Merge branch 'jc/log-mailmap-flip-defaults'

Hotfix for making "git log" use the mailmap by default.

* jc/log-mailmap-flip-defaults:
  log: really flip the --mailmap default
  log: flip the --mailmap default unconditionally

Documentation/RelNotes/2.23.0.txt

@@ -10,6 +10,9 @@ Backward compatibility note
    prerequisite patches in an unstable way, which has been updated to
    compute in a way that is compatible with "git patch-id --stable".
 
+ * The "git log" command by default behaves as if the --mailmap option
+   was given.
+
 
 UI, Workflows & Features
 
@@ -91,11 +94,6 @@ UI, Workflows & Features
    commit-graph files now, which allows the commit-graph files to be
    updated incrementally.
 
- * The "git log" command learns to issue a warning when log.mailmap
-   configuration is not set and --[no-]mailmap option is not used, to
-   prepare users for future versions of Git that uses the mailmap by
-   default.
-
  * "git range-diff" output has been tweaked for easier identification
    of which part of what file the patch shown is about.
 

Documentation/config/log.txt

@@ -41,4 +41,4 @@ log.showSignature::
 log.mailmap::
 	If true, makes linkgit:git-log[1], linkgit:git-show[1], and
 	linkgit:git-whatchanged[1] assume `--use-mailmap`, otherwise
-	assume `--no-use-mailmap`. False by default.
+	assume `--no-use-mailmap`. True by default.

builtin/log.c

@@ -47,7 +47,7 @@ static int default_follow;
 static int default_show_signature;
 static int decoration_style;
 static int decoration_given;
-static int use_mailmap_config = -1;
+static int use_mailmap_config = 1;
 static const char *fmt_patch_subject_prefix = "PATCH";
 static const char *fmt_pretty;
 
@@ -156,21 +156,11 @@ static void cmd_log_init_defaults(struct rev_info *rev)
 		parse_date_format(default_date_mode, &rev->date_mode);
 }
 
-static char warn_unspecified_mailmap_msg[] =
-N_("log.mailmap is not set; its implicit value will change in an\n"
-   "upcoming release. To squelch this message and preserve current\n"
-   "behaviour, set the log.mailmap configuration value to false.\n"
-   "\n"
-   "To squelch this message and adopt the new behaviour now, set the\n"
-   "log.mailmap configuration value to true.\n"
-   "\n"
-   "See 'git help config' and search for 'log.mailmap' for further information.");
-
 static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
 			 struct rev_info *rev, struct setup_revision_opt *opt)
 {
 	struct userformat_want w;
-	int quiet = 0, source = 0, mailmap = 0;
+	int quiet = 0, source = 0, mailmap;
 	static struct line_opt_callback_data line_cb = {NULL, NULL, STRING_LIST_INIT_DUP};
 	static struct string_list decorate_refs_exclude = STRING_LIST_INIT_NODUP;
 	static struct string_list decorate_refs_include = STRING_LIST_INIT_NODUP;
@@ -214,13 +204,6 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
 	memset(&w, 0, sizeof(w));
 	userformat_find_requirements(NULL, &w);
 
-	if (mailmap < 0) {
-		if (session_is_interactive() && !rev->pretty_given)
-			warning("%s\n", _(warn_unspecified_mailmap_msg));
-
-		mailmap = 0;
-	}
-
 	if (!rev->show_notes_given && (!rev->pretty_given || w.notes))
 		rev->show_notes = 1;
 	if (rev->show_notes)

t/t4203-mailmap.sh

@@ -442,6 +442,34 @@ test_expect_success 'Log output with log.mailmap' '
 	test_cmp expect actual
 '
 
+test_expect_success 'log.mailmap=false disables mailmap' '
+	cat >expect <<-\EOF &&
+	Author: CTO <cto@coompany.xx>
+	Author: claus <me@company.xx>
+	Author: santa <me@company.xx>
+	Author: nick2 <nick2@company.xx>
+	Author: nick2 <bugs@company.xx>
+	Author: nick1 <bugs@company.xx>
+	Author: A U Thor <author@example.com>
+	EOF
+	git -c log.mailmap=False log | grep Author > actual &&
+	test_cmp expect actual
+'
+
+test_expect_success '--no-use-mailmap disables mailmap' '
+	cat >expect <<-\EOF &&
+	Author: CTO <cto@coompany.xx>
+	Author: claus <me@company.xx>
+	Author: santa <me@company.xx>
+	Author: nick2 <nick2@company.xx>
+	Author: nick2 <bugs@company.xx>
+	Author: nick1 <bugs@company.xx>
+	Author: A U Thor <author@example.com>
+	EOF
+	git log --no-use-mailmap | grep Author > actual &&
+	test_cmp expect actual
+'
+
 cat >expect <<\EOF
 Author: Santa Claus <santa.claus@northpole.xx>
 Author: Santa Claus <santa.claus@northpole.xx>
@@ -461,6 +489,11 @@ test_expect_success 'Grep author with log.mailmap' '
 	test_cmp expect actual
 '
 
+test_expect_success 'log.mailmap is true by default these days' '
+	git log --author Santa | grep Author >actual &&
+	test_cmp expect actual
+'
+
 test_expect_success 'Only grep replaced author with --use-mailmap' '
 	git log --use-mailmap --author "<cto@coompany.xx>" >actual &&
 	test_must_be_empty actual

t/t7006-pager.sh

@@ -7,8 +7,6 @@ test_description='Test automatic use of a pager.'
 . "$TEST_DIRECTORY"/lib-terminal.sh
 
 test_expect_success 'setup' '
-	: squelch advice messages during the transition &&
-	git config --global log.mailmap false &&
 	sane_unset GIT_PAGER GIT_PAGER_IN_USE &&
 	test_unconfig core.pager &&