[PATCH 3/3] var: allow GIT_EDITOR to return null

["Sean Allred via GitGitGadget" <gitgitgadget@xxxxxxxxx>]

From: Sean Allred <allred.sean@xxxxxxxxx>

The handling to die early when there is no EDITOR is valuable when
used in normal code (i.e., editor.c). In git-var, where
null/empty-string is a perfectly valid value to return, it doesn't
make as much sense.

Remove this handling from `git var GIT_EDITOR` so that it does not
fail so noisily when there is no defined editor.

Signed-off-by: Sean Allred <allred.sean@xxxxxxxxx>
---
 builtin/var.c      |  7 +----
 t/t0007-git-var.sh | 69 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+), 6 deletions(-)

diff --git a/builtin/var.c b/builtin/var.c
index e215cd3b0c0..77e9ef3081a 100644
--- a/builtin/var.c
+++ b/builtin/var.c
@@ -11,12 +11,7 @@ static const char var_usage[] = "git var (-l | <variable>)";
 
 static const char *editor(int flag)
 {
-	const char *pgm = git_editor();
-
-	if (!pgm && flag & IDENT_STRICT)
-		die("Terminal is dumb, but EDITOR unset");
-
-	return pgm;
+    return git_editor();
 }
 
 static const char *pager(int flag)
diff --git a/t/t0007-git-var.sh b/t/t0007-git-var.sh
index e56f4b9ac59..bdef271c92a 100755
--- a/t/t0007-git-var.sh
+++ b/t/t0007-git-var.sh
@@ -47,6 +47,75 @@ test_expect_success 'get GIT_DEFAULT_BRANCH with configuration' '
 	)
 '
 
+test_expect_success 'get GIT_EDITOR without configuration' '
+	(
+		sane_unset GIT_EDITOR &&
+		sane_unset VISUAL &&
+		sane_unset EDITOR &&
+		>expect &&
+		! git var GIT_EDITOR >actual &&
+		test_cmp expect actual
+	)
+'
+
+test_expect_success 'get GIT_EDITOR with configuration' '
+	test_config core.editor foo &&
+	(
+		sane_unset GIT_EDITOR &&
+		sane_unset VISUAL &&
+		sane_unset EDITOR &&
+		echo foo >expect &&
+		git var GIT_EDITOR >actual &&
+		test_cmp expect actual
+	)
+'
+
+test_expect_success 'get GIT_EDITOR with environment variable GIT_EDITOR' '
+	(
+		sane_unset GIT_EDITOR &&
+		sane_unset VISUAL &&
+		sane_unset EDITOR &&
+		echo bar >expect &&
+		GIT_EDITOR=bar git var GIT_EDITOR >actual &&
+		test_cmp expect actual
+	)
+'
+
+test_expect_success 'get GIT_EDITOR with environment variable EDITOR' '
+	(
+		sane_unset GIT_EDITOR &&
+		sane_unset VISUAL &&
+		sane_unset EDITOR &&
+		echo bar >expect &&
+		EDITOR=bar git var GIT_EDITOR >actual &&
+		test_cmp expect actual
+	)
+'
+
+test_expect_success 'get GIT_EDITOR with configuration and environment variable GIT_EDITOR' '
+	test_config core.editor foo &&
+	(
+		sane_unset GIT_EDITOR &&
+		sane_unset VISUAL &&
+		sane_unset EDITOR &&
+		echo bar >expect &&
+		GIT_EDITOR=bar git var GIT_EDITOR >actual &&
+		test_cmp expect actual
+	)
+'
+
+test_expect_success 'get GIT_EDITOR with configuration and environment variable EDITOR' '
+	test_config core.editor foo &&
+	(
+		sane_unset GIT_EDITOR &&
+		sane_unset VISUAL &&
+		sane_unset EDITOR &&
+		echo foo >expect &&
+		EDITOR=bar git var GIT_EDITOR >actual &&
+		test_cmp expect actual
+	)
+'
+
 # For git var -l, we check only a representative variable;
 # testing the whole output would make our test too brittle with
 # respect to unrelated changes in the test suite's environment.
-- 
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