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참고/playwright-main/packages/isomorphic/yaml.ts

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+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export function yamlEscapeKeyIfNeeded(str: string): string {
+  if (!yamlStringNeedsQuotes(str))
+    return str;
+  return `'` + str.replace(/'/g, `''`) + `'`;
+}
+
+export function yamlEscapeValueIfNeeded(str: string): string {
+  if (!yamlStringNeedsQuotes(str))
+    return str;
+  return '"' + str.replace(/[\\"\x00-\x1f\x7f-\x9f]/g, c => {
+    switch (c) {
+      case '\\':
+        return '\\\\';
+      case '"':
+        return '\\"';
+      case '\b':
+        return '\\b';
+      case '\f':
+        return '\\f';
+      case '\n':
+        return '\\n';
+      case '\r':
+        return '\\r';
+      case '\t':
+        return '\\t';
+      default:
+        const code = c.charCodeAt(0);
+        return '\\x' + code.toString(16).padStart(2, '0');
+    }
+  }) + '"';
+}
+
+function yamlStringNeedsQuotes(str: string): boolean {
+  if (str.length === 0)
+    return true;
+
+  // Strings with leading or trailing whitespace need quotes
+  if (/^\s|\s$/.test(str))
+    return true;
+
+  // Strings containing control characters need quotes
+  if (/[\x00-\x08\x0b\x0c\x0e-\x1f\x7f-\x9f]/.test(str))
+    return true;
+
+  // Strings starting with '-' need quotes
+  if (/^-/.test(str))
+    return true;
+
+  // Strings containing ':' or '\n' followed by a space or at the end need quotes
+  if (/[\n:](\s|$)/.test(str))
+    return true;
+
+  // Strings containing '#' preceded by a space need quotes (comment indicator)
+  if (/\s#/.test(str))
+    return true;
+
+  // Strings that contain line breaks need quotes
+  if (/[\n\r]/.test(str))
+    return true;
+
+  // Strings starting with indicator characters or quotes need quotes
+  if (/^[&*\],?!>|@"'#%]/.test(str))
+    return true;
+
+  // Strings containing special characters that could cause ambiguity
+  if (/[{}`]/.test(str))
+    return true;
+
+  // YAML array starts with [
+  if (/^\[/.test(str))
+    return true;
+
+  // Non-string types recognized by YAML
+  if (!isNaN(Number(str)) || ['y', 'n', 'yes', 'no', 'true', 'false', 'on', 'off', 'null'].includes(str.toLowerCase()))
+    return true;
+
+  return false;
+}