[PATCH v3 3/3] test-tool: retire "index-version"

[Junio C Hamano <gitster@pobox.com>]

As "git update-index --show-index-version" can do the same thing,
the 'index-version' subcommand in the test-tool lost its reason to
exist.  Remove it and replace its use with the end-user facing
'git update-index --show-index-version'.

Helped-by: Linus Arver <linusa@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 Makefile                              |  1 -
 t/helper/test-index-version.c         | 15 ---------------
 t/helper/test-tool.c                  |  1 -
 t/helper/test-tool.h                  |  1 -
 t/t1600-index.sh                      |  2 +-
 t/t1700-split-index.sh                |  2 +-
 t/t2104-update-index-skip-worktree.sh |  6 +++---
 7 files changed, 5 insertions(+), 23 deletions(-)
 delete mode 100644 t/helper/test-index-version.c

diff --git a/Makefile b/Makefile
index e440728c24..5323c76aa0 100644
--- a/Makefile
+++ b/Makefile
@@ -808,7 +808,6 @@ TEST_BUILTINS_OBJS += test-hash-speed.o
 TEST_BUILTINS_OBJS += test-hash.o
 TEST_BUILTINS_OBJS += test-hashmap.o
 TEST_BUILTINS_OBJS += test-hexdump.o
-TEST_BUILTINS_OBJS += test-index-version.o
 TEST_BUILTINS_OBJS += test-json-writer.o
 TEST_BUILTINS_OBJS += test-lazy-init-name-hash.o
 TEST_BUILTINS_OBJS += test-match-trees.o
diff --git a/t/helper/test-index-version.c b/t/helper/test-index-version.c
deleted file mode 100644
index a06c45c1f8..0000000000
--- a/t/helper/test-index-version.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include "test-tool.h"
-#include "cache.h"
-
-int cmd__index_version(int argc UNUSED, const char **argv UNUSED)
-{
-	struct cache_header hdr;
-	int version;
-
-	memset(&hdr,0,sizeof(hdr));
-	if (read(0, &hdr, sizeof(hdr)) != sizeof(hdr))
-		return 0;
-	version = ntohl(hdr.hdr_version);
-	printf("%d\n", version);
-	return 0;
-}
diff --git a/t/helper/test-tool.c b/t/helper/test-tool.c
index abe8a785eb..621ac3dd10 100644
--- a/t/helper/test-tool.c
+++ b/t/helper/test-tool.c
@@ -38,7 +38,6 @@ static struct test_cmd cmds[] = {
 	{ "hashmap", cmd__hashmap },
 	{ "hash-speed", cmd__hash_speed },
 	{ "hexdump", cmd__hexdump },
-	{ "index-version", cmd__index_version },
 	{ "json-writer", cmd__json_writer },
 	{ "lazy-init-name-hash", cmd__lazy_init_name_hash },
 	{ "match-trees", cmd__match_trees },
diff --git a/t/helper/test-tool.h b/t/helper/test-tool.h
index ea2672436c..a641c3a81d 100644
--- a/t/helper/test-tool.h
+++ b/t/helper/test-tool.h
@@ -32,7 +32,6 @@ int cmd__getcwd(int argc, const char **argv);
 int cmd__hashmap(int argc, const char **argv);
 int cmd__hash_speed(int argc, const char **argv);
 int cmd__hexdump(int argc, const char **argv);
-int cmd__index_version(int argc, const char **argv);
 int cmd__json_writer(int argc, const char **argv);
 int cmd__lazy_init_name_hash(int argc, const char **argv);
 int cmd__match_trees(int argc, const char **argv);
diff --git a/t/t1600-index.sh b/t/t1600-index.sh
index 9368d82f7d..62e7fd1596 100755
--- a/t/t1600-index.sh
+++ b/t/t1600-index.sh
@@ -118,7 +118,7 @@ test_index_version () {
 		fi &&
 		git add a &&
 		echo $EXPECTED_OUTPUT_VERSION >expect &&
-		test-tool index-version <.git/index >actual &&
+		git update-index --show-index-version >actual &&
 		test_cmp expect actual
 	)
 }
diff --git a/t/t1700-split-index.sh b/t/t1700-split-index.sh
index b4ab166369..a7b7263b35 100755
--- a/t/t1700-split-index.sh
+++ b/t/t1700-split-index.sh
@@ -43,7 +43,7 @@ test_expect_success 'enable split index' '
 	git config splitIndex.maxPercentChange 100 &&
 	git update-index --split-index &&
 	test-tool dump-split-index .git/index >actual &&
-	indexversion=$(test-tool index-version <.git/index) &&
+	indexversion=$(git update-index --show-index-version) &&
 
 	# NEEDSWORK: Stop hard-coding checksums.
 	if test "$indexversion" = "4"
diff --git a/t/t2104-update-index-skip-worktree.sh b/t/t2104-update-index-skip-worktree.sh
index b8686aabd3..0bab134d71 100755
--- a/t/t2104-update-index-skip-worktree.sh
+++ b/t/t2104-update-index-skip-worktree.sh
@@ -39,7 +39,7 @@ test_expect_success 'setup' '
 '
 
 test_expect_success 'index is at version 2' '
-	test "$(test-tool index-version < .git/index)" = 2
+	test "$(git update-index --show-index-version)" = 2
 '
 
 test_expect_success 'update-index --skip-worktree' '
@@ -48,7 +48,7 @@ test_expect_success 'update-index --skip-worktree' '
 '
 
 test_expect_success 'index is at version 3 after having some skip-worktree entries' '
-	test "$(test-tool index-version < .git/index)" = 3
+	test "$(git update-index --show-index-version)" = 3
 '
 
 test_expect_success 'ls-files -t' '
@@ -61,7 +61,7 @@ test_expect_success 'update-index --no-skip-worktree' '
 '
 
 test_expect_success 'index version is back to 2 when there is no skip-worktree entry' '
-	test "$(test-tool index-version < .git/index)" = 2
+	test "$(git update-index --show-index-version)" = 2
 '
 
 test_done
-- 
2.42.0-158-g94e83dcf5b