[PATCH v3 23/25] midx: respect 'GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP'

[Taylor Blau <me@ttaylorr.com>]

Introduce a new 'GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP' environment
variable to also write a multi-pack bitmap when
'GIT_TEST_MULTI_PACK_INDEX' is set.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
---
 builtin/repack.c          | 12 ++++++++++--
 ci/run-build-and-tests.sh |  1 +
 midx.h                    |  2 ++
 t/README                  |  4 ++++
 4 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/builtin/repack.c b/builtin/repack.c
index 5f9bc74adc..82ab668272 100644
--- a/builtin/repack.c
+++ b/builtin/repack.c
@@ -515,6 +515,10 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 		if (!(pack_everything & ALL_INTO_ONE) ||
 		    !is_bare_repository())
 			write_bitmaps = 0;
+	} else if (write_bitmaps &&
+		   git_env_bool(GIT_TEST_MULTI_PACK_INDEX, 0) &&
+		   git_env_bool(GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP, 0)) {
+		write_bitmaps = 0;
 	}
 	if (pack_kept_objects < 0)
 		pack_kept_objects = write_bitmaps > 0;
@@ -725,8 +729,12 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 		update_server_info(0);
 	remove_temporary_files();
 
-	if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX, 0))
-		write_midx_file(get_object_directory(), NULL, 0);
+	if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX, 0)) {
+		unsigned flags = 0;
+		if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP, 0))
+			flags |= MIDX_WRITE_BITMAP | MIDX_WRITE_REV_INDEX;
+		write_midx_file(get_object_directory(), NULL, flags);
+	}
 
 	string_list_clear(&names, 0);
 	string_list_clear(&rollback, 0);
diff --git a/ci/run-build-and-tests.sh b/ci/run-build-and-tests.sh
index 3ce81ffee9..7ee9ba9325 100755
--- a/ci/run-build-and-tests.sh
+++ b/ci/run-build-and-tests.sh
@@ -23,6 +23,7 @@ linux-gcc)
 	export GIT_TEST_COMMIT_GRAPH=1
 	export GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=1
 	export GIT_TEST_MULTI_PACK_INDEX=1
+	export GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=1
 	export GIT_TEST_ADD_I_USE_BUILTIN=1
 	export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
 	export GIT_TEST_WRITE_REV_INDEX=1
diff --git a/midx.h b/midx.h
index 350f4d0a7b..aa3da557bb 100644
--- a/midx.h
+++ b/midx.h
@@ -8,6 +8,8 @@ struct pack_entry;
 struct repository;
 
 #define GIT_TEST_MULTI_PACK_INDEX "GIT_TEST_MULTI_PACK_INDEX"
+#define GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP \
+	"GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP"
 
 struct multi_pack_index {
 	struct multi_pack_index *next;
diff --git a/t/README b/t/README
index 9e70122302..12014aa988 100644
--- a/t/README
+++ b/t/README
@@ -425,6 +425,10 @@ GIT_TEST_MULTI_PACK_INDEX=<boolean>, when true, forces the multi-pack-
 index to be written after every 'git repack' command, and overrides the
 'core.multiPackIndex' setting to true.
 
+GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=<boolean>, when true, sets the
+'--bitmap' option on all invocations of 'git multi-pack-index write',
+and ignores pack-objects' '--write-bitmap-index'.
+
 GIT_TEST_SIDEBAND_ALL=<boolean>, when true, overrides the
 'uploadpack.allowSidebandAll' setting to true, and when false, forces
 fetch-pack to not request sideband-all (even if the server advertises
-- 
2.31.1.163.ga65ce7f831