separate getLocalNpmBinPath for install-apm.js

Author: steven nguyen

script/config.js

@@ -54,6 +54,7 @@ module.exports = {
   homeDirPath,
   getApmBinPath,
   getNpmBinPath,
+  getLocalNpmBinPath,
   snapshotAuxiliaryData: {}
 };
 
@@ -114,3 +115,15 @@ function getApmBinPath() {
 function getNpmBinPath() {
   return process.platform === 'win32' ? 'npm.cmd' : 'npm';
 }
+
+function getLocalNpmBinPath() {
+  const npmBinName = process.platform === 'win32' ? 'npm.cmd' : 'npm';
+  const localNpmBinPath = path.resolve(
+    repositoryRootPath,
+    'script',
+    'node_modules',
+    '.bin',
+    npmBinName
+  );
+  return localNpmBinPath;
+}

script/lib/install-apm.js

@@ -12,7 +12,7 @@ module.exports = function(ci) {
   }
   console.log('Installing apm');
   childProcess.execFileSync(
-    CONFIG.getNpmBinPath(),
+    CONFIG.getLocalNpmBinPath(),
     ['--global-style', '--loglevel=error', ci ? 'ci' : 'install'],
     { env: process.env, cwd: CONFIG.apmRootPath }
   );