diff --cc: fix display of symlink conflicts during a merge.

"git-diff-files --cc" to show conflicts during merge did not pass
the correct mode information for the working tree down, and showed
bogus combined diff.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/combine-diff.c b/combine-diff.c
index a5f2c8dd4a414e513d0421f9a499d06c73ecaf5a..6b7c6be9590a41c1edd11ad68b0bc01ddd6209a4 100644 (file)
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -678,9 +678,25 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
        else {
                /* Used by diff-tree to read from the working tree */
                struct stat st;
-               int fd;
-               if (0 <= (fd = open(elem->path, O_RDONLY)) &&
-                   !fstat(fd, &st)) {
+               int fd = -1;
+
+               if (lstat(elem->path, &st) < 0)
+                       goto deleted_file;
+
+               if (S_ISLNK(st.st_mode)) {
+                       int len = st.st_size;
+                       result_size = len;
+                       result = xmalloc(len + 1);
+                       if (result_size != readlink(elem->path, result, len)) {
+                               error("readlink(%s): %s", elem->path,
+                                     strerror(errno));
+                               return;
+                       }
+                       result[len] = 0;
+                       elem->mode = canon_mode(st.st_mode);
+               }
+               else if (0 <= (fd = open(elem->path, O_RDONLY)) &&
+                        !fstat(fd, &st)) {
                        int len = st.st_size;
                        int sz = 0;
 
@@ -698,11 +714,12 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
                        result[len] = 0;
                }
                else {
-                       /* deleted file */
+               deleted_file:
                        result_size = 0;
                        elem->mode = 0;
                        result = xcalloc(1, 1);
                }
+
                if (0 <= fd)
                        close(fd);
        }

diff --git a/diff-lib.c b/diff-lib.c
index 556d5345bfc74c720d35097d24322436ffdebe57..60c0fa6488eda7ae382500b70041aac4202a59c0 100644 (file)
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -41,17 +41,27 @@ int run_diff_files(struct rev_info *revs, int silent_on_removed)
 
                        path_len = ce_namelen(ce);
 
-                       dpath = xmalloc (combine_diff_path_size (5, path_len));
+                       dpath = xmalloc(combine_diff_path_size(5, path_len));
                        dpath->path = (char *) &(dpath->parent[5]);
 
                        dpath->next = NULL;
                        dpath->len = path_len;
                        memcpy(dpath->path, ce->name, path_len);
                        dpath->path[path_len] = '\0';
-                       dpath->mode = 0;
                        hashclr(dpath->sha1);
                        memset(&(dpath->parent[0]), 0,
-                                       sizeof(struct combine_diff_parent)*5);
+                              sizeof(struct combine_diff_parent)*5);
+
+                       if (lstat(ce->name, &st) < 0) {
+                               if (errno != ENOENT && errno != ENOTDIR) {
+                                       perror(ce->name);
+                                       continue;
+                               }
+                               if (silent_on_removed)
+                                       continue;
+                       }
+                       else
+                               dpath->mode = canon_mode(st.st_mode);
 
                        while (i < entries) {
                                struct cache_entry *nce = active_cache[i];