[PATCH] Introducing software archaeologist's tool "pickaxe".

diff --git a/diff-files.c b/diff-files.c
index 28f1b13b384dc122daf2b16574536e944b0f6291..d3b80a07255511097fd0eebe94fc844f63d5e152 100644 (file)
--- a/diff-files.c
+++ b/diff-files.c
@@ -7,10 +7,14 @@
 #include "diff.h"
 
 static const char *diff_files_usage =
-"diff-files [-p] [-q] [-r] [-z] [paths...]";
+"git-diff-files [-p] [-q] [-r] [-z] [-M] [-C] [-R] [-S<string>] [paths...]";
 
 static int generate_patch = 0;
 static int line_termination = '\n';
+static int detect_rename = 0;
+static int reverse_diff = 0;
+static int diff_score_opt = 0;
+static char *pickaxe = 0;
 static int silent = 0;
 
 static int matches_pathspec(struct cache_entry *ce, char **spec, int cnt)
@@ -30,41 +34,24 @@ static int matches_pathspec(struct cache_entry *ce, char **spec, int cnt)
 
 static void show_unmerge(const char *path)
 {
-       if (generate_patch)
-               diff_unmerge(path);
-       else
-               printf("U %s%c", path, line_termination);
+       diff_unmerge(path);
 }
 
 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);
+       diff_addremove(pfx, ntohl(ce->ce_mode), ce->sha1, ce->name, NULL);
 }
 
 static void show_modified(int oldmode, int mode,
-                         const char *old_sha1, const char *sha1,
+                         const unsigned char *old_sha1, const unsigned 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);
+       diff_change(oldmode, mode, old_sha1, sha1, path, NULL);
 }
 
 int main(int argc, char **argv)
 {
-       static const char null_sha1[20] = { 0, };
+       static const unsigned char null_sha1[20] = { 0, };
        int entries = read_cache();
        int i;
 
@@ -79,6 +66,19 @@ int main(int argc, char **argv)
                        ; /* no-op */
                else if (!strcmp(argv[1], "-z"))
                        line_termination = 0;
+               else if (!strcmp(argv[1], "-R"))
+                       reverse_diff = 1;
+               else if (!strcmp(argv[1], "-S"))
+                       pickaxe = argv[1] + 2;
+               else if (!strncmp(argv[1], "-M", 2)) {
+                       diff_score_opt = diff_scoreopt_parse(argv[1]);
+                       detect_rename = generate_patch = 1;
+               }
+               else if (!strncmp(argv[1], "-C", 2)) {
+                       diff_score_opt = diff_scoreopt_parse(argv[1]);
+                       detect_rename = 2;
+                       generate_patch = 1;
+               }
                else
                        usage(diff_files_usage);
                argv++; argc--;
@@ -92,6 +92,10 @@ int main(int argc, char **argv)
                exit(1);
        }
 
+       diff_setup(detect_rename, diff_score_opt, pickaxe,
+                  reverse_diff, (generate_patch ? -1 : line_termination),
+                  NULL, 0);
+
        for (i = 0; i < entries; i++) {
                struct stat st;
                unsigned int oldmode, mode;
@@ -110,18 +114,18 @@ int main(int argc, char **argv)
                        i--; /* compensate for loop control increments */
                        continue;
                }
- 
+
                if (lstat(ce->name, &st) < 0) {
-                       if (errno != ENOENT) {
+                       if (errno != ENOENT && errno != ENOTDIR) {
                                perror(ce->name);
                                continue;
-                       }       
+                       }
                        if (silent)
                                continue;
                        show_file('-', ce);
                        continue;
                }
-               changed = cache_match_stat(ce, &st);
+               changed = ce_match_stat(ce, &st);
                if (!changed)
                        continue;
 
@@ -132,5 +136,6 @@ int main(int argc, char **argv)
                show_modified(oldmode, mode, ce->sha1, null_sha1,
                              ce->name);
        }
+       diff_flush();
        return 0;
 }