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123 lines
3.4 KiB
123 lines
3.4 KiB
#include "cache.h" |
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#include "diff.h" |
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#include "commit.h" |
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#include "sha1-lookup.h" |
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#include "patch-ids.h" |
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static int patch_id_defined(struct commit *commit) |
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{ |
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/* must be 0 or 1 parents */ |
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return !commit->parents || !commit->parents->next; |
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} |
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int commit_patch_id(struct commit *commit, struct diff_options *options, |
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struct object_id *oid, int diff_header_only, int stable) |
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{ |
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if (!patch_id_defined(commit)) |
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return -1; |
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if (commit->parents) |
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diff_tree_oid(&commit->parents->item->object.oid, |
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&commit->object.oid, "", options); |
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else |
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diff_root_tree_oid(&commit->object.oid, "", options); |
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diffcore_std(options); |
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return diff_flush_patch_id(options, oid, diff_header_only, stable); |
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} |
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/* |
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* When we cannot load the full patch-id for both commits for whatever |
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* reason, the function returns -1 (i.e. return error(...)). Despite |
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* the "neq" in the name of this function, the caller only cares about |
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* the return value being zero (a and b are equivalent) or non-zero (a |
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* and b are different), and returning non-zero would keep both in the |
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* result, even if they actually were equivalent, in order to err on |
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* the side of safety. The actual value being negative does not have |
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* any significance; only that it is non-zero matters. |
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*/ |
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static int patch_id_neq(const void *cmpfn_data, |
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const struct hashmap_entry *eptr, |
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const struct hashmap_entry *entry_or_key, |
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const void *unused_keydata) |
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{ |
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/* NEEDSWORK: const correctness? */ |
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struct diff_options *opt = (void *)cmpfn_data; |
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struct patch_id *a, *b; |
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a = container_of(eptr, struct patch_id, ent); |
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b = container_of(entry_or_key, struct patch_id, ent); |
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if (is_null_oid(&a->patch_id) && |
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commit_patch_id(a->commit, opt, &a->patch_id, 0, 0)) |
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return error("Could not get patch ID for %s", |
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oid_to_hex(&a->commit->object.oid)); |
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if (is_null_oid(&b->patch_id) && |
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commit_patch_id(b->commit, opt, &b->patch_id, 0, 0)) |
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return error("Could not get patch ID for %s", |
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oid_to_hex(&b->commit->object.oid)); |
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return !oideq(&a->patch_id, &b->patch_id); |
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} |
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int init_patch_ids(struct repository *r, struct patch_ids *ids) |
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{ |
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memset(ids, 0, sizeof(*ids)); |
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repo_diff_setup(r, &ids->diffopts); |
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ids->diffopts.detect_rename = 0; |
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ids->diffopts.flags.recursive = 1; |
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diff_setup_done(&ids->diffopts); |
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hashmap_init(&ids->patches, patch_id_neq, &ids->diffopts, 256); |
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return 0; |
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} |
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int free_patch_ids(struct patch_ids *ids) |
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{ |
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hashmap_clear_and_free(&ids->patches, struct patch_id, ent); |
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return 0; |
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} |
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static int init_patch_id_entry(struct patch_id *patch, |
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struct commit *commit, |
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struct patch_ids *ids) |
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{ |
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struct object_id header_only_patch_id; |
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patch->commit = commit; |
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if (commit_patch_id(commit, &ids->diffopts, &header_only_patch_id, 1, 0)) |
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return -1; |
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hashmap_entry_init(&patch->ent, oidhash(&header_only_patch_id)); |
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return 0; |
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} |
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struct patch_id *has_commit_patch_id(struct commit *commit, |
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struct patch_ids *ids) |
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{ |
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struct patch_id patch; |
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if (!patch_id_defined(commit)) |
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return NULL; |
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memset(&patch, 0, sizeof(patch)); |
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if (init_patch_id_entry(&patch, commit, ids)) |
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return NULL; |
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return hashmap_get_entry(&ids->patches, &patch, ent, NULL); |
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} |
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struct patch_id *add_commit_patch_id(struct commit *commit, |
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struct patch_ids *ids) |
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{ |
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struct patch_id *key; |
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if (!patch_id_defined(commit)) |
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return NULL; |
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key = xcalloc(1, sizeof(*key)); |
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if (init_patch_id_entry(key, commit, ids)) { |
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free(key); |
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return NULL; |
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} |
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hashmap_add(&ids->patches, &key->ent); |
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return key; |
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}
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