Merge branch 'jt/interpret-branch-name-fallback'
"git status" has trouble showing where it came from by interpreting
reflog entries that recordcertain events, e.g. "checkout @{u}", and
gives a hard/fatal error. Even though it inherently is impossible
to give a correct answer because the reflog entries lose some
information (e.g. "@{u}" does not record what branch the user was
on hence which branch 'the upstream' needs to be computed, and even
if the record were available, the relationship between branches may
have changed), at least hide the error to allow "status" show its
output.
* jt/interpret-branch-name-fallback:
wt-status: tolerate dangling marks
refs: move dwim_ref() to header file
sha1-name: replace unsigned int with option struct
diff --git a/archive.c b/archive.c
index fb39706..0de6048 100644
--- a/archive.c
+++ b/archive.c
@@ -397,10 +397,10 @@
const char *colon = strchrnul(name, ':');
int refnamelen = colon - name;
- if (!dwim_ref(name, refnamelen, &oid, &ref))
+ if (!dwim_ref(name, refnamelen, &oid, &ref, 0))
die(_("no such ref: %.*s"), refnamelen, name);
} else {
- dwim_ref(name, strlen(name), &oid, &ref);
+ dwim_ref(name, strlen(name), &oid, &ref, 0);
}
if (get_oid(name, &oid))
diff --git a/branch.c b/branch.c
index 7095f78..9c9dae1 100644
--- a/branch.c
+++ b/branch.c
@@ -281,7 +281,7 @@
die(_("Not a valid object name: '%s'."), start_name);
}
- switch (dwim_ref(start_name, strlen(start_name), &oid, &real_ref)) {
+ switch (dwim_ref(start_name, strlen(start_name), &oid, &real_ref, 0)) {
case 0:
/* Not branching from any existing branch */
if (explicit_tracking)
diff --git a/builtin/checkout.c b/builtin/checkout.c
index 6ec8209..0951f8f 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -651,7 +651,7 @@
* If this is a ref, resolve it; otherwise, look up the OID for our
* expression. Failure here is okay.
*/
- if (!dwim_ref(branch->name, strlen(branch->name), &branch->oid, &branch->refname))
+ if (!dwim_ref(branch->name, strlen(branch->name), &branch->oid, &branch->refname, 0))
repo_get_oid_committish(the_repository, branch->name, &branch->oid);
strbuf_branchname(&buf, branch->name, INTERPRET_BRANCH_LOCAL);
@@ -1345,7 +1345,7 @@
struct object_id oid;
char *to_free;
- if (dwim_ref(branch_info->name, strlen(branch_info->name), &oid, &to_free) == 1) {
+ if (dwim_ref(branch_info->name, strlen(branch_info->name), &oid, &to_free, 0) == 1) {
const char *ref = to_free;
if (skip_prefix(ref, "refs/tags/", &ref))
diff --git a/builtin/fast-export.c b/builtin/fast-export.c
index 9f37895..1b8fca3 100644
--- a/builtin/fast-export.c
+++ b/builtin/fast-export.c
@@ -943,7 +943,7 @@
if (e->flags & UNINTERESTING)
continue;
- if (dwim_ref(e->name, strlen(e->name), &oid, &full_name) != 1)
+ if (dwim_ref(e->name, strlen(e->name), &oid, &full_name, 0) != 1)
continue;
if (refspecs.nr) {
diff --git a/builtin/log.c b/builtin/log.c
index b58f8da..4ec7f57 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -1061,7 +1061,7 @@
return NULL;
ref = rev->cmdline.rev[positive].name;
tip_oid = &rev->cmdline.rev[positive].item->oid;
- if (dwim_ref(ref, strlen(ref), &branch_oid, &full_ref) &&
+ if (dwim_ref(ref, strlen(ref), &branch_oid, &full_ref, 0) &&
skip_prefix(full_ref, "refs/heads/", &v) &&
oideq(tip_oid, &branch_oid))
branch = xstrdup(v);
diff --git a/builtin/merge.c b/builtin/merge.c
index b9a89ba..032a8f5 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -500,7 +500,7 @@
if (!remote_head)
die(_("'%s' does not point to a commit"), remote);
- if (dwim_ref(remote, strlen(remote), &branch_head, &found_ref) > 0) {
+ if (dwim_ref(remote, strlen(remote), &branch_head, &found_ref, 0) > 0) {
if (starts_with(found_ref, "refs/heads/")) {
strbuf_addf(msg, "%s\t\tbranch '%s' of .\n",
oid_to_hex(&branch_head), remote);
diff --git a/builtin/reset.c b/builtin/reset.c
index 8ae69d6..c635b06 100644
--- a/builtin/reset.c
+++ b/builtin/reset.c
@@ -423,7 +423,7 @@
char *ref = NULL;
int err;
- dwim_ref(rev, strlen(rev), &dummy, &ref);
+ dwim_ref(rev, strlen(rev), &dummy, &ref, 0);
if (ref && !starts_with(ref, "refs/"))
ref = NULL;
diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c
index 669dd2f..ed200c8 100644
--- a/builtin/rev-parse.c
+++ b/builtin/rev-parse.c
@@ -136,7 +136,7 @@
struct object_id discard;
char *full;
- switch (dwim_ref(name, strlen(name), &discard, &full)) {
+ switch (dwim_ref(name, strlen(name), &discard, &full, 0)) {
case 0:
/*
* Not found -- not a ref. We could
diff --git a/builtin/show-branch.c b/builtin/show-branch.c
index 7eae5f3..d6d2dab 100644
--- a/builtin/show-branch.c
+++ b/builtin/show-branch.c
@@ -741,7 +741,7 @@
die(Q_("only %d entry can be shown at one time.",
"only %d entries can be shown at one time.",
MAX_REVS), MAX_REVS);
- if (!dwim_ref(*av, strlen(*av), &oid, &ref))
+ if (!dwim_ref(*av, strlen(*av), &oid, &ref, 0))
die(_("no such ref %s"), *av);
/* Has the base been specified? */
diff --git a/builtin/stash.c b/builtin/stash.c
index 4bdfaf8..3f811f3 100644
--- a/builtin/stash.c
+++ b/builtin/stash.c
@@ -185,7 +185,7 @@
end_of_rev = strchrnul(revision, '@');
strbuf_add(&symbolic, revision, end_of_rev - revision);
- ret = dwim_ref(symbolic.buf, symbolic.len, &dummy, &expanded_ref);
+ ret = dwim_ref(symbolic.buf, symbolic.len, &dummy, &expanded_ref, 0);
strbuf_release(&symbolic);
switch (ret) {
case 0: /* Not found, but valid ref */
diff --git a/bundle.c b/bundle.c
index 995a940..cb0e593 100644
--- a/bundle.c
+++ b/bundle.c
@@ -403,7 +403,7 @@
if (e->item->flags & UNINTERESTING)
continue;
- if (dwim_ref(e->name, strlen(e->name), &oid, &ref) != 1)
+ if (dwim_ref(e->name, strlen(e->name), &oid, &ref, 0) != 1)
goto skip_write_ref;
if (read_ref_full(e->name, RESOLVE_REF_READING, &oid, &flag))
flag = 0;
diff --git a/cache.h b/cache.h
index 4cad61f..cee8aa5 100644
--- a/cache.h
+++ b/cache.h
@@ -1557,21 +1557,32 @@
*
* If the input was ok but there are not N branch switches in the
* reflog, it returns 0.
- *
- * If "allowed" is non-zero, it is a treated as a bitfield of allowable
- * expansions: local branches ("refs/heads/"), remote branches
- * ("refs/remotes/"), or "HEAD". If no "allowed" bits are set, any expansion is
- * allowed, even ones to refs outside of those namespaces.
*/
#define INTERPRET_BRANCH_LOCAL (1<<0)
#define INTERPRET_BRANCH_REMOTE (1<<1)
#define INTERPRET_BRANCH_HEAD (1<<2)
+struct interpret_branch_name_options {
+ /*
+ * If "allowed" is non-zero, it is a treated as a bitfield of allowable
+ * expansions: local branches ("refs/heads/"), remote branches
+ * ("refs/remotes/"), or "HEAD". If no "allowed" bits are set, any expansion is
+ * allowed, even ones to refs outside of those namespaces.
+ */
+ unsigned allowed;
+
+ /*
+ * If ^{upstream} or ^{push} (or equivalent) is requested, and the
+ * branch in question does not have such a reference, return -1 instead
+ * of die()-ing.
+ */
+ unsigned nonfatal_dangling_mark : 1;
+};
int repo_interpret_branch_name(struct repository *r,
const char *str, int len,
struct strbuf *buf,
- unsigned allowed);
-#define interpret_branch_name(str, len, buf, allowed) \
- repo_interpret_branch_name(the_repository, str, len, buf, allowed)
+ const struct interpret_branch_name_options *options);
+#define interpret_branch_name(str, len, buf, options) \
+ repo_interpret_branch_name(the_repository, str, len, buf, options)
int validate_headref(const char *ref);
diff --git a/commit.c b/commit.c
index bc741e7..f53429c 100644
--- a/commit.c
+++ b/commit.c
@@ -921,7 +921,7 @@
struct commit *ret = NULL;
char *full_refname;
- switch (dwim_ref(refname, strlen(refname), &oid, &full_refname)) {
+ switch (dwim_ref(refname, strlen(refname), &oid, &full_refname, 0)) {
case 0:
die("No such ref: '%s'", refname);
case 1:
diff --git a/refs.c b/refs.c
index 156fdcd..8374dfe 100644
--- a/refs.c
+++ b/refs.c
@@ -598,10 +598,14 @@
* to name a branch.
*/
static char *substitute_branch_name(struct repository *r,
- const char **string, int *len)
+ const char **string, int *len,
+ int nonfatal_dangling_mark)
{
struct strbuf buf = STRBUF_INIT;
- int ret = repo_interpret_branch_name(r, *string, *len, &buf, 0);
+ struct interpret_branch_name_options options = {
+ .nonfatal_dangling_mark = nonfatal_dangling_mark
+ };
+ int ret = repo_interpret_branch_name(r, *string, *len, &buf, &options);
if (ret == *len) {
size_t size;
@@ -614,19 +618,15 @@
}
int repo_dwim_ref(struct repository *r, const char *str, int len,
- struct object_id *oid, char **ref)
+ struct object_id *oid, char **ref, int nonfatal_dangling_mark)
{
- char *last_branch = substitute_branch_name(r, &str, &len);
+ char *last_branch = substitute_branch_name(r, &str, &len,
+ nonfatal_dangling_mark);
int refs_found = expand_ref(r, str, len, oid, ref);
free(last_branch);
return refs_found;
}
-int dwim_ref(const char *str, int len, struct object_id *oid, char **ref)
-{
- return repo_dwim_ref(the_repository, str, len, oid, ref);
-}
-
int expand_ref(struct repository *repo, const char *str, int len,
struct object_id *oid, char **ref)
{
@@ -665,7 +665,7 @@
struct object_id *oid, char **log)
{
struct ref_store *refs = get_main_ref_store(r);
- char *last_branch = substitute_branch_name(r, &str, &len);
+ char *last_branch = substitute_branch_name(r, &str, &len, 0);
const char **p;
int logs_found = 0;
struct strbuf path = STRBUF_INIT;
diff --git a/refs.h b/refs.h
index 04bd250..6695518 100644
--- a/refs.h
+++ b/refs.h
@@ -1,6 +1,8 @@
#ifndef REFS_H
#define REFS_H
+#include "cache.h"
+
struct object_id;
struct ref_store;
struct repository;
@@ -151,9 +153,15 @@
void expand_ref_prefix(struct strvec *prefixes, const char *prefix);
int expand_ref(struct repository *r, const char *str, int len, struct object_id *oid, char **ref);
-int repo_dwim_ref(struct repository *r, const char *str, int len, struct object_id *oid, char **ref);
+int repo_dwim_ref(struct repository *r, const char *str, int len,
+ struct object_id *oid, char **ref, int nonfatal_dangling_mark);
int repo_dwim_log(struct repository *r, const char *str, int len, struct object_id *oid, char **ref);
-int dwim_ref(const char *str, int len, struct object_id *oid, char **ref);
+static inline int dwim_ref(const char *str, int len, struct object_id *oid,
+ char **ref, int nonfatal_dangling_mark)
+{
+ return repo_dwim_ref(the_repository, str, len, oid, ref,
+ nonfatal_dangling_mark);
+}
int dwim_log(const char *str, int len, struct object_id *oid, char **ref);
/*
diff --git a/remote.c b/remote.c
index c5ed74f..4201508 100644
--- a/remote.c
+++ b/remote.c
@@ -1558,7 +1558,7 @@
strcmp(ret->remote_name, "."))
continue;
if (dwim_ref(ret->merge_name[i], strlen(ret->merge_name[i]),
- &oid, &ref) == 1)
+ &oid, &ref, 0) == 1)
ret->merge[i]->dst = ref;
else
ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
diff --git a/revision.c b/revision.c
index 0d67b84..1239023 100644
--- a/revision.c
+++ b/revision.c
@@ -315,13 +315,14 @@
const char *name, unsigned mode,
const char *path)
{
+ struct interpret_branch_name_options options = { 0 };
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);
+ int len = interpret_branch_name(name, 0, &buf, &options);
if (0 < len && name[len] && buf.len)
strbuf_addstr(&buf, name + len);
diff --git a/sha1-name.c b/sha1-name.c
index 0b8cb52..0b23b86 100644
--- a/sha1-name.c
+++ b/sha1-name.c
@@ -809,7 +809,7 @@
if (len == r->hash_algo->hexsz && !get_oid_hex(str, oid)) {
if (warn_ambiguous_refs && warn_on_object_refname_ambiguity) {
- refs_found = repo_dwim_ref(r, str, len, &tmp_oid, &real_ref);
+ refs_found = repo_dwim_ref(r, str, len, &tmp_oid, &real_ref, 0);
if (refs_found > 0) {
warning(warn_msg, len, str);
if (advice_object_name_warning)
@@ -860,11 +860,11 @@
if (!len && reflog_len)
/* allow "@{...}" to mean the current branch reflog */
- refs_found = repo_dwim_ref(r, "HEAD", 4, oid, &real_ref);
+ refs_found = repo_dwim_ref(r, "HEAD", 4, oid, &real_ref, 0);
else if (reflog_len)
refs_found = repo_dwim_log(r, str, len, oid, &real_ref);
else
- refs_found = repo_dwim_ref(r, str, len, oid, &real_ref);
+ refs_found = repo_dwim_ref(r, str, len, oid, &real_ref, 0);
if (!refs_found)
return -1;
@@ -1427,9 +1427,12 @@
struct strbuf tmp = STRBUF_INIT;
int used = buf->len;
int ret;
+ struct interpret_branch_name_options options = {
+ .allowed = allowed
+ };
strbuf_add(buf, name + len, namelen - len);
- ret = repo_interpret_branch_name(r, buf->buf, buf->len, &tmp, allowed);
+ ret = repo_interpret_branch_name(r, buf->buf, buf->len, &tmp, &options);
/* that data was not interpreted, remove our cruft */
if (ret < 0) {
strbuf_setlen(buf, used);
@@ -1471,7 +1474,7 @@
int (*get_mark)(const char *, int),
const char *(*get_data)(struct branch *,
struct strbuf *),
- unsigned allowed)
+ const struct interpret_branch_name_options *options)
{
int len;
struct branch *branch;
@@ -1493,10 +1496,16 @@
branch = branch_get(NULL);
value = get_data(branch, &err);
- if (!value)
- die("%s", err.buf);
+ if (!value) {
+ if (options->nonfatal_dangling_mark) {
+ strbuf_release(&err);
+ return -1;
+ } else {
+ die("%s", err.buf);
+ }
+ }
- if (!branch_interpret_allowed(value, allowed))
+ if (!branch_interpret_allowed(value, options->allowed))
return -1;
set_shortened_ref(r, buf, value);
@@ -1506,7 +1515,7 @@
int repo_interpret_branch_name(struct repository *r,
const char *name, int namelen,
struct strbuf *buf,
- unsigned allowed)
+ const struct interpret_branch_name_options *options)
{
char *at;
const char *start;
@@ -1515,7 +1524,7 @@
if (!namelen)
namelen = strlen(name);
- if (!allowed || (allowed & INTERPRET_BRANCH_LOCAL)) {
+ if (!options->allowed || (options->allowed & INTERPRET_BRANCH_LOCAL)) {
len = interpret_nth_prior_checkout(r, name, namelen, buf);
if (!len) {
return len; /* syntax Ok, not enough switches */
@@ -1523,7 +1532,8 @@
if (len == namelen)
return len; /* consumed all */
else
- return reinterpret(r, name, namelen, len, buf, allowed);
+ return reinterpret(r, name, namelen, len, buf,
+ options->allowed);
}
}
@@ -1531,22 +1541,22 @@
(at = memchr(start, '@', namelen - (start - name)));
start = at + 1) {
- if (!allowed || (allowed & INTERPRET_BRANCH_HEAD)) {
+ if (!options->allowed || (options->allowed & INTERPRET_BRANCH_HEAD)) {
len = interpret_empty_at(name, namelen, at - name, buf);
if (len > 0)
return reinterpret(r, name, namelen, len, buf,
- allowed);
+ options->allowed);
}
len = interpret_branch_mark(r, name, namelen, at - name, buf,
upstream_mark, branch_get_upstream,
- allowed);
+ options);
if (len > 0)
return len;
len = interpret_branch_mark(r, name, namelen, at - name, buf,
push_mark, branch_get_push,
- allowed);
+ options);
if (len > 0)
return len;
}
@@ -1557,7 +1567,10 @@
void strbuf_branchname(struct strbuf *sb, const char *name, unsigned allowed)
{
int len = strlen(name);
- int used = interpret_branch_name(name, len, sb, allowed);
+ struct interpret_branch_name_options options = {
+ .allowed = allowed
+ };
+ int used = interpret_branch_name(name, len, sb, &options);
if (used < 0)
used = 0;
diff --git a/t/t7508-status.sh b/t/t7508-status.sh
index e817593..45e1f6f 100755
--- a/t/t7508-status.sh
+++ b/t/t7508-status.sh
@@ -846,6 +846,18 @@
test_cmp expect output
'
+test_expect_success 'status shows detached HEAD properly after checking out non-local upstream branch' '
+ test_when_finished rm -rf upstream downstream actual &&
+
+ test_create_repo upstream &&
+ test_commit -C upstream foo &&
+
+ git clone upstream downstream &&
+ git -C downstream checkout @{u} &&
+ git -C downstream status >actual &&
+ test_i18ngrep "HEAD detached at [0-9a-f]\\+" actual
+'
+
test_expect_success 'setup status submodule summary' '
test_create_repo sm && (
cd sm &&
diff --git a/wt-status.c b/wt-status.c
index bb0f912..d9872d5 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -1569,7 +1569,7 @@
return;
}
- if (dwim_ref(cb.buf.buf, cb.buf.len, &oid, &ref) == 1 &&
+ if (dwim_ref(cb.buf.buf, cb.buf.len, &oid, &ref, 1) == 1 &&
/* sha1 is a commit? match without further lookup */
(oideq(&cb.noid, &oid) ||
/* perhaps sha1 is a tag, try to dereference to a commit */
