Merge branch 'np/delta' into next

diff --git a/sha1_name.c b/sha1_name.c
index 3adaec3167d19fd9e3f2c3f6c06530583428c3c6..ec5cd2c9ea42cfdd07a1fcac1f2c05072aa26193 100644 (file)
--- 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)
 {
@@ -236,7 +237,7 @@ static int ambiguous_path(const char *path, int len)
 static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
 {
        static const char *fmt[] = {
-               "/%.*s",
+               "%.*s",
                "refs/%.*s",
                "refs/tags/%.*s",
                "refs/heads/%.*s",
@@ -263,8 +264,7 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
                pathname = git_path(*p, len, str);
                if (!read_ref(pathname, this_result)) {
                        if (warn_ambiguous_refs) {
-                               if (already_found &&
-                                   !memcmp(sha1, sha1_from_ref, 20))
+                               if (already_found)
                                        fprintf(stderr, warning, len, str);
                                already_found++;
                        }
@@ -456,6 +456,57 @@ 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;
+       int namelen = strlen(name);
+       const char *cp;
+
        prepare_alt_odb();
-       return get_sha1_1(name, strlen(name), sha1);
+       ret = get_sha1_1(name, namelen, sha1);
+       if (!ret)
+               return ret;
+       /* sha1:path --> object name of path in ent sha1
+        * :path -> object name of path in index
+        * :[0-3]:path -> object name of path in index at stage
+        */
+       if (name[0] == ':') {
+               int stage = 0;
+               struct cache_entry *ce;
+               int pos;
+               if (namelen < 3 ||
+                   name[2] != ':' ||
+                   name[1] < '0' || '3' < name[1])
+                       cp = name + 1;
+               else {
+                       stage = name[1] - '0';
+                       cp = name + 3;
+               }
+               namelen = namelen - (cp - name);
+               if (!active_cache)
+                       read_cache();
+               if (active_nr < 0)
+                       return -1;
+               pos = cache_name_pos(cp, namelen);
+               if (pos < 0)
+                       pos = -pos - 1;
+               while (pos < active_nr) {
+                       ce = active_cache[pos];
+                       if (ce_namelen(ce) != namelen ||
+                           memcmp(ce->name, cp, namelen))
+                               break;
+                       if (ce_stage(ce) == stage) {
+                               memcpy(sha1, ce->sha1, 20);
+                               return 0;
+                       }
+               }
+               return -1;
+       }
+       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;
 }