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116 lines
2.8 KiB
116 lines
2.8 KiB
#include "cache.h" |
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#include "tag.h" |
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#include "commit.h" |
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#include "tree.h" |
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#include "blob.h" |
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const char *tag_type = "tag"; |
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struct object *deref_tag(struct object *o, const char *warn, int warnlen) |
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{ |
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while (o && o->type == OBJ_TAG) |
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o = parse_object(((struct tag *)o)->tagged->sha1); |
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if (!o && warn) { |
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if (!warnlen) |
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warnlen = strlen(warn); |
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error("missing object referenced by '%.*s'", warnlen, warn); |
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} |
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return o; |
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} |
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struct tag *lookup_tag(const unsigned char *sha1) |
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{ |
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struct object *obj = lookup_object(sha1); |
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if (!obj) |
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return create_object(sha1, OBJ_TAG, alloc_tag_node()); |
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if (!obj->type) |
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obj->type = OBJ_TAG; |
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if (obj->type != OBJ_TAG) { |
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error("Object %s is a %s, not a tag", |
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sha1_to_hex(sha1), typename(obj->type)); |
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return NULL; |
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} |
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return (struct tag *) obj; |
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} |
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int parse_tag_buffer(struct tag *item, void *data, unsigned long size) |
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{ |
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int typelen, taglen; |
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unsigned char sha1[20]; |
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const char *type_line, *tag_line, *sig_line; |
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char type[20]; |
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if (item->object.parsed) |
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return 0; |
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item->object.parsed = 1; |
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if (size < 64) |
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return -1; |
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if (memcmp("object ", data, 7) || get_sha1_hex((char *) data + 7, sha1)) |
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return -1; |
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type_line = (char *) data + 48; |
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if (memcmp("\ntype ", type_line-1, 6)) |
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return -1; |
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tag_line = strchr(type_line, '\n'); |
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if (!tag_line || memcmp("tag ", ++tag_line, 4)) |
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return -1; |
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sig_line = strchr(tag_line, '\n'); |
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if (!sig_line) |
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return -1; |
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sig_line++; |
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typelen = tag_line - type_line - strlen("type \n"); |
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if (typelen >= 20) |
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return -1; |
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memcpy(type, type_line + 5, typelen); |
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type[typelen] = '\0'; |
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taglen = sig_line - tag_line - strlen("tag \n"); |
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item->tag = xmemdupz(tag_line + 4, taglen); |
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if (!strcmp(type, blob_type)) { |
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item->tagged = &lookup_blob(sha1)->object; |
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} else if (!strcmp(type, tree_type)) { |
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item->tagged = &lookup_tree(sha1)->object; |
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} else if (!strcmp(type, commit_type)) { |
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item->tagged = &lookup_commit(sha1)->object; |
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} else if (!strcmp(type, tag_type)) { |
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item->tagged = &lookup_tag(sha1)->object; |
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} else { |
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error("Unknown type %s", type); |
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item->tagged = NULL; |
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} |
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if (item->tagged && track_object_refs) { |
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struct object_refs *refs = alloc_object_refs(1); |
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refs->ref[0] = item->tagged; |
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set_object_refs(&item->object, refs); |
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} |
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return 0; |
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} |
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int parse_tag(struct tag *item) |
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{ |
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enum object_type type; |
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void *data; |
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unsigned long size; |
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int ret; |
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if (item->object.parsed) |
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return 0; |
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data = read_sha1_file(item->object.sha1, &type, &size); |
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if (!data) |
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return error("Could not read %s", |
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sha1_to_hex(item->object.sha1)); |
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if (type != OBJ_TAG) { |
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free(data); |
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return error("Object %s not a tag", |
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sha1_to_hex(item->object.sha1)); |
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} |
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ret = parse_tag_buffer(item, data, size); |
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free(data); |
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return ret; |
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}
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