pack-objects --unpacked=<existing pack> option.

Incremental repack without -a essentially boils down to:

	rev-list --objects --unpacked --all |
        pack-objects $new_pack

which picks up all loose objects that are still live and creates
a new pack.

This implements --unpacked=<existing pack> option to tell the
revision walking machinery to pretend as if objects in such a
pack are unpacked for the purpose of object listing.  With this,
we could say:

	rev-list --objects --unpacked=$active_pack --all |
	pack-objects $new_pack

instead, to mean "all live loose objects but pretend as if
objects that are in this pack are also unpacked".  The newly
created pack would be perfect for updating $active_pack by
replacing it.

Since pack-objects now knows how to do the rev-list's work
itself internally, you can also write the above example by:

	pack-objects --unpacked=$active_pack --all $new_pack </dev/null

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/builtin-count-objects.c b/builtin-count-objects.c
index 1d3729aa9914d6c68dbb6ad11cb46504b4a688e0..73c59824238f58c2dc94544ef67ea51741d834ac 100644 (file)
--- a/builtin-count-objects.c
+++ b/builtin-count-objects.c
@@ -62,7 +62,7 @@ static void count_objects(DIR *d, char *path, int len, int verbose,
                hex[40] = 0;
                if (get_sha1_hex(hex, sha1))
                        die("internal error");
-               if (has_sha1_pack(sha1))
+               if (has_sha1_pack(sha1, NULL))
                        (*packed_loose)++;
        }
 }

diff --git a/builtin-prune-packed.c b/builtin-prune-packed.c
index d3dd94d9ef7a50e156488ea5e9236d6d55f6e190..960db49859a286bf5f3515ee7c2bfe25fe44d09e 100644 (file)
--- a/builtin-prune-packed.c
+++ b/builtin-prune-packed.c
@@ -19,7 +19,7 @@ static void prune_dir(int i, DIR *dir, char *pathname, int len)
                memcpy(hex+2, de->d_name, 38);
                if (get_sha1_hex(hex, sha1))
                        continue;
-               if (!has_sha1_pack(sha1))
+               if (!has_sha1_pack(sha1, NULL))
                        continue;
                memcpy(pathname + len, de->d_name, 38);
                if (dryrun)

diff --git a/cache.h b/cache.h
index a53204f6d695cfe7fef3afdde296564dbcf37423..ac51ed1d28f2808d9c2315b566d8bd525ff22189 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -259,7 +259,7 @@ extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
 extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
 extern int move_temp_to_file(const char *tmpfile, const char *filename);
 
-extern int has_sha1_pack(const unsigned char *sha1);
+extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
 extern int has_sha1_file(const unsigned char *sha1);
 extern void *map_sha1_file(const unsigned char *sha1, unsigned long *);
 extern int legacy_loose_object(unsigned char *);

diff --git a/revision.c b/revision.c
index db01682750a4dfa820ea3f0e4a99e306aa6b075a..6a2539b623512917479be3e6601ee8b8bef4953d 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -416,7 +416,8 @@ static void limit_list(struct rev_info *revs)
 
                if (revs->max_age != -1 && (commit->date < revs->max_age))
                        obj->flags |= UNINTERESTING;
-               if (revs->unpacked && has_sha1_pack(obj->sha1))
+               if (revs->unpacked &&
+                   has_sha1_pack(obj->sha1, revs->ignore_packed))
                        obj->flags |= UNINTERESTING;
                add_parents_to_list(revs, commit, &list);
                if (obj->flags & UNINTERESTING) {
@@ -671,6 +672,16 @@ int handle_revision_arg(const char *arg, struct rev_info *revs,
        return 0;
 }
 
+static void add_ignore_packed(struct rev_info *revs, const char *name)
+{
+       int num = ++revs->num_ignore_packed;
+
+       revs->ignore_packed = xrealloc(revs->ignore_packed,
+                                      sizeof(const char **) * (num + 1));
+       revs->ignore_packed[num-1] = name;
+       revs->ignore_packed[num] = NULL;
+}
+
 /*
  * Parse revision information, filling in the "rev_info" structure,
  * and removing the used arguments from the argument list.
@@ -811,6 +822,14 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                        }
                        if (!strcmp(arg, "--unpacked")) {
                                revs->unpacked = 1;
+                               free(revs->ignore_packed);
+                               revs->ignore_packed = NULL;
+                               revs->num_ignore_packed = 0;
+                               continue;
+                       }
+                       if (!strncmp(arg, "--unpacked=", 11)) {
+                               revs->unpacked = 1;
+                               add_ignore_packed(revs, arg+11);
                                continue;
                        }
                        if (!strcmp(arg, "-r")) {
@@ -1057,7 +1076,8 @@ struct commit *get_revision(struct rev_info *revs)
                 */
                if (!revs->limited) {
                        if ((revs->unpacked &&
-                            has_sha1_pack(commit->object.sha1)) ||
+                            has_sha1_pack(commit->object.sha1,
+                                          revs->ignore_packed)) ||
                            (revs->max_age != -1 &&
                             (commit->date < revs->max_age)))
                                continue;

diff --git a/revision.h b/revision.h
index c1f71afe6fa71075b64df03c1e9616f50325d29e..a5c35d05cbd6bceb12248dff0b1e5c3f3433aeae 100644 (file)
--- a/revision.h
+++ b/revision.h
@@ -38,7 +38,7 @@ struct rev_info {
                        blob_objects:1,
                        edge_hint:1,
                        limited:1,
-                       unpacked:1,
+                       unpacked:1, /* see also ignore_packed below */
                        boundary:1,
                        parents:1;
 
@@ -57,6 +57,10 @@ struct rev_info {
        unsigned int    shown_one:1,
                        abbrev_commit:1,
                        relative_date:1;
+
+       const char **ignore_packed; /* pretend objects in these are unpacked */
+       int num_ignore_packed;
+
        unsigned int    abbrev;
        enum cmit_fmt   commit_format;
        struct log_info *loginfo;

diff --git a/sha1_file.c b/sha1_file.c
index 428d791ba8e2f62e3c30627a8f9463236c77cc60..d5d048af677b67e550388bd599b78dc840ab91b6 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1189,12 +1189,20 @@ int find_pack_entry_one(const unsigned char *sha1,
        return 0;
 }
 
-static int find_pack_entry(const unsigned char *sha1, struct pack_entry *e)
+static int find_pack_entry(const unsigned char *sha1, struct pack_entry *e, const char **ignore_packed)
 {
        struct packed_git *p;
        prepare_packed_git();
 
        for (p = packed_git; p; p = p->next) {
+               if (ignore_packed) {
+                       const char **ig;
+                       for (ig = ignore_packed; *ig; ig++)
+                               if (!strcmp(p->pack_name, *ig))
+                                       break;
+                       if (*ig)
+                               continue;
+               }
                if (find_pack_entry_one(sha1, e, p))
                        return 1;
        }
@@ -1227,10 +1235,10 @@ int sha1_object_info(const unsigned char *sha1, char *type, unsigned long *sizep
        if (!map) {
                struct pack_entry e;
 
-               if (find_pack_entry(sha1, &e))
+               if (find_pack_entry(sha1, &e, NULL))
                        return packed_object_info(&e, type, sizep);
                reprepare_packed_git();
-               if (find_pack_entry(sha1, &e))
+               if (find_pack_entry(sha1, &e, NULL))
                        return packed_object_info(&e, type, sizep);
                return error("unable to find %s", sha1_to_hex(sha1));
        }
@@ -1253,7 +1261,7 @@ static void *read_packed_sha1(const unsigned char *sha1, char *type, unsigned lo
 {
        struct pack_entry e;
 
-       if (!find_pack_entry(sha1, &e)) {
+       if (!find_pack_entry(sha1, &e, NULL)) {
                error("cannot read sha1_file for %s", sha1_to_hex(sha1));
                return NULL;
        }
@@ -1266,7 +1274,7 @@ void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size
        void *map, *buf;
        struct pack_entry e;
 
-       if (find_pack_entry(sha1, &e))
+       if (find_pack_entry(sha1, &e, NULL))
                return read_packed_sha1(sha1, type, size);
        map = map_sha1_file(sha1, &mapsize);
        if (map) {
@@ -1275,7 +1283,7 @@ void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size
                return buf;
        }
        reprepare_packed_git();
-       if (find_pack_entry(sha1, &e))
+       if (find_pack_entry(sha1, &e, NULL))
                return read_packed_sha1(sha1, type, size);
        return NULL;
 }
@@ -1707,10 +1715,10 @@ int has_pack_file(const unsigned char *sha1)
        return 1;
 }
 
-int has_sha1_pack(const unsigned char *sha1)
+int has_sha1_pack(const unsigned char *sha1, const char **ignore_packed)
 {
        struct pack_entry e;
-       return find_pack_entry(sha1, &e);
+       return find_pack_entry(sha1, &e, ignore_packed);
 }
 
 int has_sha1_file(const unsigned char *sha1)
@@ -1718,7 +1726,7 @@ int has_sha1_file(const unsigned char *sha1)
        struct stat st;
        struct pack_entry e;
 
-       if (find_pack_entry(sha1, &e))
+       if (find_pack_entry(sha1, &e, NULL))
                return 1;
        return find_sha1_file(sha1, &st) ? 1 : 0;
 }