tag: support configuring --sort via .gitconfig

Add support for configuring default sort ordering for git tags. Command
line option will override this configured value, using the exact same
syntax.

Cc: Jeff King <peff@peff.net>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/t/t7004-tag.sh b/t/t7004-tag.sh
index 66010b0..0366653 100755
--- a/t/t7004-tag.sh
+++ b/t/t7004-tag.sh
@@ -1423,6 +1423,42 @@ test_expect_success 'reverse lexical sort' '
 	test_cmp expect actual
 '
 
+test_expect_success 'configured lexical sort' '
+	git config tag.sort "v:refname" &&
+	git tag -l "foo*" >actual &&
+	cat >expect <<-\EOF &&
+	foo1.3
+	foo1.6
+	foo1.10
+	EOF
+	test_cmp expect actual
+'
+
+test_expect_success 'option override configured sort' '
+	git tag -l --sort=-refname "foo*" >actual &&
+	cat >expect <<-\EOF &&
+	foo1.6
+	foo1.3
+	foo1.10
+	EOF
+	test_cmp expect actual
+'
+
+test_expect_success 'invalid sort parameter on command line' '
+	test_must_fail git tag -l --sort=notvalid "foo*" >actual
+'
+
+test_expect_success 'invalid sort parameter in configuratoin' '
+	git config tag.sort "v:notvalid" &&
+	git tag -l "foo*" >actual &&
+	cat >expect <<-\EOF &&
+	foo1.10
+	foo1.3
+	foo1.6
+	EOF
+	test_cmp expect actual
+'
+
 run_with_limited_stack () {
 	(ulimit -s 64 && "$@")
 }