[PATCH v2 2/2] clean: new option --exclude-from

@@ -8,7 +8,7 @@ git-clean - Remove untracked files from the working tree
 SYNOPSIS
 --------
 [verse]
-'git clean' [-d] [-f] [-i] [-n] [-q] [-e <pattern>] [-x | -X] [--] <path>...
+'git clean' [-d] [-f] [-i] [-n] [-q] [-e <pattern>] [--exclude-from=<file>] [-x | -X] [--] <path>...
 
 DESCRIPTION
 -----------

@@ -61,6 +61,9 @@ OPTIONS
 	$GIT_DIR/info/exclude, also consider these patterns to be in the
 	set of the ignore rules in effect.
 
+--exclude-from=<file>::
+	Read exclude patterns from <file>; 1 per line.
+
 -x::
 	Don't use the standard ignore rules read from .gitignore (per
 	directory) and $GIT_DIR/info/exclude, but do still use the ignore

@@ -22,7 +22,7 @@ static struct string_list del_list = STRING_LIST_INIT_DUP;
 static unsigned int colopts;
 
 static const char *const builtin_clean_usage[] = {
-	N_("git clean [-d] [-f] [-i] [-n] [-q] [-e <pattern>] [-x | -X] [--] <paths>..."),
+	N_("git clean [-d] [-f] [-i] [-n] [-q] [-e <pattern>] [--exclude-from=<file>] [-x | -X] [--] <paths>..."),
 	NULL
 };
 

@@ -875,6 +875,14 @@ static void interactive_main_loop(void)
 	}
 }
 
+static int exclude_from_cb(const struct option *opt,
+				     const char *arg, int unset)
+{
+	struct dir_struct *dir = opt->value;
+	add_excludes_from_file(dir, arg);
+	return 0;
+}
+
 int cmd_clean(int argc, const char **argv, const char *prefix)
 {
 	int i, res;

@@ -898,12 +906,16 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 				N_("remove whole directories")),
 		{ OPTION_CALLBACK, 'e', "exclude", &exclude_list, N_("pattern"),
 		  N_("add <pattern> to ignore rules"), PARSE_OPT_NONEG, exclude_cb },
+		{ OPTION_CALLBACK, 0, "exclude-from", &dir, N_("file"),
+			N_("read exclude patterns from <file>"),
+			0, exclude_from_cb },
 		OPT_BOOL('x', NULL, &ignored, N_("remove ignored files, too")),
 		OPT_BOOL('X', NULL, &ignored_only,
 				N_("remove only ignored files")),
 		OPT_END()
 	};
 
+	memset(&dir, 0, sizeof(dir));
 	git_config(git_clean_config, NULL);
 	if (force < 0)
 		force = 0;

@@ -913,7 +925,6 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 	argc = parse_options(argc, argv, prefix, options, builtin_clean_usage,
 			     0);
 
-	memset(&dir, 0, sizeof(dir));
 	if (ignored_only)
 		dir.flags |= DIR_SHOW_IGNORED;
 

@@ -628,6 +628,66 @@ test_expect_success 'git clean -e' '
 	test_path_is_file known
 '
 
+test_expect_success 'git clean --exclude-from' '
+	rm -fr repo &&
+	mkdir repo &&
+	cd repo &&
+	git init &&
+	touch known 1 2 3 &&
+	git add known &&
+	cat >.git/clean-exclude <<-\EOF &&
+	1
+	2
+	EOF
+	git clean -f --exclude-from=.git/clean-exclude &&
+	test_path_is_file 1 &&
+	test_path_is_file 2 &&
+	test_path_is_missing 3 &&
+	test_path_is_file known
+'
+
+test_expect_success 'git clean -e --exclude-from' '
+	rm -fr repo &&
+	mkdir repo &&
+	cd repo &&
+	git init &&
+	touch known 1 2 3 &&
+	git add known &&
+	echo 1 >> .git/clean-exclude &&
+	git clean -f -e 2 --exclude-from=.git/clean-exclude &&
+	test_path_is_file 1 &&
+	test_path_is_file 2 &&
+	test_path_is_missing 3 &&
+	test_path_is_file known
+'
+
+test_expect_success 'git clean --exclude-from --exclude-from' '
+	rm -fr repo &&
+	mkdir repo &&
+	git init &&
+	touch known 1 2 3 &&
+	git add known &&
+	cat >.git/clean-exclude1 <<-\EOF &&
+	1
+	EOF
+	cat >.git/clean-exclude2 <<-\EOF &&
+	2
+	EOF
+	git clean -f --exclude-from=.git/clean-exclude1 --exclude-from=.git/clean-exclude2 &&
+	test_path_is_file 1 &&
+	test_path_is_file 2 &&
+	test_path_is_missing 3 &&
+	test_path_is_file known
+'
+
+test_expect_success 'git clean --exclude-from=BADFILE' '
+	rm -fr repo &&
+	mkdir repo &&
+	cd repo &&
+	git init &&
+	test_expect_code 128 git clean -f --exclude-from=.git/clean-exclude-not-there
+'
+
 test_expect_success SANITY 'git clean -d with an unreadable empty directory' '
 	mkdir foo &&
 	chmod a= foo &&