Do check_repository_format() early (re-fix)

This pushes check_repository_format() (actually _gently() version)
to setup_git_directory_gently() in order to prevent from
using unsupported repositories.

New setup_git_directory_gently()'s behaviour is stop searching
for a valid gitdir and return as if there is no gitdir if a
unsupported repository is found. Warning will be thrown in these
cases.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/t/t1302-repo-version.sh b/t/t1302-repo-version.sh
new file mode 100755
index 0000000000..37fc1c8d36
--- /dev/null
+++ b/t/t1302-repo-version.sh
@@ -0,0 +1,46 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Nguyễn Thái Ngọc Duy
+#
+
+test_description='Test repository version check'
+
+. ./test-lib.sh
+
+cat >test.patch <<EOF
+diff --git a/test.txt b/test.txt
+new file mode 100644
+--- /dev/null
++++ b/test.txt
+@@ -0,0 +1 @@
++123
+EOF
+
+test_create_repo "test"
+test_create_repo "test2"
+
+GIT_CONFIG=test2/.git/config git config core.repositoryformatversion 99 || exit 1
+
+test_expect_success 'gitdir selection on normal repos' '
+	(test "$(git config core.repositoryformatversion)" = 0 &&
+	cd test &&
+	test "$(git config core.repositoryformatversion)" = 0)'
+
+# Make sure it would stop at test2, not trash
+test_expect_success 'gitdir selection on unsupported repo' '
+	(cd test2 &&
+	test "$(git config core.repositoryformatversion)" = 99)'
+
+test_expect_success 'gitdir not required mode' '
+	(git apply --stat test.patch &&
+	cd test && git apply --stat ../test.patch &&
+	cd ../test2 && git apply --stat ../test.patch)'
+
+test_expect_success 'gitdir required mode on normal repos' '
+	(git apply --check --index test.patch &&
+	cd test && git apply --check --index ../test.patch)'
+
+test_expect_failure 'gitdir required mode on unsupported repo' '
+	(cd test2 && git apply --check --index ../test.patch)'
+
+test_done