builtin/repack: replace hard-coded constants

Note that while the error messages here are not translated, the end user
should never see them.  We invoke git pack-objects shortly before both
invocations, so we can be fairly certain that the data we're receiving
is in fact valid.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/repack.c b/builtin/repack.c
index c6a7943d5cb108dbccdfd502d799ab71a9e7e146..0223f2880ceaec57d10aadb4fcce7a28ce670cc4 100644 (file)
--- a/builtin/repack.c
+++ b/builtin/repack.c
@@ -235,8 +235,8 @@ static void repack_promisor_objects(const struct pack_objects_args *args,
        while (strbuf_getline_lf(&line, out) != EOF) {
                char *promisor_name;
                int fd;
-               if (line.len != 40)
-                       die("repack: Expecting 40 character sha1 lines only from pack-objects.");
+               if (line.len != the_hash_algo->hexsz)
+                       die("repack: Expecting full hex object ID lines only from pack-objects.");
                string_list_append(names, line.buf);
 
                /*
@@ -407,8 +407,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 
        out = xfdopen(cmd.out, "r");
        while (strbuf_getline_lf(&line, out) != EOF) {
-               if (line.len != 40)
-                       die("repack: Expecting 40 character sha1 lines only from pack-objects.");
+               if (line.len != the_hash_algo->hexsz)
+                       die("repack: Expecting full hex object ID lines only from pack-objects.");
                string_list_append(&names, line.buf);
        }
        fclose(out);
@@ -535,14 +535,15 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
        reprepare_packed_git(the_repository);
 
        if (delete_redundant) {
+               const int hexsz = the_hash_algo->hexsz;
                int opts = 0;
                string_list_sort(&names);
                for_each_string_list_item(item, &existing_packs) {
                        char *sha1;
                        size_t len = strlen(item->string);
-                       if (len < 40)
+                       if (len < hexsz)
                                continue;
-                       sha1 = item->string + len - 40;
+                       sha1 = item->string + len - hexsz;
                        if (!string_list_has_string(&names, sha1))
                                remove_redundant_pack(packdir, item->string);
                }