builtin/config: introduce "remove-section" subcommand

Introduce a new "remove-section" subcommand to git-config(1). Please
refer to preceding commits regarding the motivation behind this change.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-config.txt

@@ -14,7 +14,7 @@ SYNOPSIS
 'git config set' [<file-option>] [--type=<type>] [--all] [--value=<value>] [--fixed-value] <name> <value>
 'git config unset' [<file-option>] [--all] [--value=<value>] [--fixed-value] <name> <value>
 'git config rename-section' [<file-option>] <old-name> <new-name>
-'git config' [<file-option>] --remove-section <name>
+'git config remove-section' [<file-option>] <name>
 'git config' [<file-option>] --get-colorbool <name> [<stdout-is-tty>]
 'git config' [<file-option>] -e | --edit
 
@@ -95,6 +95,9 @@ unset::
 rename-section::
 	Rename the given section to a new name.
 
+remove-section::
+	Remove the given section from the configuration file.
+
 [[OPTIONS]]
 OPTIONS
 -------
@@ -192,9 +195,6 @@ See also <<FILES>>.
 	section in linkgit:gitrevisions[7] for a more complete list of
 	ways to spell blob names.
 
---remove-section::
-	Remove the given section from the configuration file.
-
 --fixed-value::
 	When used with the `value-pattern` argument, treat `value-pattern` as
 	an exact string instead of a regular expression. This will restrict
@@ -333,6 +333,9 @@ recommended to migrate to the new syntax.
 --rename-section <old-name> <new-name>::
 	Replaced by `git config rename-section <old-name> <new-name>`.
 
+--remove-section <name>::
+	Replaced by `git config remove-section <name>`.
+
 CONFIGURATION
 -------------
 `pager.config` is only respected when listing configuration, i.e., when

builtin/config.c

@@ -21,6 +21,7 @@ static const char *const builtin_config_usage[] = {
 	N_("git config set [<file-option>] [--type=<type>] [--all] [--value=<value>] [--fixed-value] <name> <value>"),
 	N_("git config unset [<file-option>] [--all] [--value=<value>] [--fixed-value] <name> <value>"),
 	N_("git config rename-section [<file-option>] <old-name> <new-name>"),
+	N_("git config remove-section [<file-option>] <name>"),
 	NULL
 };
 
@@ -49,6 +50,11 @@ static const char *const builtin_config_rename_section_usage[] = {
 	NULL
 };
 
+static const char *const builtin_config_remove_section_usage[] = {
+	N_("git config remove-section [<file-option>] <name>"),
+	NULL
+};
+
 static char *key;
 static regex_t *key_regexp;
 static const char *value_pattern;
@@ -980,12 +986,38 @@ static int cmd_config_rename_section(int argc, const char **argv, const char *pr
 	return 0;
 }
 
+static int cmd_config_remove_section(int argc, const char **argv, const char *prefix)
+{
+	struct option opts[] = {
+		CONFIG_LOCATION_OPTIONS,
+		OPT_END(),
+	};
+	int ret;
+
+	argc = parse_options(argc, argv, prefix, opts, builtin_config_remove_section_usage,
+			     PARSE_OPT_STOP_AT_NON_OPTION);
+	check_write();
+	check_argc(argc, 1, 1);
+
+	handle_config_location(prefix);
+
+	ret = git_config_rename_section_in_file(given_config_source.file,
+						argv[0], NULL);
+	if (ret < 0)
+		return ret;
+	else if (!ret)
+		die(_("no such section: %s"), argv[0]);
+
+	return 0;
+}
+
 static struct option builtin_subcommand_options[] = {
 	OPT_SUBCOMMAND("list", &subcommand, cmd_config_list),
 	OPT_SUBCOMMAND("get", &subcommand, cmd_config_get),
 	OPT_SUBCOMMAND("set", &subcommand, cmd_config_set),
 	OPT_SUBCOMMAND("unset", &subcommand, cmd_config_unset),
 	OPT_SUBCOMMAND("rename-section", &subcommand, cmd_config_rename_section),
+	OPT_SUBCOMMAND("remove-section", &subcommand, cmd_config_remove_section),
 	OPT_END(),
 };
 

t/t1300-config.sh

@@ -813,7 +813,7 @@ cat >> .git/config << EOF
 EOF
 
 test_expect_success 'remove section' '
-	git config --remove-section branch.zwei
+	git config ${mode_prefix}remove-section branch.zwei
 '
 
 cat > expect << EOF
@@ -2602,7 +2602,7 @@ test_expect_success 'refuse --fixed-value for incompatible actions' '
 	test_must_fail git config --file=config --fixed-value --get-urlmatch dev.null bogus &&
 	test_must_fail git config --file=config --fixed-value --get-urlmatch dev.null bogus &&
 	test_must_fail git config ${mode_prefix}rename-section --file=config --fixed-value dev null &&
-	test_must_fail git config --file=config --fixed-value --remove-section dev &&
+	test_must_fail git config ${mode_prefix}remove-section --file=config --fixed-value dev &&
 	test_must_fail git config ${mode_prefix}list --file=config --fixed-value &&
 	test_must_fail git config --file=config --fixed-value --get-color dev.null &&
 	test_must_fail git config --file=config --fixed-value --get-colorbool dev.null &&