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-rw-r--r--sha1_name.c16
-rw-r--r--tree-walk.c50
-rw-r--r--tree-walk.h2
3 files changed, 67 insertions, 1 deletions
diff --git a/sha1_name.c b/sha1_name.c
index 4f92e12..345935b 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -3,6 +3,7 @@
#include "commit.h"
#include "tree.h"
#include "blob.h"
+#include "tree-walk.h"
static int find_short_object_filename(int len, const char *name, unsigned char *sha1)
{
@@ -455,6 +456,19 @@ static int get_sha1_1(const char *name, int len, unsigned char *sha1)
*/
int get_sha1(const char *name, unsigned char *sha1)
{
+ int ret;
+ unsigned unused;
+
prepare_alt_odb();
- return get_sha1_1(name, strlen(name), sha1);
+ ret = get_sha1_1(name, strlen(name), sha1);
+ if (ret < 0) {
+ const char *cp = strchr(name, ':');
+ if (cp) {
+ unsigned char tree_sha1[20];
+ if (!get_sha1_1(name, cp-name, tree_sha1))
+ return get_tree_entry(tree_sha1, cp+1, sha1,
+ &unused);
+ }
+ }
+ return ret;
}
diff --git a/tree-walk.c b/tree-walk.c
index bf8bfdf..9f7abb7 100644
--- a/tree-walk.c
+++ b/tree-walk.c
@@ -115,3 +115,53 @@ void traverse_trees(int n, struct tree_desc *t, const char *base, traverse_callb
free(entry);
}
+static int find_tree_entry(struct tree_desc *t, const char *name, unsigned char *result, unsigned *mode)
+{
+ int namelen = strlen(name);
+ while (t->size) {
+ const char *entry;
+ const unsigned char *sha1;
+ int entrylen, cmp;
+
+ sha1 = tree_entry_extract(t, &entry, mode);
+ update_tree_entry(t);
+ entrylen = strlen(entry);
+ if (entrylen > namelen)
+ continue;
+ cmp = memcmp(name, entry, entrylen);
+ if (cmp > 0)
+ continue;
+ if (cmp < 0)
+ break;
+ if (entrylen == namelen) {
+ memcpy(result, sha1, 20);
+ return 0;
+ }
+ if (name[entrylen] != '/')
+ continue;
+ if (!S_ISDIR(*mode))
+ break;
+ if (++entrylen == namelen) {
+ memcpy(result, sha1, 20);
+ return 0;
+ }
+ return get_tree_entry(sha1, name + entrylen, result, mode);
+ }
+ return -1;
+}
+
+int get_tree_entry(const unsigned char *tree_sha1, const char *name, unsigned char *sha1, unsigned *mode)
+{
+ int retval;
+ void *tree;
+ struct tree_desc t;
+
+ tree = read_object_with_reference(tree_sha1, tree_type, &t.size, NULL);
+ if (!tree)
+ return -1;
+ t.buf = tree;
+ retval = find_tree_entry(&t, name, sha1, mode);
+ free(tree);
+ return retval;
+}
+
diff --git a/tree-walk.h b/tree-walk.h
index 76893e3..47438fe 100644
--- a/tree-walk.h
+++ b/tree-walk.h
@@ -22,4 +22,6 @@ typedef void (*traverse_callback_t)(int n, unsigned long mask, struct name_entry
void traverse_trees(int n, struct tree_desc *t, const char *base, traverse_callback_t callback);
+int get_tree_entry(const unsigned char *, const char *, unsigned char *, unsigned *);
+
#endif