Add support for non-standard rule 'ignore'.

docs/to-do.md

@@ -2,8 +2,6 @@
 
 * Add a fixer for the 'indent_style' rule.
 
-* Add a non-standard rule to ignore directories.
-
 * Optimize speed and memory usage.
 
 * Document how to install.

editorconfig/apply.go

@@ -26,6 +26,10 @@ func GetRulesToApplyToSourcePath(sourcePath string, cfs []ConfigFile) map[string
 		}
 	}
 
+	if isIgnored, _ := rules["ignore"]; isIgnored == "true" {
+		return make(map[string]string)
+	}
+
 	delete(rules, "root")
 
 	if indentStyleValue, _ := rules["indent_style"]; indentStyleValue == "tab" {

editorconfig/apply_test.go

@@ -32,3 +32,16 @@ func TestGetRulesToApplyToSourcePathWhenNoRulesShouldApply(t *testing.T) {
 		t.Error("No rules should be applied for the file")
 	}
 }
+
+func TestGetRulesToApplyToSourcePathWhenPathShouldBeIgnored(t *testing.T) {
+	result := GetRulesToApplyToSourcePath(
+		"some-file-to-ignore.ignored",
+		[]ConfigFile{
+			CreateConfigFileStruct("tests/.editorconfig"),
+		},
+	)
+
+	if len(result) != 0 {
+		t.Error("No rules should be applied for the file")
+	}
+}

editorconfig/tests/.editorconfig

@@ -13,3 +13,6 @@ trim_trailing_whitespace = false
 
 [**.go]
 indent_style = tabs
+
+[**.ignored]
+ignore = true