commit: add "lookup_commit_reference()" helper function
It's pretty much the same as "lookup_commit()", but it will take tags too, and look up the commit (if any) associated with them.
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parent
fbab835c03
commit
961784ee42
29
commit.c
29
commit.c
@ -1,3 +1,4 @@
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#include "tag.h"
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#include "commit.h"
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#include "cache.h"
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#include <string.h>
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@ -5,6 +6,27 @@
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const char *commit_type = "commit";
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static struct commit *check_commit(struct object *obj, unsigned char *sha1)
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{
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if (obj->type != commit_type) {
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error("Object %s is a %s, not a commit",
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sha1_to_hex(sha1), obj->type);
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return NULL;
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}
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return (struct commit *) obj;
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}
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struct commit *lookup_commit_reference(unsigned char *sha1)
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{
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struct object *obj = parse_object(sha1);
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if (!obj)
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return NULL;
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if (obj->type == tag_type)
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obj = ((struct tag *)obj)->tagged;
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return check_commit(obj, sha1);
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}
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struct commit *lookup_commit(unsigned char *sha1)
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{
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struct object *obj = lookup_object(sha1);
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@ -15,12 +37,7 @@ struct commit *lookup_commit(unsigned char *sha1)
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ret->object.type = commit_type;
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return ret;
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}
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if (obj->type != commit_type) {
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error("Object %s is a %s, not a commit",
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sha1_to_hex(sha1), obj->type);
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return NULL;
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}
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return (struct commit *) obj;
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return check_commit(obj, sha1);
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}
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static unsigned long parse_commit_date(const char *buf)
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