[PATCH] Support packs in local-pull

If it doesn't find an object, it looks for an index that contains it
and uses the same methods on that instead.

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/local-pull.c b/local-pull.c
index b715203..7e47ec0 100644 (file)
--- a/local-pull.c
+++ b/local-pull.c
@@ -15,34 +15,54 @@ void prefetch(unsigned char *sha1)
 {
 }
 
-int fetch(unsigned char *sha1)
+static struct packed_git *packs = NULL;
+
+void setup_index(unsigned char *sha1)
 {
-       static int object_name_start = -1;
-       static char filename[PATH_MAX];
-       char *hex = sha1_to_hex(sha1);
-       const char *dest_filename = sha1_file_name(sha1);
+       struct packed_git *new_pack;
+       char filename[PATH_MAX];
+       strcpy(filename, path);
+       strcat(filename, "/objects/pack/pack-");
+       strcat(filename, sha1_to_hex(sha1));
+       strcat(filename, ".idx");
+       new_pack = parse_pack_index_file(sha1, filename);
+       new_pack->next = packs;
+       packs = new_pack;
+}
 
-       if (object_name_start < 0) {
-               strcpy(filename, path); /* e.g. git.git */
-               strcat(filename, "/objects/");
-               object_name_start = strlen(filename);
+int setup_indices()
+{
+       DIR *dir;
+       struct dirent *de;
+       char filename[PATH_MAX];
+       unsigned char sha1[20];
+       sprintf(filename, "%s/objects/pack/", path);
+       dir = opendir(filename);
+       while ((de = readdir(dir)) != NULL) {
+               int namelen = strlen(de->d_name);
+               if (namelen != 50 || 
+                   strcmp(de->d_name + namelen - 5, ".pack"))
+                       continue;
+               get_sha1_hex(sha1, de->d_name + 5);
+               setup_index(sha1);
        }
-       filename[object_name_start+0] = hex[0];
-       filename[object_name_start+1] = hex[1];
-       filename[object_name_start+2] = '/';
-       strcpy(filename + object_name_start + 3, hex + 2);
+       return 0;
+}
+
+int copy_file(const char *source, const char *dest, const char *hex)
+{
        if (use_link) {
-               if (!link(filename, dest_filename)) {
+               if (!link(source, dest)) {
                        pull_say("link %s\n", hex);
                        return 0;
                }
                /* If we got ENOENT there is no point continuing. */
                if (errno == ENOENT) {
-                       fprintf(stderr, "does not exist %s\n", filename);
+                       fprintf(stderr, "does not exist %s\n", source);
                        return -1;
                }
        }
-       if (use_symlink && !symlink(filename, dest_filename)) {
+       if (use_symlink && !symlink(source, dest)) {
                pull_say("symlink %s\n", hex);
                return 0;
        }
@@ -50,25 +70,25 @@ int fetch(unsigned char *sha1)
                int ifd, ofd, status;
                struct stat st;
                void *map;
-               ifd = open(filename, O_RDONLY);
+               ifd = open(source, O_RDONLY);
                if (ifd < 0 || fstat(ifd, &st) < 0) {
                        close(ifd);
-                       fprintf(stderr, "cannot open %s\n", filename);
+                       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", filename);
+                       fprintf(stderr, "cannot mmap %s\n", source);
                        return -1;
                }
-               ofd = open(dest_filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
+               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);
                close(ofd);
                if (status)
-                       fprintf(stderr, "cannot write %s\n", dest_filename);
+                       fprintf(stderr, "cannot write %s\n", dest);
                else
                        pull_say("copy %s\n", hex);
                return status;
@@ -77,6 +97,56 @@ int fetch(unsigned char *sha1)
        return -1;
 }
 
+int fetch_pack(unsigned char *sha1)
+{
+       struct packed_git *target;
+       char filename[PATH_MAX];
+       if (setup_indices())
+               return -1;
+       target = find_sha1_pack(sha1, packs);
+       if (!target)
+               return error("Couldn't find %s: not separate or in any pack", 
+                            sha1_to_hex(sha1));
+       if (get_verbosely) {
+               fprintf(stderr, "Getting pack %s\n",
+                       sha1_to_hex(target->sha1));
+               fprintf(stderr, " which contains %s\n",
+                       sha1_to_hex(sha1));
+       }
+       sprintf(filename, "%s/objects/pack/pack-%s.pack", 
+               path, sha1_to_hex(sha1));
+       copy_file(filename, sha1_pack_name(sha1), sha1_to_hex(sha1));
+       sprintf(filename, "%s/objects/pack/pack-%s.idx", 
+               path, sha1_to_hex(sha1));
+       copy_file(filename, sha1_pack_index_name(sha1), sha1_to_hex(sha1));
+       install_packed_git(target);
+       return 0;
+}
+
+int fetch_file(unsigned char *sha1)
+{
+       static int object_name_start = -1;
+       static char filename[PATH_MAX];
+       char *hex = sha1_to_hex(sha1);
+       const char *dest_filename = sha1_file_name(sha1);
+
+       if (object_name_start < 0) {
+               strcpy(filename, path); /* e.g. git.git */
+               strcat(filename, "/objects/");
+               object_name_start = strlen(filename);
+       }
+       filename[object_name_start+0] = hex[0];
+       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);
+}
+
+int fetch(unsigned char *sha1)
+{
+       return fetch_file(sha1) && fetch_pack(sha1);
+}
+
 int fetch_ref(char *ref, unsigned char *sha1)
 {
        static int ref_name_start = -1;