[PATCH] Reactivate show-diff patch generation

This uses the reworked diff interface to generate patches directly out
of show-diff when -p is specified.

Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/show-diff.c b/show-diff.c
index 4557bd82f302eb951e02281a67a84c959122031b..993668e01435aa56be95b76dc4697d28a4006ff1 100644 (file)
--- a/show-diff.c
+++ b/show-diff.c
@@ -4,10 +4,11 @@
  * Copyright (C) Linus Torvalds, 2005
  */
 #include "cache.h"
+#include "diff.h"
 
-static const char *show_diff_usage = "show-diff [-q] [-s] [-z] [paths...]";
+static const char *show_diff_usage = "show-diff [-q] [-s] [-z] [-p] [paths...]";
 
-static int recursive = 0;
+static int generate_patch = 0;
 static int line_termination = '\n';
 static int silent = 0;
 static int silent_on_nonexisting_files = 0;
@@ -27,27 +28,57 @@ static int matches_pathspec(struct cache_entry *ce, char **spec, int cnt)
        return 0;
 }
 
-static void show_file(const char *prefix, struct cache_entry *ce)
+static void show_unmerge(const char *path)
 {
-       printf("%s%o\t%s\t%s\t%s%c", prefix, ntohl(ce->ce_mode), "blob",
-               sha1_to_hex(ce->sha1), ce->name, line_termination);
+       if (generate_patch)
+               diff_unmerge(path);
+       else
+               printf("U %s%c", path, line_termination);
+}
+
+static void show_file(int pfx, struct cache_entry *ce)
+{
+       if (generate_patch)
+               diff_addremove(pfx, ntohl(ce->ce_mode), ce->sha1,
+                              ce->name, NULL);
+       else
+               printf("%c%06o\t%s\t%s\t%s%c",
+                      pfx, ntohl(ce->ce_mode), "blob",
+                      sha1_to_hex(ce->sha1), ce->name, line_termination);
+}
+
+static void show_modified(int oldmode, int mode,
+                         const char *old_sha1, const char *sha1,
+                         char *path)
+{
+       char old_sha1_hex[41];
+       strcpy(old_sha1_hex, sha1_to_hex(old_sha1));
+
+       if (generate_patch)
+               diff_change(oldmode, mode, old_sha1, sha1, path, NULL);
+       else
+               printf("*%06o->%06o\tblob\t%s->%s\t%s%c",
+                      oldmode, mode, old_sha1_hex, sha1_to_hex(sha1), path,
+                      line_termination);
 }
 
 int main(int argc, char **argv)
 {
-       static const char null_sha1_hex[] = "0000000000000000000000000000000000000000";
+       static const char null_sha1[20] = { 0, };
        int entries = read_cache();
        int i;
 
        while (1 < argc && argv[1][0] == '-') {
                if (!strcmp(argv[1], "-s"))
                        silent_on_nonexisting_files = silent = 1;
+               else if (!strcmp(argv[1], "-p"))
+                       generate_patch = 1;
                else if (!strcmp(argv[1], "-q"))
                        silent_on_nonexisting_files = 1;
                else if (!strcmp(argv[1], "-z"))
                        line_termination = 0;
                else if (!strcmp(argv[1], "-r"))
-                       recursive = 1;          /* No-op */
+                       ; /* no-op */
                else
                        usage(show_diff_usage);
                argv++; argc--;
@@ -72,8 +103,7 @@ int main(int argc, char **argv)
                        continue;
 
                if (ce_stage(ce)) {
-                       printf("U %s%c", ce->name, line_termination);
-
+                       show_unmerge(ce->name);
                        while (i < entries &&
                               !strcmp(ce->name, active_cache[i]->name))
                                i++;
@@ -88,7 +118,7 @@ int main(int argc, char **argv)
                        }       
                        if (silent_on_nonexisting_files)
                                continue;
-                       show_file("-", ce);
+                       show_file('-', ce);
                        continue;
                }
                changed = cache_match_stat(ce, &st);
@@ -98,10 +128,8 @@ int main(int argc, char **argv)
                oldmode = ntohl(ce->ce_mode);
                mode = S_IFREG | ce_permissions(st.st_mode);
 
-               printf("*%o->%o\t%s\t%s->%s\t%s%c",
-                       oldmode, mode, "blob",
-                       sha1_to_hex(ce->sha1), null_sha1_hex,
-                       ce->name, line_termination);
+               show_modified(oldmode, mode, ce->sha1, null_sha1,
+                             ce->name);
        }
        return 0;
 }