git-fetch/push/pull: documentation.

diff --git a/local-fetch.c b/local-fetch.c
index b3947a96574774c6a2aa17fa4f181a8b6c55838f..87a93de02f759f544ebfd1d6fb584886f483fbfc 100644 (file)
--- a/local-fetch.c
+++ b/local-fetch.c
@@ -52,7 +52,8 @@ static int setup_indices(void)
        return 0;
 }
 
-static int copy_file(const char *source, const char *dest, const char *hex)
+static int copy_file(const char *source, const char *dest, const char *hex,
+                    int warn_if_not_exists)
 {
        if (use_link) {
                if (!link(source, dest)) {
@@ -61,13 +62,24 @@ static int copy_file(const char *source, const char *dest, const char *hex)
                }
                /* If we got ENOENT there is no point continuing. */
                if (errno == ENOENT) {
-                       fprintf(stderr, "does not exist %s\n", source);
+                       if (warn_if_not_exists)
+                               fprintf(stderr, "does not exist %s\n", source);
                        return -1;
                }
        }
-       if (use_symlink && !symlink(source, dest)) {
-               pull_say("symlink %s\n", hex);
-               return 0;
+       if (use_symlink) {
+               struct stat st;
+               if (stat(source, &st)) {
+                       if (!warn_if_not_exists && errno == ENOENT)
+                               return -1;
+                       fprintf(stderr, "cannot stat %s: %s\n", source,
+                               strerror(errno));
+                       return -1;
+               }
+               if (!symlink(source, dest)) {
+                       pull_say("symlink %s\n", hex);
+                       return 0;
+               }
        }
        if (use_filecopy) {
                int ifd, ofd, status;
@@ -75,7 +87,11 @@ static int copy_file(const char *source, const char *dest, const char *hex)
                void *map;
                ifd = open(source, O_RDONLY);
                if (ifd < 0 || fstat(ifd, &st) < 0) {
-                       close(ifd);
+                       int err = errno;
+                       if (ifd >= 0)
+                               close(ifd);
+                       if (!warn_if_not_exists && err == ENOENT)
+                               return -1;
                        fprintf(stderr, "cannot open %s\n", source);
                        return -1;
                }
@@ -89,7 +105,8 @@ static int copy_file(const char *source, const char *dest, const char *hex)
                status = ((ofd < 0) ||
                          (write(ofd, map, st.st_size) != st.st_size));
                munmap(map, st.st_size);
-               close(ofd);
+               if (ofd >= 0)
+                       close(ofd);
                if (status)
                        fprintf(stderr, "cannot write %s\n", dest);
                else
@@ -119,11 +136,11 @@ static int fetch_pack(const unsigned char *sha1)
        sprintf(filename, "%s/objects/pack/pack-%s.pack", 
                path, sha1_to_hex(target->sha1));
        copy_file(filename, sha1_pack_name(target->sha1),
-                 sha1_to_hex(target->sha1));
+                 sha1_to_hex(target->sha1), 1);
        sprintf(filename, "%s/objects/pack/pack-%s.idx", 
                path, sha1_to_hex(target->sha1));
        copy_file(filename, sha1_pack_index_name(target->sha1),
-                 sha1_to_hex(target->sha1));
+                 sha1_to_hex(target->sha1), 1);
        install_packed_git(target);
        return 0;
 }
@@ -144,12 +161,15 @@ static int fetch_file(const unsigned char *sha1)
        filename[object_name_start+1] = hex[1];
        filename[object_name_start+2] = '/';
        strcpy(filename + object_name_start + 3, hex + 2);
-       return copy_file(filename, dest_filename, hex);
+       return copy_file(filename, dest_filename, hex, 0);
 }
 
 int fetch(unsigned char *sha1)
 {
-       return fetch_file(sha1) && fetch_pack(sha1);
+       if (has_sha1_file(sha1))
+               return 0;
+       else
+               return fetch_file(sha1) && fetch_pack(sha1);
 }
 
 int fetch_ref(char *ref, unsigned char *sha1)
@@ -214,6 +234,8 @@ int main(int argc, char **argv)
                        get_verbosely = 1;
                else if (argv[arg][1] == 'w')
                        write_ref = argv[++arg];
+               else if (!strcmp(argv[arg], "--recover"))
+                       get_recover = 1;
                else
                        usage(local_pull_usage);
                arg++;