Remove json-bigint dependency

lib/utils.js

@@ -298,6 +298,80 @@ function compareVersions(version1, version2, operator) {
   }
 }
 
+// Feature detection for JSON.parse context parameter support
+// Test once at module load time to avoid repeated checks
+let isContextSupported = false;
+try {
+  // Try to use context parameter with a simple test
+  JSON.parse('{"test":1}', (key, value, context) => {
+    if (context && context.source !== undefined) {
+      isContextSupported = true;
+    }
+    return value;
+  });
+} catch {
+  // Context parameter not supported, will use regex fallback
+  isContextSupported = false;
+}
+
+/**
+ * Parse JSON string with support for large integers (beyond Number.MAX_SAFE_INTEGER).
+ * Large integers are automatically converted to strings to preserve precision.
+ *
+ * Uses feature detection to determine the best parsing strategy:
+ * - If context parameter is supported (Node.js >= 21.0.0, modern runtimes):
+ *   Uses native JSON.parse() with context parameter for optimal performance
+ * - Otherwise (older environments):
+ *   Preprocesses JSON string with regex to convert unsafe integers before parsing
+ *
+ * @param {string} str - JSON string to parse
+ * @returns {any} Parsed JSON object with unsafe integers as strings
+ *
+ * @example
+ * parseJSONWithBigInt('{"value": 9007199254740992}')
+ * // Returns: { value: '9007199254740992' }
+ *
+ * parseJSONWithBigInt('{"value": 100}')
+ * // Returns: { value: 100 }
+ */
+function parseJSONWithBigInt(str) {
+  // For environments supporting context parameter, use it
+  // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse
+  if (isContextSupported) {
+    return JSON.parse(str, (key, value, context) => {
+      if (
+        Number.isInteger(value) &&
+        !Number.isSafeInteger(Number(context.source))
+      ) {
+        return context.source;
+      }
+      return value;
+    });
+  }
+
+  // For environments without context parameter support, preprocess the JSON string
+  // to convert large integers (outside the safe integer range) to strings before parsing.
+  //
+  // The regex matches integers that are actual JSON values, not inside strings.
+  // It matches after: colon (:), comma (,), or open bracket ([)
+  // and before: comma (,), close brace (}), or close bracket (])
+  const processed = str.replace(
+    /(?:[:,[])\s*(-?\d+)(?=\s*[,}\]])/g,
+    (match, number) => {
+      const num = Number(number);
+      // If the number is not safe, convert it to a string
+      if (!Number.isSafeInteger(num)) {
+        // Preserve the prefix character (: or , or [)
+        const prefix = match.charAt(0);
+        return `${prefix} "${number}"`;
+      }
+      return match;
+    }
+  );
+
+  return JSON.parse(processed);
+}
+
 module.exports = {
   // General utilities
   detectUbuntuCodename,
@@ -320,5 +394,7 @@ module.exports = {
   removeSync,
   readJsonSync,
 
+  // Version and JSON utilities
   compareVersions,
+  parseJSONWithBigInt,
 };

package.json

@@ -77,7 +77,6 @@
     "@rclnodejs/ref-struct-di": "^1.1.1",
     "bindings": "^1.5.0",
     "debug": "^4.4.0",
-    "json-bigint": "^1.0.0",
     "node-addon-api": "^8.3.1",
     "walk": "^2.3.15"
   },

rosidl_parser/rosidl_parser.js

@@ -14,20 +14,12 @@
 
 'use strict';
 
-const { compareVersions } = require('../lib/utils.js');
+const { compareVersions, parseJSONWithBigInt } = require('../lib/utils');
 const path = require('path');
 const execFile = require('child_process').execFile;
 
 const pythonExecutable = require('./py_utils').getPythonExecutable('python3');
 
-const contextSupportedVersion = '21.0.0.0';
-const currentVersion = process.version;
-const isContextSupported = compareVersions(
-  currentVersion.substring(1, currentVersion.length),
-  contextSupportedVersion,
-  '>='
-);
-
 const rosidlParser = {
   parseMessageFile(packageName, filePath) {
     return this._parseFile('parse_message_file', packageName, filePath);
@@ -41,25 +33,6 @@ const rosidlParser = {
     return this._parseFile('parse_action_file', packageName, filePath);
   },
 
-  _parseJSONObject(str) {
-    // For nodejs >= `contextSupportedVersion`, we leverage context parameter to
-    // convert unsafe integer to string, otherwise, json-bigint is used.
-    // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse
-    if (isContextSupported) {
-      return JSON.parse(str, (key, value, context) => {
-        if (
-          Number.isInteger(value) &&
-          !Number.isSafeInteger(Number(context.source))
-        ) {
-          return context.source;
-        }
-        return value;
-      });
-    }
-    const JSONbigString = require('json-bigint')({ storeAsString: true });
-    return JSONbigString.parse(str);
-  },
-
   _parseFile(command, packageName, filePath) {
     return new Promise((resolve, reject) => {
       const args = [
@@ -82,7 +55,7 @@ const rosidlParser = {
               )
             );
           } else {
-            resolve(this._parseJSONObject(stdout));
+            resolve(parseJSONWithBigInt(stdout));
           }
         }
       );