[PATCH v4 2/2] repack: die on incremental + write-bitmap-index

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The bitmap index only works for single packs, so requesting an
incremental repack with bitmap indexes makes no sense.

Signed-off-by: David Turner <dturner@xxxxxxxxxxxx>
---
 builtin/repack.c        | 9 +++++++++
 t/t5310-pack-bitmaps.sh | 8 +++-----
 t/t6500-gc.sh           | 8 ++++----
 3 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/builtin/repack.c b/builtin/repack.c
index 80dd06b..9c3dd09 100644
--- a/builtin/repack.c
+++ b/builtin/repack.c
@@ -18,6 +18,12 @@ static const char *const git_repack_usage[] = {
 	NULL
 };
 
+static const char incremental_bitmap_conflict_error[] = N_(
+"Incremental repacks are incompatible with bitmap indexes.  Use \n"
+"--no-write-bitmap-index or disable the pack.writebitmaps configuration."
+);
+
+
 static int repack_config(const char *var, const char *value, void *cb)
 {
 	if (!strcmp(var, "repack.usedeltabaseoffset")) {
@@ -206,6 +212,9 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 	if (pack_kept_objects < 0)
 		pack_kept_objects = write_bitmaps;
 
+	if (write_bitmaps && !(pack_everything & ALL_INTO_ONE))
+		die(incremental_bitmap_conflict_error);
+
 	packdir = mkpathdup("%s/pack", get_object_directory());
 	packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid());
 
diff --git a/t/t5310-pack-bitmaps.sh b/t/t5310-pack-bitmaps.sh
index b4c7a6f..424bec7 100755
--- a/t/t5310-pack-bitmaps.sh
+++ b/t/t5310-pack-bitmaps.sh
@@ -118,12 +118,10 @@ test_expect_success 'fetch (partial bitmap)' '
 	test_cmp expect actual
 '
 
-test_expect_success 'incremental repack cannot create bitmaps' '
+test_expect_success 'incremental repack fails when bitmaps are requested' '
 	test_commit more-1 &&
-	find .git/objects/pack -name "*.bitmap" >expect &&
-	git repack -d &&
-	find .git/objects/pack -name "*.bitmap" >actual &&
-	test_cmp expect actual
+	test_must_fail git repack -d 2>err &&
+	test_i18ngrep "Incremental repacks are incompatible with bitmap" err
 '
 
 test_expect_success 'incremental repack can disable bitmaps' '
diff --git a/t/t6500-gc.sh b/t/t6500-gc.sh
index def2aca..1762dfa 100755
--- a/t/t6500-gc.sh
+++ b/t/t6500-gc.sh
@@ -54,15 +54,15 @@ test_expect_success 'auto gc with too many loose objects does not attempt to cre
 	test_commit 410 &&
 	# Our first gc will create a pack; our second will create a second pack
 	git gc --auto &&
-	ls .git/objects/pack | grep -v bitmap | sort >existing_packs &&
+	ls .git/objects/pack | sort >existing_packs &&
 	test_commit 523 &&
 	test_commit 790 &&
 
 	git gc --auto 2>err &&
 	test_i18ngrep ! "^warning:" err &&
-	ls .git/objects/pack/ | grep -v bitmap | sort >post_packs &&
-	comm --output-delimiter , -1 -3 existing_packs post_packs >new &&
-	comm --output-delimiter , -2 -3 existing_packs post_packs >del &&
+	ls .git/objects/pack/ | sort >post_packs &&
+	comm -1 -3 existing_packs post_packs >new &&
+	comm -2 -3 existing_packs post_packs >del &&
 	test_line_count = 0 del && # No packs are deleted
 	test_line_count = 2 new # There is one new pack and its .idx
 '
-- 
2.8.0.rc4.22.g8ae061a




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