mirror of
https://github.com/git/git
synced 2024-10-30 04:01:21 +00:00
8d0017daa1
Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
#include "cache.h"
|
|
#include "diff.h"
|
|
#include "commit.h"
|
|
#include "sha1-lookup.h"
|
|
#include "patch-ids.h"
|
|
|
|
static int patch_id_defined(struct commit *commit)
|
|
{
|
|
/* must be 0 or 1 parents */
|
|
return !commit->parents || !commit->parents->next;
|
|
}
|
|
|
|
int commit_patch_id(struct commit *commit, struct diff_options *options,
|
|
struct object_id *oid, int diff_header_only)
|
|
{
|
|
if (!patch_id_defined(commit))
|
|
return -1;
|
|
|
|
if (commit->parents)
|
|
diff_tree_oid(&commit->parents->item->object.oid,
|
|
&commit->object.oid, "", options);
|
|
else
|
|
diff_root_tree_oid(&commit->object.oid, "", options);
|
|
diffcore_std(options);
|
|
return diff_flush_patch_id(options, oid, 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(const void *cmpfn_data,
|
|
const void *entry,
|
|
const void *entry_or_key,
|
|
const void *unused_keydata)
|
|
{
|
|
/* NEEDSWORK: const correctness? */
|
|
struct diff_options *opt = (void *)cmpfn_data;
|
|
struct patch_id *a = (void *)entry;
|
|
struct patch_id *b = (void *)entry_or_key;
|
|
|
|
if (is_null_oid(&a->patch_id) &&
|
|
commit_patch_id(a->commit, opt, &a->patch_id, 0))
|
|
return error("Could not get patch ID for %s",
|
|
oid_to_hex(&a->commit->object.oid));
|
|
if (is_null_oid(&b->patch_id) &&
|
|
commit_patch_id(b->commit, opt, &b->patch_id, 0))
|
|
return error("Could not get patch ID for %s",
|
|
oid_to_hex(&b->commit->object.oid));
|
|
return oidcmp(&a->patch_id, &b->patch_id);
|
|
}
|
|
|
|
int init_patch_ids(struct patch_ids *ids)
|
|
{
|
|
memset(ids, 0, sizeof(*ids));
|
|
diff_setup(&ids->diffopts);
|
|
ids->diffopts.detect_rename = 0;
|
|
DIFF_OPT_SET(&ids->diffopts, RECURSIVE);
|
|
diff_setup_done(&ids->diffopts);
|
|
hashmap_init(&ids->patches, patch_id_cmp, &ids->diffopts, 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)
|
|
{
|
|
struct object_id header_only_patch_id;
|
|
|
|
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.hash));
|
|
return 0;
|
|
}
|
|
|
|
struct patch_id *has_commit_patch_id(struct commit *commit,
|
|
struct patch_ids *ids)
|
|
{
|
|
struct patch_id patch;
|
|
|
|
if (!patch_id_defined(commit))
|
|
return NULL;
|
|
|
|
memset(&patch, 0, sizeof(patch));
|
|
if (init_patch_id_entry(&patch, commit, ids))
|
|
return NULL;
|
|
|
|
return hashmap_get(&ids->patches, &patch, NULL);
|
|
}
|
|
|
|
struct patch_id *add_commit_patch_id(struct commit *commit,
|
|
struct patch_ids *ids)
|
|
{
|
|
struct patch_id *key;
|
|
|
|
if (!patch_id_defined(commit))
|
|
return NULL;
|
|
|
|
key = xcalloc(1, sizeof(*key));
|
|
if (init_patch_id_entry(key, commit, ids)) {
|
|
free(key);
|
|
return NULL;
|
|
}
|
|
|
|
hashmap_add(&ids->patches, key);
|
|
return key;
|
|
}
|