xdiff: generate "anti-diffs" aka what is common to two files

diff --git a/local-fetch.c b/local-fetch.c
index 0a071144b584a419270d0bc8bf34273b85962de0..ffa4887570319a2cbcf4042bd6e00063a48a4b6d 100644 (file)
--- a/local-fetch.c
+++ b/local-fetch.c
@@ -83,31 +83,23 @@ static int copy_file(const char *source, char *dest, const char *hex,
                }
        }
        if (use_filecopy) {
-               int ifd, ofd, status;
-               struct stat st;
-               void *map;
+               int ifd, ofd, status = 0;
+
                ifd = open(source, O_RDONLY);
-               if (ifd < 0 || fstat(ifd, &st) < 0) {
-                       int err = errno;
-                       if (ifd >= 0)
-                               close(ifd);
-                       if (!warn_if_not_exists && err == ENOENT)
+               if (ifd < 0) {
+                       if (!warn_if_not_exists && errno == ENOENT)
                                return -1;
                        fprintf(stderr, "cannot open %s\n", source);
                        return -1;
                }
-               map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, ifd, 0);
-               close(ifd);
-               if (map == MAP_FAILED) {
-                       fprintf(stderr, "cannot mmap %s\n", source);
+               ofd = open(dest, O_WRONLY | O_CREAT | O_EXCL, 0666);
+               if (ofd < 0) {
+                       fprintf(stderr, "cannot open %s\n", dest);
+                       close(ifd);
                        return -1;
                }
-               ofd = open(dest, O_WRONLY | O_CREAT | O_EXCL, 0666);
-               status = ((ofd < 0) ||
-                         (write(ofd, map, st.st_size) != st.st_size));
-               munmap(map, st.st_size);
-               if (ofd >= 0)
-                       close(ofd);
+               status = copy_fd(ifd, ofd);
+               close(ofd);
                if (status)
                        fprintf(stderr, "cannot write %s\n", dest);
                else
@@ -215,6 +207,9 @@ int main(int argc, char **argv)
        char *commit_id;
        int arg = 1;
 
+       setup_git_directory();
+       git_config(git_default_config);
+
        while (arg < argc && argv[arg][0] == '-') {
                if (argv[arg][1] == 't')
                        get_tree = 1;
@@ -245,6 +240,7 @@ int main(int argc, char **argv)
                usage(local_pull_usage);
        commit_id = argv[arg];
        path = argv[arg + 1];
+       write_ref_log_details = path;
 
        if (pull(commit_id))
                return 1;