresting(commit_stack_pop(&pending),
&pending);
commit_stack_clear(&pending);
}
static void add_pending_object_with_path(struct rev_info *revs,
struct object *obj,
const char *name, unsigned mode,
const char *path)
{
if (!obj)
return;
if (revs->no_walk && (obj->flags & UNINTERESTING))
revs->no_walk = 0;
if (revs->reflog_info && obj->type == OBJ_COMMIT) {
struct strbuf buf = STRBUF_INIT;
int len = interpret_branch_name(name, 0, &buf, 0);
if (0 < len && name[len] && buf.len)
strbuf_addstr(&buf, name + len);
add_reflog_for_walk(revs->reflog_info,
(struct commit *)obj,
buf.buf[0] ? buf.buf: name);
strbuf_release(&buf);
return; /* do not add the commit itself */
}
add_object_array_with_path(obj, name, &revs->pending, mode, path);
}
static void add_pending_object_with_mode(struct rev_info *revs,
struct object *obj,
const char *name, unsigned mode)
{
add_pending_object_with_path(revs, obj, name, mode, NULL);
}
void add_pending_object(struct rev_info *revs,
struct object *obj, const char *name)
{
add_pending_object_with_mode(revs, obj, name, S_IFINVALID);
}
void add_head_to_pending(struct rev_info *revs)
{
struct object_id oid;
struct object *obj;
if (get_oid("HEAD", &oid))
return;
obj = parse_object(revs->repo, &oid);
if (!obj)
return;
add_pending_object(revs, obj, "HEAD");
}
static struct object *get_reference(struct rev_info *revs, const char *name,
const struct object_id *oid,
unsigned int flags)
{
struct object *object;
/*
* If the repository has commit graphs, repo_parse_commit() avoids
* reading the object buffer, so use it whenever possible.
*/
if (oid_object_info(revs->repo, oid, NULL) == OBJ_COMMIT) {
struct commit *c = lookup_commit(revs->repo, oid);
if (!repo_parse_commit(revs->repo, c))
object = (struct object *) c;
else
object = NULL;
} else {
object = parse_object(revs->repo, oid);
}
if (!object) {
if (revs->ignore_missing)
return object;
if (revs->exclude_promisor_objects && is_promisor_object(oid))
return NULL;
die("bad object %s", name);
}
object->flags |= flags;
return object;
}
void add_pending_oid(struct rev_info *revs, const char *name,
const struct object_id *oid, unsigned int flags)
{
struct object *object = get_reference(revs, name, oid, flags);
add_pending_object(revs, object, name);
}
static struct commit *handle_commit(struct rev_info *revs,
struct object_array_entry *entry)
{
struct object *object = entry->item;
const char *name = entry->name;
const char *path = entry->path;
unsigned int mode = entry->mode;
unsigned long flags = object->flags;
/*
* Tag object? Look what it points to..
*/
while (object->type == OBJ_TAG) {
struct tag *tag = (struct tag *) object;
if (revs->tag_objects && !(flags & UNINTERESTING))
add_pending_object(revs, object, tag->tag);
object = parse_object(revs->repo, get_tagged_oid(tag));
if (!object) {
if (revs->ignore_missing_links || (flags & UNINTERESTING))
return NULL;
if (revs->exclude_promisor_objects &&
is_promisor_object(&tag->tagged->oid))
return NULL;
die("bad object %s", oid_to_hex(&tag->tagged->oid));
}
object->flags |= flags;
/*
* We'll handle the tagged object by looping or dropping
* through to the non-tag handlers below. Do not
* propagate path data from the tag's pending entry.
*/
path = NULL;
mode = 0;
}
/*
* Commit object? Just return it, we'll do all the complex
* reachability crud.
*/
if (object->type == OBJ_COMMIT) {
struct commit *commit = (struct commit *)object;
if (parse_commit(commit) < 0)
die("unable to parse commit %s", name);
if (flags & UNINTERESTING) {
mark_parents_uninteresting(commit);
if (!revs->topo_order || !generation_numbers_enabled(the_repository))
revs->limited = 1;
}
if (revs->sources) {
char **slot = revision_sources_at(revs->sources, commit);
if (!*slot)
*slot = xstrdup(name);
}
return commit;
}
/*
* Tree object? Either mark it uninteresting, or add it
* to the list of objects to look at later..
*/
if (object->type == OBJ_TREE) {
struct tree *tree = (struct tree *)object;
if (!revs->tree_objects)
return NULL;
if (flags & UNINTERESTING) {
mark_tree_contents_uninteresting(revs->repo, tree);
return NULL;
}
add_pending_object_with_path(revs, object, name, mode, path);
return NULL;
}
/*
* Blob object? You know the drill by now..
*/
if (object->type == OBJ_BLOB) {
if (!revs->blob_objects)
return NULL;
if (flags & UNINTERESTING)
return NULL;
add_pending_object_with_path(revs, object, name, mode, path);
return NULL;
}
die("%s is unknown object", name);
}
static int everybody_uninteresting(struct commit_list *orig,
struct commit **interesting_cache)
{
struct commit_list *list = orig;
if (*interesting_cache) {
struct commit *commit = *interesting_cache;
if (!(commit->object.flags & UNINTERESTING))
return 0;
}
while (list) {
struct commit *commit = list->item;
list = list->next;
if (commit->object.flags & UNINTERESTING)
continue;
*interesting_cache = commit;
return 0;
}
return 1;
}
/*
* A definition of "relevant" commit that we can use to simplify limited graphs
* by eliminating side branches.
*
* A "relevant" commit is one that is !UNINTERESTING (ie we are including it
* in our list), or that is a specified BOTTOM commit. Then after computing
* a limited list, during processing we can generally ignore boundary merges
* coming from outside the graph, (ie from irrelevant parents), and treat
* those merges as if they were single-parent. TREESAME is defined to consider
* only relevant parents, if any. If we are TREESAME to our on-graph parents,
* we don't care if we were !TREESAME to non-graph parents.
*
* Treating bottom commits as relevant ensures that a limited graph's
* connection to the actual bottom commit is not viewed as a side branch, but
* treated as part of the graph. For example:
*
* ....Z...A---X---o---o---B
* . /
* W---Y
*
* When computing "A..B", the A-X connection is at least as important as
* Y-X, despite A being flagged UNINTERESTING.
*
* And when computing --ancestry-path "A..B", the A-X connection is more
* important than Y-X, despite both A and Y being flagged UNINTERESTING.
*/
static inline int relevant_commit(struct commit *commit)
{
return (commit->object.flags & (UNINTERESTING | BOTTOM)) != UNINTERESTING;
}
/*
* Return a single relevant commit from a parent list. If we are a TREESAME
* commit, and this selects one of our parents, then we can safely simplify to
* that parent.
*/
static struct commit *one_relevant_parent(const struct rev_info *revs,
struct commit_list *orig)
{
struct commit_list *list = orig;
struct commit *relevant = NULL;
if (!orig)
return NULL;
/*
* For 1-parent commits, or if first-parent-only, then return that
* first parent (even if not "relevant" by the above definition).
* TREESAME will have been set purely on that parent.
*/
if (revs->first_parent_only || !orig->next)
return orig->item;
/*
* For multi-parent commits, identify a sole relevant parent, if any.
* If we have only one relevant parent, then TREESAME will be set purely
* with regard to that parent, and we can simplify accordingly.
*
* If we have more than one relevant parent, or no relevant parents
* (and multiple irrelevant ones), then we can't select a parent here
* and return NULL.
*/
while (list) {
struct commit *commit = list->item;
list = list->next;
if (relevant_commit(commit)) {
if (relevant)
return NULL;
relevant = commit;
}
}
return relevant;
}
/*
* The goal is to get REV_TREE_NEW as the result only if the
* diff consists of all '+' (and no other changes), REV_TREE_OLD
* if the whole diff is removal of old data, and otherwise
* REV_TREE_DIFFERENT (of course if the trees are the same we
* want REV_TREE_SAME).
*
* The only time we care about the distinction is when
* remove_empty_trees is in effect, in which case we care only about
* whether the whole change is REV_TREE_NEW, or if there's another type
* of change. Which means we can stop the diff early in either of these
* cases:
*
* 1. We're not using remove_empty_trees at all.
*
* 2. We saw anything except REV_TREE_NEW.
*/
static int tree_difference = REV_TREE_SAME;
static void file_add_remove(struct diff_options *options,
int addremove, unsigned mode,
const struct object_id *oid,
int oid_valid,
const char *fullpath, unsigned dirty_submodule)
{
int diff = addremove == '+' ? REV_TREE_NEW : REV_TREE_OLD;
struct rev_info *revs = options->change_fn_data;
tree_difference |= diff;
if (!revs->remove_empty_trees || tree_difference != REV_TREE_NEW)
options->flags.has_changes = 1;
}
static void file_change(struct diff_options *options,
unsigned old_mode, unsigned new_mode,
const struct object_id *old_oid,
const struct object_id *new_oid,
int old_oid_valid, int new_oid_valid,
const char *fullpath,
unsigned old_dirty_submodule, unsigned new_dirty_submodule)
{
tree_difference = REV_TREE_DIFFERENT;
options->flags.has_changes = 1;
}
static int rev_compare_tree(struct rev_info *revs,
struct commit *parent, struct commit *commit)
{
struct tree *t1 = get_commit_tree(parent);
struct tree *t2 = get_commit_tree(commit);
if (!t1)
return REV_TREE_NEW;
if (!t2)
return REV_TREE_OLD;
if (revs->simplify_by_decoration) {
/*
* If we are simplifying by decoration, then the commit
* is worth showing if it has a tag pointing at it.
*/
if (get_name_decoration(&commit->object))
return REV_TREE_DIFFERENT;
/*
* A commit that is not pointed by a tag is uninteresting
* if we are not limited by path. This means that you will
* see the usual "commits that touch the paths" plus any
* tagged commit by specifying both --simplify-by-decoration
* and pathspec.
*/
if (!revs->prune_data.nr)
return REV_TREE_SAME;
}
tree_difference = REV_TREE_SAME;
revs->pruning.flags.has_changes = 0;
if (diff_tree_oid(&t1->object.oid, &t2->object.oid, "",
&revs->pruning) < 0)
return REV_TREE_DIFFERENT;
return tree_difference;
}
static int rev_same_tree_as_empty(struct rev_info *revs, struct commit *commit)
{
int retval;
struct tree *t1 = get_commit_tree(commit);
if (!t1)
return 0;
tree_difference = REV_TREE_SAME;
revs->pruning.flags.has_changes = 0;
retval = diff_tree_oid(NULL, &t1->object.oid, "", &revs->pruning);
return retval >= 0 && (tree_difference == REV_TREE_SAME);
}
struct treesame_state {
unsigned int nparents;
unsigned char treesame[FLEX_ARRAY];
};
static struct treesame_state *initialise_treesame(struct rev_info *revs, struct commit *commit)
{
unsigned n = commit_list_count(commit->parents);
struct treesame_state *st = xcalloc(1, st_add(sizeof(*st), n));
st->nparents = n;
add_decoration(&revs->treesame, &commit->object, st);
return st;
}
/*
* Must be called immediately after removing the nth_parent from a commit's
* parent list, if we are maintaining the per-parent treesame[] decoration.
* This does not recalculate the master TREESAME flag - update_treesame()
* should be called to update it after a sequence of treesame[] modifications
* that may have affected it.
*/
static int compact_treesame(struct rev_info *revs, struct commit *commit, unsigned nth_parent)
{
struct treesame_state *st;
int old_same;
if (!commit->parents) {
/*
* Have just removed the only parent from a non-merge.
* Different handling, as we lack decoration.
*/
if (nth_parent != 0)
die("compact_treesame %u", nth_parent);
old_same = !!(commit->object.flags & TREESAME);
if (rev_same_tree_as_empty(revs, commit))
commit->object.flags |= TREESAME;
else
commit->object.flags &= ~TREESAME;
return old_same;
}
st = lookup_decoration(&revs->treesame, &commit->object);
if (!st || nth_parent >= st->nparents)
die("compact_treesame %u", nth_parent);
old_same = st->treesame[nth_parent];
memmove(st->treesame + nth_parent,
st->treesame + nth_parent + 1,
st->nparents - nth_parent - 1);
/*
* If we've just become a non-merge commit, update TREESAME
* immediately, and remove the no-longer-needed decoration.
* If still a merge, defer update until update_treesame().
*/
if (--st->nparents == 1) {
if (commit->parents->next)
die("compact_treesame parents mismatch");
if (st->treesame[0] && revs->dense)
commit->object.flags |= TREESAME;
else
commit->object.flags &= ~TREESAME;
free(add_decoration(&revs->treesame, &commit->object, NULL));
}
return old_same;
}
static unsigned update_treesame(struct rev_info *revs, struct commit *commit)
{
if (commit->parents && commit->parents->next) {
unsigned n;
struct treesame_state *st;
struct commit_list *p;
unsigned relevant_parents;
unsigned relevant_change, irrelevant_change;
st = lookup_decoration(&revs->treesame, &commit->object);
if (!st)
die("update_treesame %s", oid_to_hex(&commit->object.oid));
relevant_parents = 0;
relevant_change = irrelevant_change = 0;
for (p = commit->parents, n = 0; p; n++, p = p->next) {
if (relevant_commit(p->item)) {
relevant_change |= !st->treesame[n];
relevant_parents++;
} else
irrelevant_change |= !st->treesame[n];
}
if (relevant_parents ? relevant_change : irrelevant_change)
commit->object.flags &= ~TREESAME;
else
commit->object.flags |= TREESAME;
}
return commit->object.flags & TREESAME;
}
static inline int limiting_can_increase_treesame(const struct rev_info *revs)
{
/*
* TREESAME is irrelevant unless prune && dense;
* if simplify_history is set, we can't have a mixture of TREESAME and
* !TREESAME INTERESTING parents (and we don't have treesame[]
* decoration anyway);
* if first_parent_only is set, then the TREESAME flag is locked
* against the first parent (and again we lack treesame[] decoration).
*/
return revs->prune && revs->dense &&
!revs->simplify_history &&
!revs->first_parent_only;
}
static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
{
struct commit_list **pp, *parent;
struct treesame_state *ts = NULL;
int relevant_change = 0, irrelevant_change = 0;
int relevant_parents, nth_parent;
/*
* If we don't do pruning, everything is interesting
*/
if (!revs->prune)
return;
if (!get_commit_tree(commit))
return;
if (!commit->parents) {
if (rev_same_tree_as_empty(revs, commit))
commit->object.flags |= TREESAME;
return;
}
/*
* Normal non-merge commit? If we don't want to make the
* history dense, we consider it always to be a change..
*/
if (!revs->dense && !commit->parents->next)
return;
for (pp = &commit->parents, nth_parent = 0, relevant_parents = 0;
(parent = *pp) != NULL;
pp = &parent->next, nth_parent++) {
struct commit *p = parent->item;
if (relevant_commit(p))
relevant_parents++;
if (nth_parent == 1) {
/*
* This our second loop iteration - so we now know
* we're dealing with a merge.
*
* Do not compare with later parents when we care only about
* the first parent chain, in order to avoid derailing the
* traversal to follow a side branch that brought everything
* in the path we are limited to by the pathspec.
*/
if (revs->first_parent_only)
break;
/*
* If this will remain a potentially-simplifiable
* merge, remember per-parent treesame if needed.
* Initialise the array with the comparison from our
* first iteration.
*/
if (revs->treesame.name &&
!revs->simplify_history &&
!(commit->object.flags & UNINTERESTING)) {
ts = initialise_treesame(revs, commit);
if (!(irrelevant_change || relevant_change))
ts->treesame[0] = 1;
}
}
if (parse_commit(p) < 0)
die("cannot simplify commit %s (because of %s)",
oid_to_hex(&commit->object.oid),
oid_to_hex(&p->object.oid));
switch (rev_compare_tree(revs, p, commit)) {
case REV_TREE_SAME:
if (!revs->simplify_history || !relevant_commit(p)) {
/* Even if a merge with an uninteresting
* side branch brought the entire change
* we are interested in, we do not want
* to lose the other branches of this
* merge, so we just keep going.
*/
if (ts)
ts->treesame[nth_parent] = 1;
continue;
}
parent->next = NULL;
commit->parents = parent;
commit->object.flags |= TREESAME;
return;
case REV_TREE_NEW:
if (revs->remove_empty_trees &&
rev_same_tree_as_empty(revs, p)) {
/* We are adding all the specified
* paths from this parent, so the
* history beyond this parent is not
* interesting. Remove its parents
* (they are grandparents for us).
* IOW, we pretend this parent is a
* "root" commit.
*/
if (parse_commit(p) < 0)
die("cannot simplify commit %s (invalid %s)",
oid_to_hex(&commit->object.oid),
oid_to_hex(&p->object.oid));
p->parents = NULL;
}
/* fallthrough */
case REV_TREE_OLD:
case REV_TREE_DIFFERENT:
if (relevant_commit(p))
relevant_change = 1;
else
irrelevant_change = 1;
continue;
}
die("bad tree compare for commit %s", oid_to_hex(&commit->object.oid));
}
/*
* TREESAME is straightforward for single-parent commits. For merge
* commits, it is most useful to define it so that "irrelevant"
* parents cannot make us !TREESAME - if we have any relevant
* parents, then we only consider TREESAMEness with respect to them,
* allowing irrelevant merges from uninteresting branches to be
* simplified away. Only if we have only irrelevant parents do we
* base TREESAME on them. Note that this logic is replicated in
* update_treesame, which should be kept in sync.
*/
if (relevant_parents ? !relevant_change : !irrelevant_change)
commit->object.flags |= TREESAME;
}
static int process_parents(struct rev_info *revs, struct commit *commit,
struct commit_list **list, struct prio_queue *queue)
{
struct commit_list *parent = commit->parents;
unsigned left_flag;
if (commit->object.flags & ADDED)
return 0;
commit->object.flags |= ADDED;
if (revs->include_check &&
!revs->include_check(commit, revs->include_check_data))
return 0;
/*
* If the commit is uninteresting, don't try to
* prune parents - we want the maximal uninteresting
* set.
*
* Normally we haven't parsed the parent
* yet, so we won't have a parent of a parent
* here. However, it may turn out that we've
* reached this commit some other way (where it
* wasn't uninteresting), in which case we need
* to mark its parents recursively too..
*/
if (commit->object.flags & UNINTERESTING) {
while (parent) {
struct commit *p = parent->item;
parent = parent->next;
if (p)
p->object.flags |= UNINTERESTING;
if (parse_commit_gently(p, 1) < 0)
continue;
if (p->parents)
mark_parents_uninteresting(p);
if (p->object.flags & SEEN)
continue;
p->object.flags |= SEEN;
if (list)
commit_list_insert_by_date(p, list);
if (queue)
prio_queue_put(queue, p);
}
return 0;
}
/*
* Ok, the commit wasn't uninteresting. Try to
* simplify the commit history and find the parent
* that has no differences in the path set if one exists.
*/
try_to_simplify_commit(revs, commit);
if (revs->no_walk)
return 0;
left_flag = (commit->object.flags & SYMMETRIC_LEFT);
for (parent = commit->parents; parent; parent = parent->next) {
struct commit *p = parent->item;
int gently = revs->ignore_missing_links ||
revs->exclude_promisor_objects;
if (parse_commit_gently(p, gently) < 0) {
if (revs->exclude_promisor_objects &&
is_promisor_object(&p->object.oid)) {
if (revs->first_parent_only)
break;
continue;
}
return -1;
}
if (revs->sources) {
char **slot = revision_sources_at(revs->sources, p);
if (!*slot)
*slot = *revision_sources_at(revs->sources, commit);
}
p->object.flags |= left_flag;
if (!(p->object.flags & SEEN)) {
p->object.flags |= SEEN;
if (list)
commit_list_insert_by_date(p, list);
if (queue)
prio_queue_put(queue, p);
}
if (revs->first_parent_only)
break;
}
return 0;
}
static void cherry_pick_list(struct commit_list *list, struct rev_info *revs)
{
struct commit_list *p;
int left_count = 0, right_count = 0;
int left_first;
struct patch_ids ids;
unsigned cherry_flag;
/* First count the commits on the left and on the right */
for (p = list; p; p = p->next) {
struct commit *commit = p->item;
unsigned flags = commit->object.flags;
if (flags & BOUNDARY)
;
else if (flags & SYMMETRIC_LEFT)
left_count++;
else
right_count++;
}
if (!left_count || !right_count)
return;
left_first = left_count < right_count;
init_patch_ids(revs->repo, &ids);
ids.diffopts.pathspec = revs->diffopt.pathspec;
/* Compute patch-ids for one side */
for (p = list; p; p = p->next) {
struct commit *commit = p->item;
unsigned flags = commit->object.flags;
if (flags & BOUNDARY)
continue;
/*
* If we have fewer left, left_first is set and we omit
* commits on the right branch in this loop. If we have
* fewer right, we skip the left ones.
*/
if (left_first != !!(flags & SYMMETRIC_LEFT))
continue;
add_commit_patch_id(commit, &ids);
}
/* either cherry_mark or cherry_pick are true */
cherry_flag = revs->cherry_mark ? PATCHSAME : SHOWN;
/* Check the other side */
for (p = list; p; p = p->next) {
struct commit *commit = p->item;
struct patch_id *id;
unsigned flags = commit->object.flags;
if (flags & BOUNDARY)
continue;
/*
* If we have fewer left, left_first is set and we omit
* commits on the left branch in this loop.
*/
if (left_first == !!(flags & SYMMETRIC_LEFT))
continue;
/*
* Have we seen the same patch id?
*/
id = has_commit_patch_id(commit, &ids);
if (!id)
continue;
commit->object.flags |= cherry_flag;
id->commit->object.flags |= cherry_flag;
}
free_patch_ids(&ids);
}
/* How many extra uninteresting commits we want to see.. */
#define SLOP 5
static int still_interesting(struct commit_list *src, timestamp_t date, int slop,
struct commit **interesting_cache)
{
/*
* No source list at all? We're definitely done..
*/
if (!src)
return 0;
/*
* Does the destination list contain entries with a date
* before the source list? Definitely _not_ done.
*/
if (date <= src->item->date)
return SLOP;
/*
* Does the source list still have interesting commits in
* it? Definitely not done..
*/
if (!everybody_uninteresting(src, interesting_cache))
return SLOP;
/* Ok, we're closing in.. */
return slop-1;
}
/*
* "rev-list --ancestry-path A..B" computes commits that are ancestors
* of B but not ancestors of A but further limits the result to those
* that are descendants of A. This takes the list of bottom commits and
* the result of "A..B" without --ancestry-path, and limits the latter
* further to the ones that can reach one of the commits in "bottom".
*/
static void limit_to_ancestry(struct commit_list *bottom, struct commit_list *list)
{
struct commit_list *p;
struct commit_list *rlist = NULL;
int made_progress;
/*
* Reverse the list so that it will be likely that we would
* process parents before children.
*/
for (p = list; p; p = p->next)
commit_list_insert(p->item, &rlist);
for (p = bottom; p; p = p->next)
p->item->object.flags |= TMP_MARK;
/*
* Mark the ones that can reach bottom commits in "list",
* in a bottom-up fashion.
*/
do {
made_progress = 0;
for (p = rlist; p; p = p->next) {
struct commit *c = p->item;
struct commit_list *parents;
if (c->object.flags & (TMP_MARK | UNINTERESTING))
continue;
for (parents = c->parents;
parents;
parents = parents->next) {
if (!(parents->item->object.flags & TMP_MARK))
continue;
c->object.flags |= TMP_MARK;
made_progress = 1;
break;
}
}
} while (made_progress);
/*
* NEEDSWORK: decide if we want to remove parents that are
* not marked with TMP_MARK from commit->parents for commits
* in the resulting list. We may not want to do that, though.
*/
/*
* The ones that are not marked with TMP_MARK are uninteresting
*/
for (p = list; p; p = p->next) {
struct commit *c = p->item;
if (c->object.flags & TMP_MARK)
continue;
c->object.flags |= UNINTERESTING;
}
/* We are done with the TMP_MARK */
for (p = list; p; p = p->next)
p->item->object.flags &= ~TMP_MARK;
for (p = bottom; p; p = p->next)
p->item->object.flags &= ~TMP_MARK;
free_commit_list(rlist);
}
/*
* Before walking the history, keep the set of "negative" refs the
* caller has asked to exclude.
*
* This is used to compute "rev-list --ancestry-path A..B", as we need
* to filter the result of "A..B" further to the ones that can actually
* reach A.
*/
static struct commit_list *collect_bottom_commits(struct commit_list *list)
{
struct commit_list *elem, *bottom = NULL;
for (elem = list; elem; elem = elem->next)
if (elem->item->object.flags & BOTTOM)
commit_list_insert(elem->item, &bottom);
return bottom;
}
/* Assumes either left_only or right_only is set */
static void limit_left_right(struct commit_list *list, struct rev_info *revs)
{
struct commit_list *p;
for (p = list; p; p = p->next) {
struct commit *commit = p->item;
if (revs->right_only) {
if (commit->object.flags & SYMMETRIC_LEFT)
commit->object.flags |= SHOWN;
} else /* revs->left_only is set */
if (!(commit->object.flags & SYMMETRIC_LEFT))
commit->object.flags |= SHOWN;
}
}
static int limit_list(struct rev_info *revs)
{
int slop = SLOP;
timestamp_t date = TIME_MAX;
struct commit_list *list = revs->commits;
struct commit_list *newlist = NULL;
struct commit_list **p = &newlist;
struct commit_list *bottom = NULL;
struct commit *interesting_cache = NULL;
if (revs->ancestry_path) {
bottom = collect_bottom_commits(list);
if (!bottom)
die("--ancestry-path given but there are no bottom commits");
}
while (list) {
struct commit *commit = pop_commit(&list);
struct object *obj = &commit->object;
show_early_output_fn_t show;
if (commit == interesting_cache)
interesting_cache = NULL;
if (revs->max_age != -1 && (commit->date < revs->max_age))
obj->flags |= UNINTERESTING;
if (process_parents(revs, commit, &list, NULL) < 0)
return -1;
if (obj->flags & UNINTERESTING) {
mark_parents_uninteresting(commit);
slop = still_interesting(list, date, slop, &interesting_cache);
if (slop)
continue;
break;
}
if (revs->min_age != -1 && (commit->date > revs->min_age))
continue;
date = commit->date;
p = &commit_list_insert(commit, p)->next;
show = show_early_output;
if (!show)
continue;
show(revs, newlist);
show_early_output = NULL;
}
if (revs->cherry_pick || revs->cherry_mark)
cherry_pick_list(newlist, revs);
if (revs->left_only || revs->right_only)
limit_left_right(newlist, revs);
if (bottom) {
limit_to_ancestry(bottom, newlist);
free_commit_list(bottom);
}
/*
* Check if any commits have become TREESAME by some of their parents
* becoming UNINTERESTING.
*/
if (limiting_can_increase_treesame(revs))
for (list = newlist; list; list = list->next) {
struct commit *c = list->item;
if (c->object.flags & (UNINTERESTING | TREESAME))
continue;
update_treesame(revs, c);
}
revs->commits = newlist;
return 0;
}
/*
* Add an entry to refs->cmdline with the specified information.
* *name is copied.
*/
static void add_rev_cmdline(struct rev_info *revs,
struct object *item,
const char *name,
int whence,
unsigned flags)
{
struct rev_cmdline_info *info = &revs->cmdline;
unsigned int nr = info->nr;
ALLOC_GROW(info->rev, nr + 1, info->alloc);
info->rev[nr].item = item;
info->rev[nr].name = xstrdup(name);
info->rev[nr].whence = whence;
info->rev[nr].flags = flags;
info->nr++;
}
static void add_rev_cmdline_list(struct rev_info *revs,
struct commit_list *commit_list,
int whence,
unsigned flags)
{
while (commit_list) {
struct object *object = &commit_list->item->object;
add_rev_cmdline(revs, object, oid_to_hex(&object->oid),
whence, flags);
commit_list = commit_list->next;
}
}
struct all_refs_cb {
int all_flags;
int warned_bad_reflog;
struct rev_info *all_revs;
const char *name_for_errormsg;
struct worktree *wt;
};
int ref_excluded(struct string_list *ref_excludes, const char *path)
{
struct string_list_item *item;
if (!ref_excludes)
return 0;
for_each_string_list_item(item, ref_excludes) {
if (!wildmatch(item->string, path, 0))
return 1;
}
return 0;
}
static int handle_one_ref(const char *path, const struct object_id *oid,
int flag, void *cb_data)
{
struct all_refs_cb *cb = cb_data;
struct object *object;
if (ref_excluded(cb->all_revs->ref_excludes, path))
return 0;
object = get_reference(cb->all_revs, path, oid, cb->all_flags);
add_rev_cmdline(cb->all_revs, object, path, REV_CMD_REF, cb->all_flags);
add_pending_oid(cb->all_revs, path, oid, cb->all_flags);
return 0;
}
static void init_all_refs_cb(struct all_refs_cb *cb, struct rev_info *revs,
unsigned flags)
{
cb->all_revs = revs;
cb->all_flags = flags;
revs->rev_input_given = 1;
cb->wt = NULL;
}
void clear_ref_exclusion(struct string_list **ref_excludes_p)
{
if (*ref_excludes_p) {
string_list_clear(*ref_excludes_p, 0);
free(*ref_excludes_p);
}
*ref_excludes_p = NULL;
}
void add_ref_exclusion(struct string_list **ref_excludes_p, const char *exclude)
{
if (!*ref_excludes_p) {
*ref_excludes_p = xcalloc(1, sizeof(**ref_excludes_p));
(*ref_excludes_p)->strdup_strings = 1;
}
string_list_append(*ref_excludes_p, exclude);
}
static void handle_refs(struct ref_store *refs,
struct rev_info *revs, unsigned flags,
int (*for_each)(struct ref_store *, each_ref_fn, void *))
{
struct all_refs_cb cb;
if (!refs) {
/* this could happen with uninitialized submodules */
return;
}
init_all_refs_cb(&cb, revs, flags);
for_each(refs, handle_one_ref, &cb);
}
static void handle_one_reflog_commit(struct object_id *oid, void *cb_data)
{
struct all_refs_cb *cb = cb_data;
if (!is_null_oid(oid)) {
struct object *o = parse_object(cb->all_revs->repo, oid);
if (o) {
o->flags |= cb->all_flags;
/* ??? CMDLINEFLAGS ??? */
add_pending_object(cb->all_revs, o, "");
}
else if (!cb->warned_bad_reflog) {
warning("reflog of '%s' references pruned commits",
cb->name_for_errormsg);
cb->warned_bad_reflog = 1;
}
}
}
static int handle_one_reflog_ent(struct object_id *ooid, struct object_id *noid,
const char *email, timestamp_t timestamp, int tz,
const char *message, void *cb_data)
{
handle_one_reflog_commit(ooid, cb_data);
handle_one_reflog_commit(noid, cb_data);
return 0;
}
static int handle_one_reflog(const char *refname_in_wt,
const struct object_id *oid,
int flag, void *cb_data)
{
struct all_refs_cb *cb = cb_data;
struct strbuf refname = STRBUF_INIT;
cb->warned_bad_reflog = 0;
strbuf_worktree_ref(cb->wt, &refname, refname_in_wt);
cb->name_for_errormsg = refname.buf;
refs_for_each_reflog_ent(get_main_ref_store(the_repository),
refname.buf,
handle_one_reflog_ent, cb_data);
strbuf_release(&refname);
return 0;
}
static void add_other_reflogs_to_pending(struct all_refs_cb *cb)
{
struct worktree **worktrees, **p;
worktrees = get_worktrees(0);
for (p = worktrees; *p; p++) {
struct worktree *wt = *p;
if (wt->is_current)
continue;
cb->wt = wt;
refs_for_each_reflog(get_worktree_ref_store(wt),
handle_one_reflog,
cb);
}
free_worktrees(worktrees);
}
void add_reflogs_to_pending(struct rev_info *revs, unsigned flags)
{
struct all_refs_cb cb;
cb.all_revs = revs;
cb.all_flags = flags;
cb.wt = NULL;
for_each_reflog(handle_one_reflog, &cb);
if (!revs->single_worktree)
add_other_reflogs_to_pending(&cb);
}
static void add_cache_tree(struct cache_tree *it, struct rev_info *revs,
struct strbuf *path, unsigned int flags)
{
size_t baselen = path->len;
int i;
if (it->entry_count >= 0) {
struct tree *tree = lookup_tree(revs->repo, &it->oid);
tree->object.flags |= flags;
add_pending_object_with_path(revs, &tree->object, "",
040000, path->buf);
}
for (i = 0; i < it->subtree_nr; i++) {
struct cache_tree_sub *sub = it->down[i];
strbuf_addf(path, "%s%s", baselen ? "/" : "", sub->name);
add_cache_tree(sub->cache_tree, revs, path, flags);
strbuf_setlen(path, baselen);
}
}
static void do_add_index_objects_to_pending(struct rev_info *revs,
struct index_state *istate,
unsigned int flags)
{
int i;
for (i = 0; i < istate->cache_nr; i++) {
struct cache_entry *ce = istate->cache[i];
struct blob *blob;
if (S_ISGITLINK(ce->ce_mode))
continue;
blob = lookup_blob(revs->repo, &ce->oid);
if (!blob)
die("unable to add index blob to traversal");
blob->object.flags |= flags;
add_pending_object_with_path(revs, &blob->object, "",
ce->ce_mode, ce->name);
}
if (istate->cache_tree) {
struct strbuf path = STRBUF_INIT;
add_cache_tree(istate->cache_tree, revs, &path, flags);
strbuf_release(&path);
}
}
void add_index_objects_to_pending(struct rev_info *revs, unsigned int flags)
{
struct worktree **worktrees, **p;
repo_read_index(revs->repo);
do_add_index_objects_to_pending(revs, revs->repo->index, flags);
if (revs->single_worktree)
return;
worktrees = get_worktrees(0);
for (p = worktrees; *p; p++) {
struct worktree *wt = *p;
struct index_state istate = { NULL };
if (wt->is_current)
continue; /* current index already taken care of */
if (read_index_from(&istate,
worktree_git_path(wt, "index"),
get_worktree_git_dir(wt)) > 0)
do_add_index_objects_to_pending(revs, &istate, flags);
discard_index(&istate);
}
free_worktrees(worktrees);
}
struct add_alternate_refs_data {
struct rev_info *revs;
unsigned int flags;
};
static void add_one_alternate_ref(const struct object_id *oid,
void *vdata)
{
const char *name = ".alternate";
struct add_alternate_refs_data *data = vdata;
struct object *obj;
obj = get_reference(data->revs, name, oid, data->flags);
add_rev_cmdline(data->revs, obj, name, REV_CMD_REV, data->flags);
add_pending_object(data->revs, obj, name);
}
static void add_alternate_refs_to_pending(struct rev_info *revs,
unsigned int flags)
{
struct add_alternate_refs_data data;
data.revs = revs;
data.flags = flags;
for_each_alternate_ref(add_one_alternate_ref, &data);
}
static int add_parents_only(struct rev_info *revs, const char *arg_, int flags,
int exclude_parent)
{
struct object_id oid;
struct object *it;
struct commit *commit;
struct commit_list *parents;
int parent_number;
const char *arg = arg_;
if (*arg == '^') {
flags ^= UNINTERESTING | BOTTOM;
arg++;
}
if (get_oid_committish(arg, &oid))
return 0;
while (1) {
it = get_reference(revs, arg, &oid, 0);
if (!it && revs->ignore_missing)
return 0;
if (it->type != OBJ_TAG)
break;
if (!((struct tag*)it)->tagged)
return 0;
oidcpy(&oid, &((struct tag*)it)->tagged->oid);
}
if (it->type != OBJ_COMMIT)
return 0;
commit = (struct commit *)it;
if (exclude_parent &&
exclude_parent > commit_list_count(commit->parents))
return 0;
for (parents = commit->parents, parent_number = 1;
parents;
parents = parents->next, parent_number++) {
if (exclude_parent && parent_number != exclude_parent)
continue;
it = &parents->item->object;
it->flags |= flags;
add_rev_cmdline(revs, it, arg_, REV_CMD_PARENTS_ONLY, flags);
add_pending_object(revs, it, arg);
}
return 1;
}
void repo_init_revisions(struct repository *r,
struct rev_info *revs,
const char *prefix)
{
memset(revs, 0, sizeof(*revs));
revs->repo = r;
revs->abbrev = DEFAULT_ABBREV;
revs->ignore_merges = 1;
revs->simplify_history = 1;
revs->pruning.repo = r;
revs->pruning.flags.recursive = 1;
revs->pruning.flags.quick = 1;
revs->pruning.add_remove = file_add_remove;
revs->pruning.change = file_change;
revs->pruning.change_fn_data = revs;
revs->sort_order = REV_SORT_IN_GRAPH_ORDER;
revs->dense = 1;
revs->prefix = prefix;
revs->max_age = -1;
revs->min_age = -1;
revs->skip_count = -1;
revs->max_count = -1;
revs->max_parents = -1;
revs->expand_tabs_in_log = -1;
revs->commit_format = CMIT_FMT_DEFAULT;
revs->expand_tabs_in_log_default = 8;
init_grep_defaults(revs->repo);
grep_init(&revs->grep_filter, revs->repo, prefix);
revs->grep_filter.status_only = 1;
repo_diff_setup(revs->repo, &revs->diffopt);
if (prefix && !revs->diffopt.prefix) {
revs->diffopt.prefix = prefix;
revs->diffopt.prefix_length = strlen(prefix);
}
revs->notes_opt.use_default_notes = -1;
}
static void add_pending_commit_list(struct rev_info *revs,
struct commit_list *commit_list,
unsigned int flags)
{
while (commit_list) {
struct object *object = &commit_list->item->object;
object->flags |= flags;
add_pending_object(revs, object, oid_to_hex(&object->oid));
commit_list = commit_list->next;
}
}
static void prepare_show_merge(struct rev_info *revs)
{
struct commit_list *bases;
struct commit *head, *other;
struct object_id oid;
const char **prune = NULL;
int i, prune_num = 1; /* counting terminating NULL */
struct index_state *istate = revs->repo->index;
if (get_oid("HEAD", &oid))
die("--merge without HEAD?");
head = lookup_commit_or_die(&oid, "HEAD");
if (get_oid("MERGE_HEAD", &oid))
die("--merge without MERGE_HEAD?");
other = lookup_commit_or_die(&oid, "MERGE_HEAD");
add_pending_object(revs, &head->object, "HEAD");
add_pending_object(revs, &other->object, "MERGE_HEAD");
bases = get_merge_bases(head, other);
add_rev_cmdline_list(revs, bases, REV_CMD_MERGE_BASE, UNINTERESTING | BOTTOM);
add_pending_commit_list(revs, bases, UNINTERESTING | BOTTOM);
free_commit_list(bases);
head->object.flags |= SYMMETRIC_LEFT;
if (!istate->cache_nr)
repo_read_index(revs->repo);
for (i = 0; i < istate->cache_nr; i++) {
const struct cache_entry *ce = istate->cache[i];
if (!ce_stage(ce))
continue;
if (ce_path_match(istate, ce, &revs->prune_data, NULL)) {
prune_num++;
REALLOC_ARRAY(prune, prune_num);
prune[prune_num-2] = ce->name;
prune[prune_num-1] = NULL;
}
while ((i+1 < istate->cache_nr) &&
ce_same_name(ce, istate->cache[i+1]))
i++;
}
clear_pathspec(&revs->prune_data);
parse_pathspec(&revs->prune_data, PATHSPEC_ALL_MAGIC & ~PATHSPEC_LITERAL,
PATHSPEC_PREFER_FULL | PATHSPEC_LITERAL_PATH, "", prune);
revs->limited = 1;
}
static int dotdot_missing(const char *arg, char *dotdot,
struct rev_info *revs, int symmetric)
{
if (revs->ignore_missing)
return 0;
/* de-munge so we report the full argument */
*dotdot = '.';
die(symmetric
? "Invalid symmetric difference expression %s"
: "Invalid revision range %s", arg);
}
static int handle_dotdot_1(const char *arg, char *dotdot,
struct rev_info *revs, int flags,
int cant_be_filename,
struct object_context *a_oc,
struct object_context *b_oc)
{
const char *a_name, *b_name;
struct object_id a_oid, b_oid;
struct object *a_obj, *b_obj;
unsigned int a_flags, b_flags;
int symmetric = 0;
unsigned int flags_exclude = flags ^ (UNINTERESTING | BOTTOM);
unsigned int oc_flags = GET_OID_COMMITTISH | GET_OID_RECORD_PATH;
a_name = arg;
if (!*a_name)
a_name = "HEAD";
b_name = dotdot + 2;
if (*b_name == '.') {
symmetric = 1;
b_name++;
}
if (!*b_name)
b_name = "HEAD";
if (get_oid_with_context(revs->repo, a_name, oc_flags, &a_oid, a_oc) ||
get_oid_with_context(revs->repo, b_name, oc_flags, &b_oid, b_oc))
return -1;
if (!cant_be_filename) {
*dotdot = '.';
verify_non_filename(revs->prefix, arg);
*dotdot = '\0';
}
a_obj = parse_object(revs->repo, &a_oid);
b_obj = parse_object(revs->repo, &b_oid);
if (!a_obj || !b_obj)
return dotdot_missing(arg, dotdot, revs, symmetric);
if (!symmetric) {
/* just A..B */
b_flags = flags;
a_flags = flags_exclude;
} else {
/* A...B -- find merge bases between the two */
struct commit *a, *b;
struct commit_list *exclude;
a = lookup_commit_reference(revs->repo, &a_obj->oid);
b = lookup_commit_reference(revs->repo, &b_obj->oid);
if (!a || !b)
return dotdot_missing(arg, dotdot, revs, symmetric);
exclude = get_merge_bases(a, b);
add_rev_cmdline_list(revs, exclude, REV_CMD_MERGE_BASE,
flags_exclude);
add_pending_commit_list(revs, exclude, flags_exclude);
free_commit_list(exclude);
b_flags = flags;
a_flags = flags | SYMMETRIC_LEFT;
}
a_obj->flags |= a_flags;
b_obj->flags |= b_flags;
add_rev_cmdline(revs, a_obj, a_name, REV_CMD_LEFT, a_flags);
add_rev_cmdline(revs, b_obj, b_name, REV_CMD_RIGHT, b_flags);
add_pending_object_with_path(revs, a_obj, a_name, a_oc->mode, a_oc->path);
add_pending_object_with_path(revs, b_obj, b_name, b_oc->mode, b_oc->path);
return 0;
}
static int handle_dotdot(const char *arg,
struct rev_info *revs, int flags,
int cant_be_filename)
{
struct object_context a_oc, b_oc;
char *dotdot = strstr(arg, "..");
int ret;
if (!dotdot)
return -1;
memset(&a_oc, 0, sizeof(a_oc));
memset(&b_oc, 0, sizeof(b_oc));
*dotdot = '\0';
ret = handle_dotdot_1(arg, dotdot, revs, flags, cant_be_filename,
&a_oc, &b_oc);
*dotdot = '.';
free(a_oc.path);
free(b_oc.path);
return ret;
}
int handle_revision_arg(const char *arg_, struct rev_info *revs, int flags, unsigned revarg_opt)
{
struct object_context oc;
char *mark;
struct object *object;
struct object_id oid;
int local_flags;
const char *arg = arg_;
int cant_be_filename = revarg_opt & REVARG_CANNOT_BE_FILENAME;
unsigned get_sha1_flags = GET_OID_RECORD_PATH;
flags = flags & UNINTERESTING ? flags | BOTTOM : flags & ~BOTTOM;
if (!cant_be_filename && !strcmp(arg, "..")) {
/*
* Just ".."? That is not a range but the
* pathspec for the parent directory.
*/
return -1;
}
if (!handle_dotdot(arg, revs, flags, revarg_opt))
return 0;
mark = strstr(arg, "^@");
if (mark && !mark[2]) {
*mark = 0;
if (add_parents_only(revs, arg, flags, 0))
return 0;
*mark = '^';
}
mark = strstr(arg, "^!");
if (mark && !mark[2]) {
*mark = 0;
if (!add_parents_only(revs, arg, flags ^ (UNINTERESTING | BOTTOM), 0))
*mark = '^';
}
mark = strstr(arg, "^-");
if (mark) {
int exclude_parent = 1;
if (mark[2]) {
char *end;
exclude_parent = strtoul(mark + 2, &end, 10);
if (*end != '\0' || !exclude_parent)
return -1;
}
*mark = 0;
if (!add_parents_only(revs, arg, flags ^ (UNINTERESTING | BOTTOM), exclude_parent))
*mark = '^';
}
local_flags = 0;
if (*arg == '^') {
local_flags = UNINTERESTING | BOTTOM;
arg++;
}
if (revarg_opt & REVARG_COMMITTISH)
get_sha1_flags |= GET_OID_COMMITTISH;
if (get_oid_with_context(revs->repo, arg, get_sha1_flags, &oid, &oc))
return revs->ignore_missing ? 0 : -1;
if (!cant_be_filename)
verify_non_filename(revs->prefix, arg);
object = get_reference(revs, arg, &oid, flags ^ local_flags);
if (!object)
return revs->ignore_missing ? 0 : -1;
add_rev_cmdline(revs, object, arg_, REV_CMD_REV, flags ^ local_flags);
add_pending_object_with_path(revs, object, arg, oc.mode, oc.path);
free(oc.path);
return 0;
}
static void read_pathspec_from_stdin(struct strbuf *sb,
struct argv_array *prune)
{
while (strbuf_getline(sb, stdin) != EOF)
argv_array_push(prune, sb->buf);
}
static void read_revisions_from_stdin(struct rev_info *revs,
struct argv_array *prune)
{
struct strbuf sb;
int seen_dashdash = 0;
int save_warning;
save_warning = warn_on_object_refname_ambiguity;
warn_on_object_refname_ambiguity = 0;
strbuf_init(&sb, 1000);
while (strbuf_getline(&sb, stdin) != EOF) {
int len = sb.len;
if (!len)
break;
if (sb.buf[0] == '-') {
if (len == 2 && sb.buf[1] == '-') {
seen_dashdash = 1;
break;
}
die("options not supported in --stdin mode");
}
if (handle_revision_arg(sb.buf, revs, 0,
REVARG_CANNOT_BE_FILENAME))
die("bad revision '%s'", sb.buf);
}
if (seen_dashdash)
read_pathspec_from_stdin(&sb, prune);
strbuf_release(&sb);
warn_on_object_refname_ambiguity = save_warning;
}
static void add_grep(struct rev_info *revs, const char *ptn, enum grep_pat_token what)
{
append_grep_pattern(&revs->grep_filter, ptn, "command line", 0, what);
}
static void add_header_grep(struct rev_info *revs, enum grep_header_field field, const char *pattern)
{
append_header_grep_pattern(&revs->grep_filter, field, pattern);
}
static void add_message_grep(struct rev_info *revs, const char *pattern)
{
add_grep(revs, pattern, GREP_PATTERN_BODY);
}
static int handle_revision_opt(struct rev_info *revs, int argc, const char **argv,
int *unkc, const char **unkv,
const struct setup_revision_opt* opt)
{
const char *arg = argv[0];
const char *optarg;
int argcount;
const unsigned hexsz = the_hash_algo->hexsz;
/* pseudo revision arguments */
if (!strcmp(arg, "--all") || !strcmp(arg, "--branches") ||
!strcmp(arg, "--tags") || !strcmp(arg, "--remotes") ||
!strcmp(arg, "--reflog") || !strcmp(arg, "--not") ||
!strcmp(arg, "--no-walk") || !strcmp(arg, "--do-walk") ||
!strcmp(arg, "--bisect") || starts_with(arg, "--glob=") ||
!strcmp(arg, "--indexed-objects") ||
!strcmp(arg, "--alternate-refs") ||
starts_with(arg, "--exclude=") ||
starts_with(arg, "--branches=") || starts_with(arg, "--tags=") ||
starts_with(arg, "--remotes=") || starts_with(arg, "--no-walk="))
{
unkv[(*unkc)++] = arg;
return 1;
}
if ((argcount = parse_long_opt("max-count", argv, &optarg))) {
revs->max_count = atoi(optarg);
revs->no_walk = 0;
return argcount;
} else if ((argcount = parse_long_opt("skip", argv, &optarg))) {
revs->skip_count = atoi(optarg);
return argcount;
} else if ((*arg == '-') && isdigit(arg[1])) {
/* accept -<digit>, like traditional "head" */
if (strtol_i(arg + 1, 10, &revs->max_count) < 0 ||
revs->max_count < 0)
die("'%s': not a non-negative integer", arg + 1);
revs->no_walk = 0;
} else if (!strcmp(arg, "-n")) {
if (argc <= 1)
return error("-n requires an argument");
revs->max_count = atoi(argv[1]);
revs->no_walk = 0;
return 2;
} else if (skip_prefix(arg, "-n", &optarg)) {
revs->max_count = atoi(optarg);
revs->no_walk = 0;
} else if ((argcount = parse_long_opt("max-age", argv, &optarg))) {
revs->max_age = atoi(optarg);
return argcount;
} else if ((argcount = parse_long_opt("since", argv, &optarg))) {
revs->max_age = approxidate(optarg);
return argcount;
} else if ((argcount = parse_long_opt("after", argv, &optarg))) {
revs->max_age = approxidate(optarg);
return argcount;
} else if ((argcount = parse_long_opt("min-age", argv, &optarg))) {
revs->min_age = atoi(optarg);
return argcount;
} else if ((argcount = parse_long_opt("before", argv, &optarg))) {
revs->min_age = approxidate(optarg);
return argcount;
} else if ((argcount = parse_long_opt("until", argv, &optarg))) {
revs->min_age = approxidate(optarg);
return argcount;
} else if (!strcmp(arg, "--first-parent")) {
revs->first_parent_only = 1;
} else if (!strcmp(arg, "--ancestry-path")) {
revs->ancestry_path = 1;
revs->simplify_history = 0;
revs->limited = 1;
} else if (!strcmp(arg, "-g") || !strcmp(arg, "--walk-reflogs")) {
init_reflog_walk(&revs->reflog_info);
} else if (!strcmp(arg, "--default")) {
if (argc <= 1)
return error("bad --default argument");
revs->def = argv[1];
return 2;
} else if (!strcmp(arg, "--merge")) {
revs->show_merge = 1;
} else if (!strcmp(arg, "--topo-order")) {
revs->sort_order = REV_SORT_IN_GRAPH_ORDER;
revs->topo_order = 1;
} else if (!strcmp(arg, "--simplify-merges")) {
revs->simplify_merges = 1;
revs->topo_order = 1;
revs->rewrite_parents = 1;
revs->simplify_history = 0;
revs->limited = 1;
} else if (!strcmp(arg, "--simplify-by-decoration")) {
revs->simplify_merges = 1;
revs->topo_order = 1;
revs->rewrite_parents = 1;
revs->simplify_history = 0;
revs->simplify_by_decoration = 1;
revs->limited = 1;
revs->prune = 1;
} else if (!strcmp(arg, "--date-order")) {
revs->sort_order = REV_SORT_BY_COMMIT_DATE;
revs->topo_order = 1;
} else if (!strcmp(arg, "--author-date-order")) {
revs->sort_order = REV_SORT_BY_AUTHOR_DATE;
revs->topo_order = 1;
} else if (!strcmp(arg, "--early-output")) {
revs->early_output = 100;
revs->topo_order = 1;
} else if (skip_prefix(arg, "--early-output=", &optarg)) {
if (strtoul_ui(optarg, 10, &revs->early_output) < 0)
die("'%s': not a non-negative integer", optarg);
revs->topo_order = 1;
} else if (!strcmp(arg, "--parents")) {
revs->rewrite_parents = 1;
revs->print_parents = 1;
} else if (!strcmp(arg, "--dense")) {
revs->dense = 1;
} else if (!strcmp(arg, "--sparse")) {
revs->dense = 0;
} else if (!strcmp(arg, "--in-commit-order")) {
revs->tree_blobs_in_commit_order = 1;
} else if (!strcmp(arg, "--remove-empty")) {
revs->remove_empty_trees = 1;
} else if (!strcmp(arg, "--merges")) {
revs->min_parents = 2;
} else if (!strcmp(arg, "--no-merges")) {
revs->max_parents = 1;
} else if (skip_prefix(arg, "--min-parents=", &optarg)) {
revs->min_parents = atoi(optarg);
} else if (!strcmp(arg, "--no-min-parents")) {
revs->min_parents = 0;
} else if (skip_prefix(arg, "--max-parents=", &optarg)) {
revs->max_parents = atoi(optarg);
} else if (!strcmp(arg, "--no-max-parents")) {
revs->max_parents = -1;
} else if (!strcmp(arg, "--boundary")) {
revs->boundary = 1;
} else if (!strcmp(arg, "--left-right")) {
revs->left_right = 1;
} else if (!strcmp(arg, "--left-only")) {
if (revs->right_only)
die("--left-only is incompatible with --right-only"
" or --cherry");
revs->left_only = 1;
} else if (!strcmp(arg, "--right-only")) {
if (revs->left_only)
die("--right-only is incompatible with --left-only");
revs->right_only = 1;
} else if (!strcmp(arg, "--cherry")) {
if (revs->left_only)
die("--cherry is incompatible with --left-only");
revs->cherry_mark = 1;
revs->right_only = 1;
revs->max_parents = 1;
revs->limited = 1;
} else if (!strcmp(arg, "--count")) {
revs->count = 1;
} else if (!strcmp(arg, "--cherry-mark")) {
if (revs->cherry_pick)
die("--cherry-mark is incompatible with --cherry-pick");
revs->cherry_mark = 1;
revs->limited = 1; /* needs limit_list() */
} else if (!strcmp(arg, "--cherry-pick")) {
if (revs->cherry_mark)
die("--cherry-pick is incompatible with --cherry-mark");
revs->cherry_pick = 1;
revs->limited = 1;
} else if (!strcmp(arg, "--objects")) {
revs->tag_objects = 1;
revs->tree_objects = 1;
revs->blob_objects = 1;
} else if (!strcmp(arg, "--objects-edge")) {
revs->tag_objects = 1;
revs->tree_objects = 1;
revs->blob_objects = 1;
revs->edge_hint = 1;
} else if (!strcmp(arg, "--objects-edge-aggressive")) {
revs->tag_objects = 1;
revs->tree_objects = 1;
revs->blob_objects = 1;
revs->edge_hint = 1;
revs->edge_hint_aggressive = 1;
} else if (!strcmp(arg, "--verify-objects")) {
revs->tag_objects = 1;
revs->tree_objects = 1;
revs->blob_objects = 1;
revs->verify_objects = 1;
} else if (!strcmp(arg, "--unpacked")) {
revs->unpacked = 1;
} else if (starts_with(arg, "--unpacked=")) {
die("--unpacked=<packfile> no longer supported.");
} else if (!strcmp(arg, "-r")) {
revs->diff = 1;
revs->diffopt.flags.recursive = 1;
} else if (!strcmp(arg, "-t")) {
revs->diff = 1;
revs->diffopt.flags.recursive = 1;
revs->diffopt.flags.tree_in_recursive = 1;
} else if (!strcmp(arg, "-m")) {
revs->ignore_merges = 0;
} else if (!strcmp(arg, "-c")) {
revs->diff = 1;
revs->dense_combined_merges = 0;
revs->combine_merges = 1;
} else if (!strcmp(arg, "--combined-all-paths")) {
revs->diff = 1;
revs->combined_all_paths = 1;
} else if (!strcmp(arg, "--cc")) {
revs->diff = 1;
revs->dense_combined_merges = 1;
revs->combine_merges = 1;
} else if (!strcmp(arg, "-v")) {
revs->verbose_header = 1;
} else if (!strcmp(arg, "--pretty")) {
revs->verbose_header = 1;
revs->pretty_given = 1;
get_commit_format(NULL, revs);
} else if (skip_prefix(arg, "--pretty=", &optarg) ||
skip_prefix(arg, "--format=", &optarg)) {
/*
* Detached form ("--pretty X" as opposed to "--pretty=X")
* not allowed, since the argument is optional.
*/
revs->verbose_header = 1;
revs->pretty_given = 1;
get_commit_format(optarg, revs);
} else if (!strcmp(arg, "--expand-tabs")) {
revs->expand_tabs_in_log = 8;
} else if (!strcmp(arg, "--no-expand-tabs")) {
revs->expand_tabs_in_log = 0;
} else if (skip_prefix(arg, "--expand-tabs=", &arg)) {
int val;
if (strtol_i(arg, 10, &val) < 0 || val < 0)
die("'%s': not a non-negative integer", arg);
revs->expand_tabs_in_log = val;
} else if (!strcmp(arg, "--show-notes") || !strcmp(arg, "--notes")) {
revs->show_notes = 1;
revs->show_notes_given = 1;
revs->notes_opt.use_default_notes = 1;
} else if (!strcmp(arg, "--show-signature")) {
revs->show_signature = 1;
} else if (!strcmp(arg, "--no-show-signature")) {
revs->show_signature = 0;
} else if (!strcmp(arg, "--show-linear-break")) {
revs->break_bar = " ..........";
revs->track_linear = 1;
revs->track_first_time = 1;
} else if (skip_prefix(arg, "--show-linear-break=", &optarg)) {
revs->break_bar = xstrdup(optarg);
revs->track_linear = 1;
revs->track_first_time = 1;
} else if (skip_prefix(arg, "--show-notes=", &optarg) ||
skip_prefix(arg, "--notes=", &optarg)) {
struct strbuf buf = STRBUF_INIT;
revs->show_notes = 1;
revs->show_notes_given = 1;
if (starts_with(arg, "--show-notes=") &&
revs->notes_opt.use_default_notes < 0)
revs->notes_opt.use_default_notes = 1;
strbuf_addstr(&buf, optarg);
expand_notes_ref(&buf);
string_list_append(&revs->notes_opt.extra_notes_refs,
strbuf_detach(&buf, NULL));
} else if (!strcmp(arg, "--no-notes")) {
revs->show_notes = 0;
revs->show_notes_given = 1;
revs->notes_opt.use_default_notes = -1;
/* we have been strdup'ing ourselves, so trick
* string_list into free()ing strings */
revs->notes_opt.extra_notes_refs.strdup_strings = 1;
string_list_clear(&revs->notes_opt.extra_notes_refs, 0);
revs->notes_opt.extra_notes_refs.strdup_strings = 0;
} else if (!strcmp(arg, "--standard-notes")) {
revs->show_notes_given = 1;
revs->notes_opt.use_default_notes = 1;
} else if (!strcmp(arg, "--no-standard-notes")) {
revs->notes_opt.use_default_notes = 0;
} else if (!strcmp(arg, "--oneline")) {
revs->verbose_header = 1;
get_commit_format("oneline", revs);
revs->pretty_given = 1;
revs->abbrev_commit = 1;
} else if (!strcmp(arg, "--graph")) {
revs->topo_order = 1;
revs->rewrite_parents = 1;
revs->graph = graph_init(revs);
} else if (!strcmp(arg, "--root")) {
revs->show_root_diff = 1;
} else if (!strcmp(arg, "--no-commit-id")) {
revs->no_commit_id = 1;
} else if (!strcmp(arg, "--always")) {
revs->always_show_header = 1;
} else if (!strcmp(arg, "--no-abbrev")) {
revs->abbrev = 0;
} else if (!strcmp(arg, "--abbrev")) {
revs->abbrev = DEFAULT_ABBREV;
} else if (skip_prefix(arg, "--abbrev=", &optarg)) {
revs->abbrev = strtoul(optarg, NULL, 10);
if (revs->abbrev < MINIMUM_ABBREV)
revs->abbrev = MINIMUM_ABBREV;
else if (revs->abbrev > hexsz)
revs->abbrev = hexsz;
} else if (!strcmp(arg, "--abbrev-commit")) {
revs->abbrev_commit = 1;
revs->abbrev_commit_given = 1;
} else if (!strcmp(arg, "--no-abbrev-commit")) {
revs->abbrev_commit = 0;
} else if (!strcmp(arg, "--full-diff")) {
revs->diff = 1;
revs->full_diff = 1;
} else if (!strcmp(arg, "--full-history")) {
revs->simplify_history = 0;
} else if (!strcmp(arg, "--relative-date")) {
revs->date_mode.type = DATE_RELATIVE;
revs->date_mode_explicit = 1;
} else if ((argcount = parse_long_opt("date", argv, &optarg))) {
parse_date_format(optarg, &revs->date_mode);
revs->date_mode_explicit = 1;
return argcount;
} else if (!strcmp(arg, "--log-size")) {
revs->show_log_size = 1;
}
/*
* Grepping the commit log
*/
else if ((argcount = parse_long_opt("author", argv, &optarg))) {
add_header_grep(revs, GREP_HEADER_AUTHOR, optarg);
return argcount;
} else if ((argcount = parse_long_opt("committer", argv, &optarg))) {
add_header_grep(revs, GREP_HEADER_COMMITTER, optarg);
return argcount;
} else if ((argcount = parse_long_opt("grep-reflog", argv, &optarg))) {
add_header_grep(revs, GREP_HEADER_REFLOG, optarg);
return argcount;
} else if ((argcount = parse_long_opt("grep", argv, &optarg))) {
add_message_grep(revs, optarg);
return argcount;
} else if (!strcmp(arg, "--grep-debug")) {
revs->grep_filter.debug = 1;
} else if (!strcmp(arg, "--basic-regexp")) {
revs->grep_filter.pattern_type_option = GREP_PATTERN_TYPE_BRE;
} else if (!strcmp(arg, "--extended-regexp") || !strcmp(arg, "-E")) {
revs->grep_filter.pattern_type_option = GREP_PATTERN_TYPE_ERE;
} else if (!strcmp(arg, "--regexp-ignore-case") || !strcmp(arg, "-i")) {
revs->grep_filter.ignore_case = 1;
revs->diffopt.pickaxe_opts |= DIFF_PICKAXE_IGNORE_CASE;
} else if (!strcmp(arg, "--fixed-strings") || !strcmp(arg, "-F")) {
revs->grep_filter.pattern_type_option = GREP_PATTERN_TYPE_FIXED;
} else if (!strcmp(arg, "--perl-regexp") || !strcmp(arg, "-P")) {
revs->grep_filter.pattern_type_option = GREP_PATTERN_TYPE_PCRE;
} else if (!strcmp(arg, "--all-match")) {
revs->grep_filter.all_match = 1;
} else if (!strcmp(arg, "--invert-grep")) {
revs->invert_grep = 1;
} else if ((argcount = parse_long_opt("encoding", argv, &optarg))) {
if (strcmp(optarg, "none"))
git_log_output_encoding = xstrdup(optarg);
else
git_log_output_encoding = "";
return argcount;
} else if (!strcmp(arg, "--reverse")) {
revs->reverse ^= 1;
} else if (!strcmp(arg, "--children")) {
revs->children.name = "children";
revs->limited = 1;
} else if (!strcmp(arg, "--ignore-missing")) {
revs->ignore_missing = 1;
} else if (opt && opt->allow_exclude_promisor_objects &&
!strcmp(arg, "--exclude-promisor-objects")) {
if (fetch_if_missing)
BUG("exclude_promisor_objects can only be used when fetch_if_missing is 0");
revs->exclude_promisor_objects = 1;
} else {
int opts = diff_opt_parse(&revs->diffopt, argv, argc, revs->prefix);
if (!opts)
unkv[(*unkc)++] = arg;
return opts;
}
if (revs->graph && revs->track_linear)
die("--show-linear-break and --graph are incompatible");
return 1;
}
void parse_revision_opt(struct rev_info *revs, struct parse_opt_ctx_t *ctx,
const struct option *options,
const char * const usagestr[])
{
int n = handle_revision_opt(revs, ctx->argc, ctx->argv,
&ctx->cpidx, ctx->out, NULL);
if (n <= 0) {
error("unknown option `%s'", ctx->argv[0]);
usage_with_options(usagestr, options);
}
ctx->argv += n;
ctx->argc -= n;
}
static int for_each_bisect_ref(struct ref_store *refs, each_ref_fn fn,
void *cb_data, const char *term)
{
struct strbuf bisect_refs = STRBUF_INIT;
int status;
strbuf_addf(&bisect_refs, "refs/bisect/%s", term);
status = refs_for_each_fullref_in(refs, bisect_refs.buf, fn, cb_data, 0);
strbuf_release(&bisect_refs);
return status;
}
static int for_each_bad_bisect_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
{
return for_each_bisect_ref(refs, fn, cb_data, term_bad);
}
static int for_each_good_bisect_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
{
return for_each_bisect_ref(refs, fn, cb_data, term_good);
}
static int handle_revision_pseudo_opt(const char *submodule,
struct rev_info *revs,
int argc, const char **argv, int *flags)
{
const char *arg = argv[0];
const char *optarg;
struct ref_store *refs;
int argcount;
if (submodule) {
/*
* We need some something like get_submodule_worktrees()
* before we can go through all worktrees of a submodule,
* .e.g with adding all HEADs from --all, which is not
* supported right now, so stick to single worktree.
*/
if (!revs->single_worktree)
BUG("--single-worktree cannot be used together with submodule");
refs = get_submodule_ref_store(submodule);
} else
refs = get_main_ref_store(revs->repo);
/*
* NOTE!
*
* Commands like "git shortlog" will not accept the options below
* unless parse_revision_opt queues them (as opposed to erroring
* out).
*
* When implementing your new pseudo-option, remember to
* register it in the list at the top of handle_revision_opt.
*/
if (!strcmp(arg, "--all")) {
handle_refs(refs, revs, *flags, refs_for_each_ref);
handle_refs(refs, revs, *flags, refs_head_ref);
if (!revs->single_worktree) {
struct all_refs_cb cb;
init_all_refs_cb(&cb, revs, *flags);
other_head_refs(handle_one_ref, &cb);
}
clear_ref_exclusion(&revs->ref_excludes);
} else if (!strcmp(arg, "--branches")) {
handle_refs(refs, revs, *flags, refs_for_each_branch_ref);
clear_ref_exclusion(&revs->ref_excludes);
} else if (!strcmp(arg, "--bisect")) {
read_bisect_terms(&term_bad, &term_good);
handle_refs(refs, revs, *flags, for_each_bad_bisect_ref);
handle_refs(refs, revs, *flags ^ (UNINTERESTING | BOTTOM),
for_each_good_bisect_ref);
revs->bisect = 1;
} else if (!strcmp(arg, "--tags")) {
handle_refs(refs, revs, *flags, refs_for_each_tag_ref);
clear_ref_exclusion(&revs->ref_excludes);
} else if (!strcmp(arg, "--remotes")) {
handle_refs(refs, revs, *flags, refs_for_each_remote_ref);
clear_ref_exclusion(&revs->ref_excludes);
} else if ((argcount = parse_long_opt("glob", argv, &optarg))) {
struct all_refs_cb cb;
init_all_refs_cb(&cb, revs, *flags);
for_each_glob_ref(handle_one_ref, optarg, &cb);
clear_ref_exclusion(&revs->ref_excludes);
return argcount;
} else if ((argcount = parse_long_opt("exclude", argv, &optarg))) {
add_ref_exclusion(&revs->ref_excludes, optarg);
return argcount;
} else if (skip_prefix(arg, "--branches=", &optarg)) {
struct all_refs_cb cb;
init_all_refs_cb(&cb, revs, *flags);
for_each_glob_ref_in(handle_one_ref, optarg, "refs/heads/", &cb);
clear_ref_exclusion(&revs->ref_excludes);
} else if (skip_prefix(arg, "--tags=", &optarg)) {
struct all_refs_cb cb;
init_all_refs_cb(&cb, revs, *flags);
for_each_glob_ref_in(handle_one_ref, optarg, "refs/tags/", &cb);
clear_ref_exclusion(&revs->ref_excludes);
} else if (skip_prefix(arg, "--remotes=", &optarg)) {
struct all_refs_cb cb;
init_all_refs_cb(&cb, revs, *flags);
for_each_glob_ref_in(handle_one_ref, optarg, "refs/remotes/", &cb);
clear_ref_exclusion(&revs->ref_excludes);
} else if (!strcmp(arg, "--reflog")) {
add_reflogs_to_pending(revs, *flags);
} else if (!strcmp(arg, "--indexed-objects")) {
add_index_objects_to_pending(revs, *flags);
} else if (!strcmp(arg, "--alternate-refs")) {
add_alternate_refs_to_pending(revs, *flags);
} else if (!strcmp(arg, "--not")) {
*flags ^= UNINTERESTING | BOTTOM;
} else if (!strcmp(arg, "--no-walk")) {
revs->no_walk = REVISION_WALK_NO_WALK_SORTED;
} else if (skip_prefix(arg, "--no-walk=", &optarg)) {
/*
* Detached form ("--no-walk X" as opposed to "--no-walk=X")
* not allowed, since the argument is optional.
*/
if (!strcmp(optarg, "sorted"))
revs->no_walk = REVISION_WALK_NO_WALK_SORTED;
else if (!strcmp(optarg, "unsorted"))
revs->no_walk = REVISION_WALK_NO_WALK_UNSORTED;
else
return error("invalid argument to --no-walk");
} else if (!strcmp(arg, "--do-walk")) {
revs->no_walk = 0;
} else if (!strcmp(arg, "--single-worktree")) {
revs->single_worktree = 1;
} else {
return 0;
}
return 1;
}
static void NORETURN diagnose_missing_default(const char *def)
{
int flags;
const char *refname;
refname = resolve_ref_unsafe(def, 0, NULL, &flags);
if (!refname || !(flags & REF_ISSYMREF) || (flags & REF_ISBROKEN))
die(_("your current branch appears to be broken"));
skip_prefix(refname, "refs/heads/", &refname);
die(_("your current branch '%s' does not have any commits yet"),
refname);
}
/*
* Parse revision information, filling in the "rev_info" structure,
* and removing the used arguments from the argument list.
*
* Returns the number of arguments left that weren't recognized
* (which are also moved to the head of the argument list)
*/
int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct setup_revision_opt *opt)
{
int i, flags, left, seen_dashdash, got_rev_arg = 0, revarg_opt;
struct argv_array prune_data = ARGV_ARRAY_INIT;
const char *submodule = NULL;
int seen_end_of_options = 0;
if (opt)
submodule = opt->submodule;
/* First, search for "--" */
if (opt && opt->assume_dashdash) {
seen_dashdash = 1;
} else {
seen_dashdash = 0;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (strcmp(arg, "--"))
continue;
argv[i] = NULL;
argc = i;
if (argv[i + 1])
argv_array_pushv(&prune_data, argv + i + 1);
seen_dashdash = 1;
break;
}
}
/* Second, deal with arguments and options */
flags = 0;
revarg_opt = opt ? opt->revarg_opt : 0;
if (seen_dashdash)
revarg_opt |= REVARG_CANNOT_BE_FILENAME;
for (left = i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!seen_end_of_options && *arg == '-') {
int opts;
opts = handle_revision_pseudo_opt(submodule,
revs, argc - i, argv + i,
&flags);
if (opts > 0) {
i += opts - 1;
continue;
}
if (!strcmp(arg, "--stdin")) {
if (revs->disable_stdin) {
argv[left++] = arg;
continue;
}
if (revs->read_from_stdin++)
die("--stdin given twice?");
read_revisions_from_stdin(revs, &prune_data);
continue;
}
if (!strcmp(arg, "--end-of-options")) {
seen_end_of_options = 1;
continue;
}
opts = handle_revision_opt(revs, argc - i, argv + i,
&left, argv, opt);
if (opts > 0) {
i += opts - 1;
continue;
}
if (opts < 0)
exit(128);
continue;
}
if (handle_revision_arg(arg, revs, flags, revarg_opt)) {
int j;
if (seen_dashdash || *arg == '^')
die("bad revision '%s'", arg);
/* If we didn't have a "--":
* (1) all filenames must exist;
* (2) all rev-args must not be interpretable
* as a valid filename.
* but the latter we have checked in the main loop.
*/
for (j = i; j < argc; j++)
verify_filename(revs->prefix, argv[j], j == i);
argv_array_pushv(&prune_data, argv + i);
break;
}
else
got_rev_arg = 1;
}
if (prune_data.argc) {
/*
* If we need to introduce the magic "a lone ':' means no
* pathspec whatsoever", here is the place to do so.
*
* if (prune_data.nr == 1 && !strcmp(prune_data[0], ":")) {
* prune_data.nr = 0;
* prune_data.alloc = 0;
* free(prune_data.path);
* prune_data.path = NULL;
* } else {
* terminate prune_data.alloc with NULL and
* call init_pathspec() to set revs->prune_data here.
* }
*/
parse_pathspec(&revs->prune_data, 0, 0,
revs->prefix, prune_data.argv);
}
argv_array_clear(&prune_data);
if (revs->def == NULL)
revs->def = opt ? opt->def : NULL;
if (opt && opt->tweak)
opt->tweak(revs, opt);
if (revs->show_merge)
prepare_show_merge(revs);
if (revs->def && !revs->pending.nr && !revs->rev_input_given && !got_rev_arg) {
struct object_id oid;
struct object *object;
struct object_context oc;
if (get_oid_with_context(revs->repo, revs->def, 0, &oid, &oc))
diagnose_missing_default(revs->def);
object = get_reference(revs, revs->def, &oid, 0);
add_pending_object_with_mode(revs, object, revs->def, oc.mode);
}
/* Did the user ask for any diff output? Run the diff! */
if (revs->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT)
revs->diff = 1;
/* Pickaxe, diff-filter and rename following need diffs */
if ((revs->diffopt.pickaxe_opts & DIFF_PICKAXE_KINDS_MASK) ||
revs->diffopt.filter ||
revs->diffopt.flags.follow_renames)
revs->diff = 1;
if (revs->diffopt.objfind)
revs->simplify_history = 0;
if (revs->topo_order && !generation_numbers_enabled(the_repository))
revs->limited = 1;
if (revs->prune_data.nr) {
copy_pathspec(&revs->pruning.pathspec, &revs->prune_data);
/* Can't prune commits with rename following: the paths change.. */
if (!revs->diffopt.flags.follow_renames)
revs->prune = 1;
if (!revs->full_diff)
copy_pathspec(&revs->diffopt.pathspec,
&revs->prune_data);
}
if (revs->combine_merges)
revs->ignore_merges = 0;
if (revs->combined_all_paths && !revs->combine_merges)
die("--combined-all-paths makes no sense without -c or --cc");
revs->diffopt.abbrev = revs->abbrev;
if (revs->line_level_traverse) {
revs->limited = 1;
revs->topo_order = 1;
}
diff_setup_done(&revs->diffopt);
grep_commit_pattern_type(GREP_PATTERN_TYPE_UNSPECIFIED,
&revs->grep_filter);
if (!is_encoding_utf8(get_log_output_encoding()))
revs->grep_filter.ignore_locale = 1;
compile_grep_patterns(&revs->grep_filter);
if (revs->reverse && revs->reflog_info)
die("cannot combine --reverse with --walk-reflogs");
if (revs->reflog_info && revs->limited)
die("cannot combine --walk-reflogs with history-limiting options");
if (revs->rewrite_parents && revs->children.name)
die("cannot combine --parents and --children");
/*
* Limitations on the graph functionality
*/
if (revs->reverse && revs->graph)
die("cannot combine --reverse with --graph");
if (revs->reflog_info && revs->graph)
die("cannot combine --walk-reflogs with --graph");
if (revs->no_walk && revs->graph)
die("cannot combine --no-walk with --graph");
if (!revs->reflog_info && revs->grep_filter.use_reflog_filter)
die("cannot use --grep-reflog without --walk-reflogs");
if (revs->first_parent_only && revs->bisect)
die(_("--first-parent is incompatible with --bisect"));
if (revs->line_level_traverse &&
(revs->diffopt.output_format & ~(DIFF_FORMAT_PATCH | DIFF_FORMAT_NO_OUTPUT)))
die(_("-L does not yet support diff formats besides -p and -s"));
if (revs->expand_tabs_in_log < 0)
revs->expand_tabs_in_log = revs->expand_tabs_in_log_default;
return left;
}
static void add_child(struct rev_info *revs, struct commit *parent, struct commit *child)
{
struct commit_list *l = xcalloc(1, sizeof(*l));
l->item = child;
l->next = add_decoration(&revs->children, &parent->object, l);
}
static int remove_duplicate_parents(struct rev_info *revs, struct commit *commit)
{
struct treesame_state *ts = lookup_decoration(&revs->treesame, &commit->object);
struct commit_list **pp, *p;
int surviving_parents;
/* Examine existing parents while marking ones we have seen... */
pp = &commit->parents;
surviving_parents = 0;
while ((p = *pp) != NULL) {
struct commit *parent = p->item;
if (parent->object.flags & TMP_MARK) {
*pp = p->next;
if (ts)
compact_treesame(revs, commit, surviving_parents);
continue;
}
parent->object.flags |= TMP_MARK;
surviving_parents++;
pp = &p->next;
}
/* clear the temporary mark */
for (p = commit->parents; p; p = p->next) {
p->item->object.flags &= ~TMP_MARK;
}
/* no update_treesame() - removing duplicates can't affect TREESAME */
return surviving_parents;
}
struct merge_simplify_state {
struct commit *simplified;
};
static struct merge_simplify_state *locate_simplify_state(struct rev_info *revs, struct commit *commit)
{
struct merge_simplify_state *st;
st = lookup_decoration(&revs->merge_simplification, &commit->object);
if (!st) {
st = xcalloc(1, sizeof(*st));
add_decoration(&revs->merge_simplification, &commit->object, st);
}
return st;
}
static int mark_redundant_parents(struct commit *commit)
{
struct commit_list *h = reduce_heads(commit->parents);
int i = 0, marked = 0;
struct commit_list *po, *pn;
/* Want these for sanity-checking only */
int orig_cnt = commit_list_count(commit->parents);
int cnt = commit_list_count(h);
/*
* Not ready to remove items yet, just mark them for now, based
* on the output of reduce_heads(). reduce_heads outputs the reduced
* set in its original order, so this isn't too hard.
*/
po = commit->parents;
pn = h;
while (po) {
if (pn && po->item == pn->item) {
pn = pn->next;
i++;
} else {
po->item->object.flags |= TMP_MARK;
marked++;
}
po=po->next;
}
if (i != cnt || cnt+marked != orig_cnt)
die("mark_redundant_parents %d %d %d %d", orig_cnt, cnt, i, marked);
free_commit_list(h);
return marked;
}
static int mark_treesame_root_parents(struct commit *commit)
{
struct commit_list *p;
int marked = 0;
for (p = commit->parents; p; p = p->next) {
struct commit *parent = p->item;
if (!parent->parents && (parent->object.flags & TREESAME)) {
parent->object.flags |= TMP_MARK;
marked++;
}
}
return marked;
}
/*
* Awkward naming - this means one parent we are TREESAME to.
* cf mark_treesame_root_parents: root parents that are TREESAME (to an
* empty tree). Better name suggestions?
*/
static int leave_one_treesame_to_parent(struct rev_info *revs, struct commit *commit)
{
struct treesame_state *ts = lookup_decoration(&revs->treesame, &commit->object);
struct commit *unmarked = NULL, *marked = NULL;
struct commit_list *p;
unsigned n;
for (p = commit->parents, n = 0; p; p = p->next, n++) {
if (ts->treesame[n]) {
if (p->item->object.flags & TMP_MARK) {
if (!marked)
marked = p->item;
} else {
if (!unmarked) {
unmarked = p->item;
break;
}
}
}
}
/*
* If we are TREESAME to a marked-for-deletion parent, but not to any
* unmarked parents, unmark the first TREESAME parent. This is the
* parent that the default simplify_history==1 scan would have followed,
* and it doesn't make sense to omit that path when asking for a
* simplified full history. Retaining it improves the chances of
* understanding odd missed merges that took an old version of a file.
*
* Example:
*
* I--------*X A modified the file, but mainline merge X used
* \ / "-s ours", so took the version from I. X is
* `-*A--' TREESAME to I and !TREESAME to A.
*
* Default log from X would produce "I". Without this check,
* --full-history --simplify-merges would produce "I-A-X", showing
* the merge commit X and that it changed A, but not making clear that
* it had just taken the I version. With this check, the topology above
* is retained.
*
* Note that it is possible that the simplification chooses a different
* TREESAME parent from the default, in which case this test doesn't
* activate, and we _do_ drop the default parent. Example:
*
* I------X A modified the file, but it was reverted in B,
* \ / meaning mainline merge X is TREESAME to both
* *A-*B parents.
*
* Default log would produce "I" by following the first parent;
* --full-history --simplify-merges will produce "I-A-B". But this is a
* reasonable result - it presents a logical full history leading from
* I to X, and X is not an important merge.
*/
if (!unmarked && marked) {
marked->object.flags &= ~TMP_MARK;
return 1;
}
return 0;
}
static int remove_marked_parents(struct rev_info *revs, struct commit *commit)
{
struct commit_list **pp, *p;
int nth_parent, removed = 0;
pp = &commit->parents;
nth_parent = 0;
while ((p = *pp) != NULL) {
struct commit *parent = p->item;
if (parent->object.flags & TMP_MARK) {
parent->object.flags &= ~TMP_MARK;
*pp = p->next;
free(p);
removed++;
compact_treesame(revs, commit, nth_parent);
continue;
}
pp = &p->next;
nth_parent++;
}
/* Removing parents can only increase TREESAMEness */
if (removed && !(commit->object.flags & TREESAME))
update_treesame(revs, commit);
return nth_parent;
}
static struct commit_list **simplify_one(struct rev_info *revs, struct commit *commit, struct commit_list **tail)
{
struct commit_list *p;
struct commit *parent;
struct merge_simplify_state *st, *pst;
int cnt;
st = locate_simplify_state(revs, commit);
/*
* Have we handled this one?
*/
if (st->simplified)
return tail;
/*
* An UNINTERESTING commit simplifies to itself, so does a
* root commit. We do not rewrite parents of such commit
* anyway.
*/
if ((commit->object.flags & UNINTERESTING) || !commit->parents) {
st->simplified = commit;
return tail;
}
/*
* Do we know what commit all of our parents that matter
* should be rewritten to? Otherwise we are not ready to
* rewrite this one yet.
*/
for (cnt = 0, p = commit->parents; p; p = p->next) {
pst = locate_simplify_state(revs, p->item);
if (!pst->simplified) {
tail = &commit_list_insert(p->item, tail)->next;
cnt++;
}
if (revs->first_parent_only)
break;
}
if (cnt) {
tail = &commit_list_insert(commit, tail)->next;
return tail;
}
/*
* Rewrite our list of parents. Note that this cannot
* affect our TREESAME flags in any way - a commit is
* always TREESAME to its simplification.
*/
for (p = commit->parents; p; p = p->next) {
pst = locate_simplify_state(revs, p->item);
p->item = pst->simplified;
if (revs->first_parent_only)
break;
}
if (revs->first_parent_only)
cnt = 1;
else
cnt = remove_duplicate_parents(revs, commit);
/*
* It is possible that we are a merge and one side branch
* does not have any commit that touches the given paths;
* in such a case, the immediate parent from that branch
* will be rewritten to be the merge base.
*
* o----X X: the commit we are looking at;
* / / o: a commit that touches the paths;
* ---o----'
*
* Further, a merge of an independent branch that doesn't
* touch the path will reduce to a treesame root parent:
*
* ----o----X X: the commit we are looking at;
* / o: a commit that touches the paths;
* r r: a root commit not touching the paths
*
* Detect and simplify both cases.
*/
if (1 < cnt) {
int marked = mark_redundant_parents(commit);
marked += mark_treesame_root_parents(commit);
if (marked)
marked -= leave_one_treesame_to_parent(revs, commit);
if (marked)
cnt = remove_marked_parents(revs, commit);
}
/*
* A commit simplifies to itself if it is a root, if it is
* UNINTERESTING, if it touches the given paths, or if it is a
* merge and its parents don't simplify to one relevant commit
* (the first two cases are already handled at the beginning of
* this function).
*
* Otherwise, it simplifies to what its sole relevant parent
* simplifies to.
*/
if (!cnt ||
(commit->object.flags & UNINTERESTING) ||
!(commit->object.flags & TREESAME) ||
(parent = one_relevant_parent(revs, commit->parents)) == NULL)
st->simplified = commit;
else {
pst = locate_simplify_state(revs, parent);
st->simplified = pst->simplified;
}
return tail;
}
static void simplify_merges(struct rev_info *revs)
{
struct commit_list *list, *next;
struct commit_list *yet_to_do, **tail;
struct commit *commit;
if (!revs->prune)
return;
/* feed the list reversed */
yet_to_do = NULL;
for (list = revs->commits; list; list = next) {
commit = list->item;
next = list->next;
/*
* Do not free(list) here yet; the original list
* is used later in this function.
*/
commit_list_insert(commit, &yet_to_do);
}
while (yet_to_do) {
list = yet_to_do;
yet_to_do = NULL;
tail = &yet_to_do;
while (list) {
commit = pop_commit(&list);
tail = simplify_one(revs, commit, tail);
}
}
/* clean up the result, removing the simplified ones */
list = revs->commits;
revs->commits = NULL;
tail = &revs->commits;
while (list) {
struct merge_simplify_state *st;
commit = pop_commit(&list);
st = locate_simplify_state(revs, commit);
if (st->simplified == commit)
tail = &commit_list_insert(commit, tail)->next;
}
}
static void set_children(struct rev_info *revs)
{
struct commit_list *l;
for (l = revs->commits; l; l = l->next) {
struct commit *commit = l->item;
struct commit_list *p;
for (p = commit->parents; p; p = p->next)
add_child(revs, p->item, commit);
}
}
void reset_revision_walk(void)
{
clear_object_flags(SEEN | ADDED | SHOWN);
}
static int mark_uninteresting(const struct object_id *oid,
struct packed_git *pack,
uint32_t pos,
void *cb)
{
struct rev_info *revs = cb;
struct object *o = parse_object(revs->repo, oid);
o->flags |= UNINTERESTING | SEEN;
return 0;
}
define_commit_slab(indegree_slab, int);
define_commit_slab(author_date_slab, timestamp_t);
struct topo_walk_info {
uint32_t min_generation;
struct prio_queue explore_queue;
struct prio_queue indegree_queue;
struct prio_queue topo_queue;
struct indegree_slab indegree;
struct author_date_slab author_date;
};
static inline void test_flag_and_insert(struct prio_queue *q, struct commit *c, int flag)
{
if (c->object.flags & flag)
return;
c->object.flags |= flag;
prio_queue_put(q, c);
}
static void explore_walk_step(struct rev_info *revs)
{
struct topo_walk_info *info = revs->topo_walk_info;
struct commit_list *p;
struct commit *c = prio_queue_get(&info->explore_queue);
if (!c)
return;
if (parse_commit_gently(c, 1) < 0)
return;
if (revs->sort_order == REV_SORT_BY_AUTHOR_DATE)
record_author_date(&info->author_date, c);
if (revs->max_age != -1 && (c->date < revs->max_age))
c->object.flags |= UNINTERESTING;
if (process_parents(revs, c, NULL, NULL) < 0)
return;
if (c->object.flags & UNINTERESTING)
mark_parents_uninteresting(c);
for (p = c->parents; p; p = p->next)
test_flag_and_insert(&info->explore_queue, p->item, TOPO_WALK_EXPLORED);
}
static void explore_to_depth(struct rev_info *revs,
uint32_t gen_cutoff)
{
struct topo_walk_info *info = revs->topo_walk_info;
struct commit *c;
while ((c = prio_queue_peek(&info->explore_queue)) &&
c->generation >= gen_cutoff)
explore_walk_step(revs);
}
static void indegree_walk_step(struct rev_info *revs)
{
struct commit_list *p;
struct topo_walk_info *info = revs->topo_walk_info;
struct commit *c = prio_queue_get(&info->indegree_queue);
if (!c)
return;
if (parse_commit_gently(c, 1) < 0)
return;
explore_to_depth(revs, c->generation);
for (p = c->parents; p; p = p->next) {
struct commit *parent = p->item;
int *pi = indegree_slab_at(&info->indegree, parent);
if (*pi)
(*pi)++;
else
*pi = 2;
test_flag_and_insert(&info->indegree_queue, parent, TOPO_WALK_INDEGREE);
if (revs->first_parent_only)
return;
}
}
static void compute_indegrees_to_depth(struct rev_info *revs,
uint32_t gen_cutoff)
{
struct topo_walk_info *info = revs->topo_walk_info;
struct commit *c;
while ((c = prio_queue_peek(&info->indegree_queue)) &&
c->generation >= gen_cutoff)
indegree_walk_step(revs);
}
static void init_topo_walk(struct rev_info *revs)
{
struct topo_walk_info *info;
struct commit_list *list;
revs->topo_walk_info = xmalloc(sizeof(struct topo_walk_info));
info = revs->topo_walk_info;
memset(info, 0, sizeof(struct topo_walk_info));
init_indegree_slab(&info->indegree);
memset(&info->explore_queue, 0, sizeof(info->explore_queue));
memset(&info->indegree_queue, 0, sizeof(info->indegree_queue));
memset(&info->topo_queue, 0, sizeof(info->topo_queue));
switch (revs->sort_order) {
default: /* REV_SORT_IN_GRAPH_ORDER */
info->topo_queue.compare = NULL;
break;
case REV_SORT_BY_COMMIT_DATE:
info->topo_queue.compare = compare_commits_by_commit_date;
break;
case REV_SORT_BY_AUTHOR_DATE:
init_author_date_slab(&info->author_date);
info->topo_queue.compare = compare_commits_by_author_date;
info->topo_queue.cb_data = &info->author_date;
break;
}
info->explore_queue.compare = compare_commits_by_gen_then_commit_date;
info->indegree_queue.compare = compare_commits_by_gen_then_commit_date;
info->min_generation = GENERATION_NUMBER_INFINITY;
for (list = revs->commits; list; list = list->next) {
struct commit *c = list->item;
if (parse_commit_gently(c, 1))
continue;
test_flag_and_insert(&info->explore_queue, c, TOPO_WALK_EXPLORED);
test_flag_and_insert(&info->indegree_queue, c, TOPO_WALK_INDEGREE);
if (c->generation < info->min_generation)
info->min_generation = c->generation;
*(indegree_slab_at(&info->indegree, c)) = 1;
if (revs->sort_order == REV_SORT_BY_AUTHOR_DATE)
record_author_date(&info->author_date, c);
}
compute_indegrees_to_depth(revs, info->min_generation);
for (list = revs->commits; list; list = list->next) {
struct commit *c = list->item;
if (*(indegree_slab_at(&info->indegree, c)) == 1)
prio_queue_put(&info->topo_queue, c);
}
/*
* This is unfortunate; the initial tips need to be shown
* in the order given from the revision traversal machinery.
*/
if (revs->sort_order == REV_SORT_IN_GRAPH_ORDER)
prio_queue_reverse(&info->topo_queue);
}
static struct commit *next_topo_commit(struct rev_info *revs)
{
struct commit *c;
struct topo_walk_info *info = revs->topo_walk_info;
/* pop next off of topo_queue */
c = prio_queue_get(&info->topo_queue);
if (c)
*(indegree_slab_at(&info->indegree, c)) = 0;
return c;
}
static void expand_topo_walk(struct rev_info *revs, struct commit *commit)
{
struct commit_list *p;
struct topo_walk_info *info = revs->topo_walk_info;
if (process_parents(revs, commit, NULL, NULL) < 0) {
if (!revs->ignore_missing_links)
die("Failed to traverse parents of commit %s",
oid_to_hex(&commit->object.oid));
}
for (p = commit->parents; p; p = p->next) {
struct commit *parent = p->item;
int *pi;
if (parent->object.flags & UNINTERESTING)
continue;
if (parse_commit_gently(parent, 1) < 0)
continue;
if (parent->generation < info->min_generation) {
info->min_generation = parent->generation;
compute_indegrees_to_depth(revs, info->min_generation);
}
pi = indegree_slab_at(&info->indegree, parent);
(*pi)--;
if (*pi == 1)
prio_queue_put(&info->topo_queue, parent);
if (revs->first_parent_only)
return;
}
}
int prepare_revision_walk(struct rev_info *revs)
{
int i;
struct object_array old_pending;
struct commit_list **next = &revs->commits;
memcpy(&old_pending, &revs->pending, sizeof(old_pending));
revs->pending.nr = 0;
revs->pending.alloc = 0;
revs->pending.objects = NULL;
for (i = 0; i < old_pending.nr; i++) {
struct object_array_entry *e = old_pending.objects + i;
struct commit *commit = handle_commit(revs, e);
if (commit) {
if (!(commit->object.flags & SEEN)) {
commit->object.flags |= SEEN;
next = commit_list_append(commit, next);
}
}
}
object_array_clear(&old_pending);
/* Signal whether we need per-parent treesame decoration */
if (revs->simplify_merges ||
(revs->limited && limiting_can_increase_treesame(revs)))
revs->treesame.name = "treesame";
if (revs->exclude_promisor_objects) {
for_each_packed_object(mark_uninteresting, revs,
FOR_EACH_OBJECT_PROMISOR_ONLY);
}
if (revs->no_walk != REVISION_WALK_NO_WALK_UNSORTED)
commit_list_sort_by_date(&revs->commits);
if (revs->no_walk)
return 0;
if (revs->limited) {
if (limit_list(revs) < 0)
return -1;
if (revs->topo_order)
sort_in_topological_order(&revs->commits, revs->sort_order);
} else if (revs->topo_order)
init_topo_walk(revs);
if (revs->line_level_traverse)
line_log_filter(revs);
if (revs->simplify_merges)
simplify_merges(revs);
if (revs->children.name)
set_children(revs);
return 0;
}
static enum rewrite_result rewrite_one_1(struct rev_info *revs,
struct commit **pp,
struct prio_queue *queue)
{
for (;;) {
struct commit *p = *pp;
if (!revs->limited)
if (process_parents(revs, p, NULL, queue) < 0)
return rewrite_one_error;
if (p->object.flags & UNINTERESTING)
return rewrite_one_ok;
if (!(p->object.flags & TREESAME))
return rewrite_one_ok;
if (!p->parents)
return rewrite_one_noparents;
if ((p = one_relevant_parent(revs, p->parents)) == NULL)
return rewrite_one_ok;
*pp = p;
}
}
static void merge_queue_into_list(struct prio_queue *q, struct commit_list **list)
{
while (q->nr) {
struct commit *item = prio_queue_peek(q);
struct commit_list *p = *list;
if (p && p->item->date >= item->date)
list = &p->next;
else {
p = commit_list_insert(item, list);
list = &p->next; /* skip newly added item */
prio_queue_get(q); /* pop item */
}
}
}
static enum rewrite_result rewrite_one(struct rev_info *revs, struct commit **pp)
{
struct prio_queue queue = { compare_commits_by_commit_date };
enum rewrite_result ret = rewrite_one_1(revs, pp, &queue);
merge_queue_into_list(&queue, &revs->commits);
clear_prio_queue(&queue);
return ret;
}
int rewrite_parents(struct rev_info *revs, struct commit *commit,
rewrite_parent_fn_t rewrite_parent)
{
struct commit_list **pp = &commit->parents;
while (*pp) {
struct commit_list *parent = *pp;
switch (rewrite_parent(revs, &parent->item)) {
case rewrite_one_ok:
break;
case rewrite_one_noparents:
*pp = parent->next;
continue;
case rewrite_one_error:
return -1;
}
pp = &parent->next;
}
remove_duplicate_parents(revs, commit);
return 0;
}
static int commit_rewrite_person(struct strbuf *buf, const char *what, struct string_list *mailmap)
{
char *person, *endp;
size_t len, namelen, maillen;
const char *name;
const char *mail;
struct ident_split ident;
person = strstr(buf->buf, what);
if (!person)
return 0;
person += strlen(what);
endp = strchr(person, '\n');
if (!endp)
return 0;
len = endp - person;
if (split_ident_line(&ident, person, len))
return 0;
mail = ident.mail_begin;
maillen = ident.mail_end - ident.mail_begin;
name = ident.name_begin;
namelen = ident.name_end - ident.name_begin;
if (map_user(mailmap, &mail, &maillen, &name, &namelen)) {
struct strbuf namemail = STRBUF_INIT;
strbuf_addf(&namemail, "%.*s <%.*s>",
(int)namelen, name, (int)maillen, mail);
strbuf_splice(buf, ident.name_begin - buf->buf,
ident.mail_end - ident.name_begin + 1,
namemail.buf, namemail.len);
strbuf_release(&namemail);
return 1;
}
return 0;
}
static int commit_match(struct commit *commit, struct rev_info *opt)
{
int retval;
const char *encoding;
const char *message;
struct strbuf buf = STRBUF_INIT;
if (!opt->grep_filter.pattern_list && !opt->grep_filter.header_list)
return 1;
/* Prepend "fake" headers as needed */
if (opt->grep_filter.use_reflog_filter) {
strbuf_addstr(&buf, "reflog ");
get_reflog_message(&buf, opt->reflog_info);
strbuf_addch(&buf, '\n');
}
/*
* We grep in the user's output encoding, under the assumption that it
* is the encoding they are most likely to write their grep pattern
* for. In addition, it means we will match the "notes" encoding below,
* so we will not end up with a buffer that has two different encodings
* in it.
*/
encoding = get_log_output_encoding();
message = logmsg_reencode(commit, NULL, encoding);
/* Copy the commit to temporary if we are using "fake" headers */
if (buf.len)
strbuf_addstr(&buf, message);
if (opt->grep_filter.header_list && opt->mailmap) {
if (!buf.len)
strbuf_addstr(&buf, message);
commit_rewrite_person(&buf, "\nauthor ", opt->mailmap);
commit_rewrite_person(&buf, "\ncommitter ", opt->mailmap);
}
/* Append "fake" message parts as needed */
if (opt->show_notes) {
if (!buf.len)
strbuf_addstr(&buf, message);
format_display_notes(&commit->object.oid, &buf, encoding, 1);
}
/*
* Find either in the original commit message, or in the temporary.
* Note that we cast away the constness of "message" here. It is
* const because it may come from the cached commit buffer. That's OK,
* because we know that it is modifiable heap memory, and that while
* grep_buffer may modify it for speed, it will restore any
* changes before returning.
*/
if (buf.len)
retval = grep_buffer(&opt->grep_filter, buf.buf, buf.len);
else
retval = grep_buffer(&opt->grep_filter,
(char *)message, strlen(message));
strbuf_release(&buf);
unuse_commit_buffer(commit, message);
return opt->invert_grep ? !retval : retval;
}
static inline int want_ancestry(const struct rev_info *revs)
{
return (revs->rewrite_parents || revs->children.name);
}
/*
* Return a timestamp to be used for --since/--until comparisons for this
* commit, based on the revision options.
*/
static timestamp_t comparison_date(const struct rev_info *revs,
struct commit *commit)
{
return revs->reflog_info ?
get_reflog_timestamp(revs->reflog_info) :
commit->date;
}
enum commit_action get_commit_action(struct rev_info *revs, struct commit *commit)
{
if (commit->object.flags & SHOWN)
return commit_ignore;
if (revs->unpacked && has_object_pack(&commit->object.oid))
return commit_ignore;
if (commit->object.flags & UNINTERESTING)
return commit_ignore;
if (revs->min_age != -1 &&
comparison_date(revs, commit) > revs->min_age)
return commit_ignore;
if (revs->min_parents || (revs->max_parents >= 0)) {
int n = commit_list_count(commit->parents);
if ((n < revs->min_parents) ||
((revs->max_parents >= 0) && (n > revs->max_parents)))
return commit_ignore;
}
if (!commit_match(commit, revs))
return commit_ignore;
if (revs->prune && revs->dense) {
/* Commit without changes? */
if (commit->object.flags & TREESAME) {
int n;
struct commit_list *p;
/* drop merges unless we want parenthood */
if (!want_ancestry(revs))
return commit_ignore;
/*
* If we want ancestry, then need to keep any merges
* between relevant commits to tie together topology.
* For consistency with TREESAME and simplification
* use "relevant" here rather than just INTERESTING,
* to treat bottom commit(s) as part of the topology.
*/
for (n = 0, p = commit->parents; p; p = p->next)
if (relevant_commit(p->item))
if (++n >= 2)
return commit_show;
return commit_ignore;
}
}
return commit_show;
}
define_commit_slab(saved_parents, struct commit_list *);
#define EMPTY_PARENT_LIST ((struct commit_list *)-1)
/*
* You may only call save_parents() once per commit (this is checked
* for non-root commits).
*/
static void save_parents(struct rev_info *revs, struct commit *commit)
{
struct commit_list **pp;
if (!revs->saved_parents_slab) {
revs->saved_parents_slab = xmalloc(sizeof(struct saved_parents));
init_saved_parents(revs->saved_parents_slab);
}
pp = saved_parents_at(revs->saved_parents_slab, commit);
/*
* When walking with reflogs, we may visit the same commit
* several times: once for each appearance in the reflog.
*
* In this case, save_parents() will be called multiple times.
* We want to keep only the first set of parents. We need to
* store a sentinel value for an empty (i.e., NULL) parent
* list to distinguish it from a not-yet-saved list, however.
*/
if (*pp)
return;
if (commit->parents)
*pp = copy_commit_list(commit->parents);
else
*pp = EMPTY_PARENT_LIST;
}
static void free_saved_parents(struct rev_info *revs)
{
if (revs->saved_parents_slab)
clear_saved_parents(revs->saved_parents_slab);
}
struct commit_list *get_saved_parents(struct rev_info *revs, const struct commit *commit)
{
struct commit_list *parents;
if (!revs->saved_parents_slab)
return commit->parents;
parents = *saved_parents_at(revs->saved_parents_slab, commit);
if (parents == EMPTY_PARENT_LIST)
return NULL;
return parents;
}
enum commit_action simplify_commit(struct rev_info *revs, struct commit *commit)
{
enum commit_action action = get_commit_action(revs, commit);
if (action == commit_show &&
revs->prune && revs->dense && want_ancestry(revs)) {
/*
* --full-diff on simplified parents is no good: it
* will show spurious changes from the commits that
* were elided. So we save the parents on the side
* when --full-diff is in effect.
*/
if (revs->full_diff)
save_parents(revs, commit);
if (rewrite_parents(revs, commit, rewrite_one) < 0)
return commit_error;
}
return action;
}
static void track_linear(struct rev_info *revs, struct commit *commit)
{
if (revs->track_first_time) {
revs->linear = 1;
revs->track_first_time = 0;
} else {
struct commit_list *p;
for (p = revs->previous_parents; p; p = p->next)
if (p->item == NULL || /* first commit */
oideq(&p->item->object.oid, &commit->object.oid))
break;
revs->linear = p != NULL;
}
if (revs->reverse) {
if (revs->linear)
commit->object.flags |= TRACK_LINEAR;
}
free_commit_list(revs->previous_parents);
revs->previous_parents = copy_commit_list(commit->parents);
}
static struct commit *get_revision_1(struct rev_info *revs)
{
while (1) {
struct commit *commit;
if (revs->reflog_info)
commit = next_reflog_entry(revs->reflog_info);
else if (revs->topo_walk_info)
commit = next_topo_commit(revs);
else
commit = pop_commit(&revs->commits);
if (!commit)
return NULL;
if (revs->reflog_info)
commit->object.flags &= ~(ADDED | SEEN | SHOWN);
/*
* If we haven't done the list limiting, we need to look at
* the parents here. We also need to do the date-based limiting
* that we'd otherwise have done in limit_list().
*/
if (!revs->limited) {
if (revs->max_age != -1 &&
comparison_date(revs, commit) < revs->max_age)
continue;
if (revs->reflog_info)
try_to_simplify_commit(revs, commit);
else if (revs->topo_walk_info)
expand_topo_walk(revs, commit);
else if (process_parents(revs, commit, &revs->commits, NULL) < 0) {
if (!revs->ignore_missing_links)
die("Failed to traverse parents of commit %s",
oid_to_hex(&commit->object.oid));
}
}
switch (simplify_commit(revs, commit)) {
case commit_ignore:
continue;
case commit_error:
die("Failed to simplify parents of commit %s",
oid_to_hex(&commit->object.oid));
default:
if (revs->track_linear)
track_linear(revs, commit);
return commit;
}
}
}
/*
* Return true for entries that have not yet been shown. (This is an
* object_array_each_func_t.)
*/
static int entry_unshown(struct object_array_entry *entry, void *cb_data_unused)
{
return !(entry->item->flags & SHOWN);
}
/*
* If array is on the verge of a realloc, garbage-collect any entries
* that have already been shown to try to free up some space.
*/
static void gc_boundary(struct object_array *array)
{
if (array->nr == array->alloc)
object_array_filter(array, entry_unshown, NULL);
}
static void create_boundary_commit_list(struct rev_info *revs)
{
unsigned i;
struct commit *c;
struct object_array *array = &revs->boundary_commits;
struct object_array_entry *objects = array->objects;
/*
* If revs->commits is non-NULL at this point, an error occurred in
* get_revision_1(). Ignore the error and continue printing the
* boundary commits anyway. (This is what the code has always
* done.)
*/
if (revs->commits) {
free_commit_list(revs->commits);
revs->commits = NULL;
}
/*
* Put all of the actual boundary commits from revs->boundary_commits
* into revs->commits
*/
for (i = 0; i < array->nr; i++) {
c = (struct commit *)(objects[i].item);
if (!c)
continue;
if (!(c->object.flags & CHILD_SHOWN))
continue;
if (c->object.flags & (SHOWN | BOUNDARY))
continue;
c->object.flags |= BOUNDARY;
commit_list_insert(c, &revs->commits);
}
/*
* If revs->topo_order is set, sort the boundary commits
* in topological order
*/
sort_in_topological_order(&revs->commits, revs->sort_order);
}
static struct commit *get_revision_internal(struct rev_info *revs)
{
struct commit *c = NULL;
struct commit_list *l;
if (revs->boundary == 2) {
/*
* All of the normal commits have already been returned,
* and we are now returning boundary commits.
* create_boundary_commit_list() has populated
* revs->commits with the remaining commits to return.
*/
c = pop_commit(&revs->commits);
if (c)
c->object.flags |= SHOWN;
return c;
}
/*
* If our max_count counter has reached zero, then we are done. We
* don't simply return NULL because we still might need to show
* boundary commits. But we want to avoid calling get_revision_1, which
* might do a considerable amount of work finding the next commit only
* for us to throw it away.
*
* If it is non-zero, then either we don't have a max_count at all
* (-1), or it is still counting, in which case we decrement.
*/
if (revs->max_count) {
c = get_revision_1(revs);
if (c) {
while (revs->skip_count > 0) {
revs->skip_count--;
c = get_revision_1(revs);
if (!c)
break;
}
}
if (revs->max_count > 0)
revs->max_count--;
}
if (c)
c->object.flags |= SHOWN;
if (!revs->boundary)
return c;
if (!c) {
/*
* get_revision_1() runs out the commits, and
* we are done computing the boundaries.
* switch to boundary commits output mode.
*/
revs->boundary = 2;
/*
* Update revs->commits to contain the list of
* boundary commits.
*/
create_boundary_commit_list(revs);
return get_revision_internal(revs);
}
/*
* boundary commits are the commits that are parents of the
* ones we got from get_revision_1() but they themselves are
* not returned from get_revision_1(). Before returning
* 'c', we need to mark its parents that they could be boundaries.
*/
for (l = c->parents; l; l = l->next) {
struct object *p;
p = &(l->item->object);
if (p->flags & (CHILD_SHOWN | SHOWN))
continue;
p->flags |= CHILD_SHOWN;
gc_boundary(&revs->boundary_commits);
add_object_array(p, NULL, &revs->boundary_commits);
}
return c;
}
struct commit *get_revision(struct rev_info *revs)
{
struct commit *c;
struct commit_list *reversed;
if (revs->reverse) {
reversed = NULL;
while ((c = get_revision_internal(revs)))
commit_list_insert(c, &reversed);
revs->commits = reversed;
revs->reverse = 0;
revs->reverse_output_stage = 1;
}
if (revs->reverse_output_stage) {
c = pop_commit(&revs->commits);
if (revs->track_linear)
revs->linear = !!(c && c->object.flags & TRACK_LINEAR);
return c;
}
c = get_revision_internal(revs);
if (c && revs->graph)
graph_update(revs->graph, c);
if (!c) {
free_saved_parents(revs);
if (revs->previous_parents) {
free_commit_list(revs->previous_parents);
revs->previous_parents = NULL;
}
}
return c;
}
char *get_revision_mark(const struct rev_info *revs, const struct commit *commit)
{
if (commit->object.flags & BOUNDARY)
return "-";
else if (commit->object.flags & UNINTERESTING)
return "^";
else if (commit->object.flags & PATCHSAME)
return "=";
else if (!revs || revs->left_right) {
if (commit->object.flags & SYMMETRIC_LEFT)
return "<";
else
return ">";
} else if (revs->graph)
return "*";
else if (revs->cherry_mark)
return "+";
return "";
}
void put_revision_mark(const struct rev_info *revs, const struct commit *commit)
{
char *mark = get_revision_mark(revs, commit);
if (!strlen(mark))
return;
fputs(mark, stdout);
putchar(' ');
}