Similar to the diff-cache command, we should accept commit ID
when tree ID is required but the end-user intent is unambiguous.
This patch lifts the tree-from-tree-or-commit logic from
diff-cache.c and moves it to sha1_file.c, which is a common
library source for the SHA1 storage part.
Signed-off-by: Junio C Hamano <[EMAIL PROTECTED]>
---
cache.h | 1 +
diff-cache.c | 18 ++----------------
sha1_file.c | 28 ++++++++++++++++++++++++++++
3 files changed, 31 insertions(+), 16 deletions(-)
Makefile: needs update
--- a/cache.h
+++ b/cache.h
@@ -124,5 +124,6 @@ extern void die(const char *err, ...);
extern int error(const char *err, ...);
extern int cache_name_compare(const char *name1, int len1, const char *name2,
int len2);
+extern void *tree_from_tree_or_commit(unsigned char *sha1, char *type,
unsigned long *size);
#endif /* CACHE_H */
--- a/diff-cache.c
+++ b/diff-cache.c
@@ -245,23 +245,9 @@ int main(int argc, char **argv)
if (argc != 2 || get_sha1_hex(argv[1], tree_sha1))
usage("diff-cache [-r] [-z] <tree sha1>");
+ tree = tree_from_tree_or_commit(tree_sha1, type, &size);
tree = read_sha1_file(tree_sha1, type, &size);
if (!tree)
- die("bad tree object %s", argv[1]);
-
- /* We allow people to feed us a commit object, just because we're nice
*/
- if (!strcmp(type, "commit")) {
- /* tree sha1 is always at offset 5 ("tree ") */
- if (get_sha1_hex(tree + 5, tree_sha1))
- die("bad commit object %s", argv[1]);
- free(tree);
- tree = read_sha1_file(tree_sha1, type, &size);
- if (!tree)
- die("unable to read tree object %s",
sha1_to_hex(tree_sha1));
- }
-
- if (strcmp(type, "tree"))
- die("bad tree object %s (%s)", sha1_to_hex(tree_sha1), type);
-
+ die("cannot get tree object from %s", argv[1]);
return diff_cache(tree, size, active_cache, active_nr, "");
}
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -245,3 +245,31 @@ int write_sha1_buffer(const unsigned cha
close(fd);
return 0;
}
+
+void *tree_from_tree_or_commit(unsigned char *sha1, char *type,
+ unsigned long *size)
+{
+ void *tree = read_sha1_file(sha1, type, size);
+ if (!tree)
+ return tree;
+
+ /* We allow people to feed us a commit object,
+ * just because we're nice.
+ */
+ if (!strcmp(type, "commit")) {
+ /* tree sha1 is always at offset 5 ("tree ") */
+ if (get_sha1_hex(tree + 5, sha1)) {
+ free(tree);
+ return NULL;
+ }
+ free(tree);
+ tree = read_sha1_file(sha1, type, size);
+ if (!tree)
+ return NULL;
+ }
+ if (strcmp(type , "tree")) {
+ free(tree);
+ return NULL;
+ }
+ return tree;
+}
-
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