Merge branch 'mj/log-show-signature-conf'

"git log" learns log.showSignature configuration variable, and a
command line option "--no-show-signature" to countermand it.

* mj/log-show-signature-conf:
  log: add log.showSignature configuration variable
  log: add "--no-show-signature" command line option
  t4202: refactor test

Documentation/git-log.txt

@@ -198,6 +198,10 @@ log.showRoot::
 	`git log -p` output would be shown without a diff attached.
 	The default is `true`.
 
+log.showSignature::
+	If `true`, `git log` and related commands will act as if the
+	`--show-signature` option was passed to them.
+
 mailmap.*::
 	See linkgit:git-shortlog[1].
 

builtin/log.c

@@ -33,6 +33,7 @@ static const char *default_date_mode = NULL;
 static int default_abbrev_commit;
 static int default_show_root = 1;
 static int default_follow;
+static int default_show_signature;
 static int decoration_style;
 static int decoration_given;
 static int use_mailmap_config;
@@ -119,6 +120,7 @@ static void cmd_log_init_defaults(struct rev_info *rev)
 	rev->abbrev_commit = default_abbrev_commit;
 	rev->show_root_diff = default_show_root;
 	rev->subject_prefix = fmt_patch_subject_prefix;
+	rev->show_signature = default_show_signature;
 	DIFF_OPT_SET(&rev->diffopt, ALLOW_TEXTCONV);
 
 	if (default_date_mode)
@@ -409,6 +411,10 @@ static int git_log_config(const char *var, const char *value, void *cb)
 		use_mailmap_config = git_config_bool(var, value);
 		return 0;
 	}
+	if (!strcmp(var, "log.showsignature")) {
+		default_show_signature = git_config_bool(var, value);
+		return 0;
+	}
 
 	if (grep_config(var, value, cb) < 0)
 		return -1;

revision.c

@@ -1871,6 +1871,8 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
 		revs->notes_opt.use_default_notes = 1;
 	} else if (!strcmp(arg, "--show-signature")) {
 		revs->show_signature = 1;
+	} else if (!strcmp(arg, "--no-show-signature")) {
+		revs->show_signature = 0;
 	} else if (!strcmp(arg, "--show-linear-break") ||
 		   starts_with(arg, "--show-linear-break=")) {
 		if (starts_with(arg, "--show-linear-break="))

t/t4202-log.sh

@@ -860,12 +860,15 @@ test_expect_success 'dotdot is a parent directory' '
 	test_cmp expect actual
 '
 
-test_expect_success GPG 'log --graph --show-signature' '
+test_expect_success GPG 'setup signed branch' '
 	test_when_finished "git reset --hard && git checkout master" &&
 	git checkout -b signed master &&
 	echo foo >foo &&
 	git add foo &&
-	git commit -S -m signed_commit &&
+	git commit -S -m signed_commit
+'
+
+test_expect_success GPG 'log --graph --show-signature' '
 	git log --graph --show-signature -n1 signed >actual &&
 	grep "^| gpg: Signature made" actual &&
 	grep "^| gpg: Good signature" actual
@@ -890,6 +893,31 @@ test_expect_success GPG 'log --graph --show-signature for merged tag' '
 	grep "^| | gpg: Good signature" actual
 '
 
+test_expect_success GPG '--no-show-signature overrides --show-signature' '
+	git log -1 --show-signature --no-show-signature signed >actual &&
+	! grep "^gpg:" actual
+'
+
+test_expect_success GPG 'log.showsignature=true behaves like --show-signature' '
+	test_config log.showsignature true &&
+	git log -1 signed >actual &&
+	grep "gpg: Signature made" actual &&
+	grep "gpg: Good signature" actual
+'
+
+test_expect_success GPG '--no-show-signature overrides log.showsignature=true' '
+	test_config log.showsignature true &&
+	git log -1 --no-show-signature signed >actual &&
+	! grep "^gpg:" actual
+'
+
+test_expect_success GPG '--show-signature overrides log.showsignature=false' '
+	test_config log.showsignature false &&
+	git log -1 --show-signature signed >actual &&
+	grep "gpg: Signature made" actual &&
+	grep "gpg: Good signature" actual
+'
+
 test_expect_success 'log --graph --no-walk is forbidden' '
 	test_must_fail git log --graph --no-walk
 '

t/t7510-signed-commit.sh

@@ -210,4 +210,11 @@ test_expect_success GPG 'show lack of signature with custom format' '
 	test_cmp expect actual
 '
 
+test_expect_success GPG 'log.showsignature behaves like --show-signature' '
+	test_config log.showsignature true &&
+	git show initial >actual &&
+	grep "gpg: Signature made" actual &&
+	grep "gpg: Good signature" actual
+'
+
 test_done