[PATCH] apply.c: --exclude=fnmatch-pattern option.

Adds --exclude=pattern option to the "git-apply" command.  This
was useful while reimporting the BKCVS patchset dump of the
Linux kernel, starting at 2.4.0 and ending at 2.6.12-rc2 Ingo
announced some time ago to exclude BitKeeper directory.

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

diff --git a/apply.c b/apply.c
index c331f9144d2921e8ad4668f15613c33d283b3bb4..630d6bc463fd49a1954f9123575f52b96eb0555d 100644 (file)
--- a/apply.c
+++ b/apply.c
@@ -13,7 +13,7 @@
  * uses the working tree as a "branch" for a 3-way merge.
  */
 #include <ctype.h>
-
+#include <fnmatch.h>
 #include "cache.h"
 
 // We default to the merge behaviour, since that's what most people would
@@ -1345,9 +1345,9 @@ static void write_out_one_result(struct patch *patch)
        create_file(patch);
 }
 
-static void write_out_results(struct patch *list)
+static void write_out_results(struct patch *list, int skipped_patch)
 {
-       if (!list)
+       if (!list && !skipped_patch)
                die("No changes");
 
        while (list) {
@@ -1358,12 +1358,30 @@ static void write_out_results(struct patch *list)
 
 static struct cache_file cache_file;
 
+static struct excludes {
+       struct excludes *next;
+       const char *path;
+} *excludes;
+
+static int use_patch(struct patch *p)
+{
+       const char *pathname = p->new_name ? : p->old_name;
+       struct excludes *x = excludes;
+       while (x) {
+               if (fnmatch(x->path, pathname, 0) == 0)
+                       return 0;
+               x = x->next;
+       }
+       return 1;
+}
+
 static int apply_patch(int fd)
 {
        int newfd;
        unsigned long offset, size;
        char *buffer = read_patch_file(fd, &size);
        struct patch *list = NULL, **listp = &list;
+       int skipped_patch = 0;
 
        if (!buffer)
                return -1;
@@ -1377,9 +1395,15 @@ static int apply_patch(int fd)
                nr = parse_chunk(buffer + offset, size, patch);
                if (nr < 0)
                        break;
-               patch_stats(patch);
-               *listp = patch;
-               listp = &patch->next;
+               if (use_patch(patch)) {
+                       patch_stats(patch);
+                       *listp = patch;
+                       listp = &patch->next;
+               } else {
+                       /* perhaps free it a bit better? */
+                       free(patch);
+                       skipped_patch++;
+               }
                offset += nr;
                size -= nr;
        }
@@ -1397,7 +1421,7 @@ static int apply_patch(int fd)
                exit(1);
 
        if (apply)
-               write_out_results(list);
+               write_out_results(list, skipped_patch);
 
        if (write_index) {
                if (write_cache(newfd, active_cache, active_nr) ||
@@ -1432,6 +1456,13 @@ int main(int argc, char **argv)
                        read_stdin = 0;
                        continue;
                }
+               if (!strncmp(arg, "--exclude=", 10)) {
+                       struct excludes *x = xmalloc(sizeof(*x));
+                       x->path = arg + 10;
+                       x->next = excludes;
+                       excludes = x;
+                       continue;
+               }
                /* NEEDSWORK: this does not do anything at this moment. */
                if (!strcmp(arg, "--no-merge")) {
                        merge_patch = 0;