blob: 082412aca66be6ce826034c5177e2f7f4b3bda58 [file] [log] [blame]
#include "cache.h"
#include "diff.h"
#include "commit.h"
#include "sha1-lookup.h"
#include "patch-ids.h"
int commit_patch_id(struct commit *commit, struct diff_options *options,
unsigned char *sha1, int diff_header_only)
if (commit->parents)
commit->object.oid.hash, "", options);
diff_root_tree_sha1(commit->object.oid.hash, "", options);
return diff_flush_patch_id(options, sha1, diff_header_only);
* When we cannot load the full patch-id for both commits for whatever
* reason, the function returns -1 (i.e. return error(...)). Despite
* the "cmp" in the name of this function, the caller only cares about
* the return value being zero (a and b are equivalent) or non-zero (a
* and b are different), and returning non-zero would keep both in the
* result, even if they actually were equivalent, in order to err on
* the side of safety. The actual value being negative does not have
* any significance; only that it is non-zero matters.
static int patch_id_cmp(struct patch_id *a,
struct patch_id *b,
struct diff_options *opt)
if (is_null_sha1(a->patch_id) &&
commit_patch_id(a->commit, opt, a->patch_id, 0))
return error("Could not get patch ID for %s",
if (is_null_sha1(b->patch_id) &&
commit_patch_id(b->commit, opt, b->patch_id, 0))
return error("Could not get patch ID for %s",
return hashcmp(a->patch_id, b->patch_id);
int init_patch_ids(struct patch_ids *ids)
memset(ids, 0, sizeof(*ids));
DIFF_OPT_SET(&ids->diffopts, RECURSIVE);
hashmap_init(&ids->patches, (hashmap_cmp_fn)patch_id_cmp, 256);
return 0;
int free_patch_ids(struct patch_ids *ids)
hashmap_free(&ids->patches, 1);
return 0;
static int init_patch_id_entry(struct patch_id *patch,
struct commit *commit,
struct patch_ids *ids)
unsigned char header_only_patch_id[GIT_SHA1_RAWSZ];
patch->commit = commit;
if (commit_patch_id(commit, &ids->diffopts, header_only_patch_id, 1))
return -1;
hashmap_entry_init(patch, sha1hash(header_only_patch_id));
return 0;
struct patch_id *has_commit_patch_id(struct commit *commit,
struct patch_ids *ids)
struct patch_id patch;
memset(&patch, 0, sizeof(patch));
if (init_patch_id_entry(&patch, commit, ids))
return NULL;
return hashmap_get(&ids->patches, &patch, &ids->diffopts);
struct patch_id *add_commit_patch_id(struct commit *commit,
struct patch_ids *ids)
struct patch_id *key = xcalloc(1, sizeof(*key));
if (init_patch_id_entry(key, commit, ids)) {
return NULL;
hashmap_add(&ids->patches, key);
return key;