plugins: Eliminate unnecessary run_npm.js

I had anticipated more shared logic than we actually need (the
abstraction in `run_npm.js` is YAGNI).

src/node/utils/run_npm.js

@@ -1,39 +0,0 @@
-'use strict';
-
-const log4js = require('log4js');
-const runCmd = require('./run_cmd');
-
-const logger = log4js.getLogger('runNpm');
-
-/**
- * Wrapper around `runCmd()` to make it easier to run npm.
- *
- * @param args Command-line arguments to pass to npm.
- * @param opts See the documentation for `runCmd()`.
- *
- * @returns A Promise with additional `stdout`, `stderr`, and `child` properties. See the
- *     documentation for `runCmd()`.
- */
-module.exports = exports = (args, opts = {}) => {
-  const cmd = ['npm', ...args];
-  // MUST return the original Promise returned from runCmd so that the caller can access stdout.
-  return runCmd(cmd, opts);
-};
-
-// Log the version of npm at startup.
-let loggedVersion = false;
-(async () => {
-  if (loggedVersion) return;
-  loggedVersion = true;
-  const p = runCmd(['npm', '--version'], {stdoutLogger: null});
-  const chunks = [];
-  await Promise.all([
-    (async () => { for await (const chunk of p.stdout) chunks.push(chunk); })(),
-    p, // Await in parallel to avoid unhandled rejection if p rejects during chunk read.
-  ]);
-  const version = Buffer.concat(chunks).toString().replace(/\n+$/g, '');
-  logger.info(`npm --version: ${version}`);
-})().catch((err) => {
-  logger.error(`Failed to get npm version: ${err.stack}`);
-  // This isn't a fatal error so don't re-throw.
-});

src/static/js/pluginfw/plugins.js

@@ -4,13 +4,31 @@ const fs = require('fs').promises;
 const hooks = require('./hooks');
 const log4js = require('log4js');
 const path = require('path');
-const runNpm = require('../../../node/utils/run_npm');
+const runCmd = require('../../../node/utils/run_cmd');
 const tsort = require('./tsort');
 const pluginUtils = require('./shared');
 const defs = require('./plugin_defs');
 
 const logger = log4js.getLogger('plugins');
 
+// Log the version of npm at startup.
+let loggedVersion = false;
+(async () => {
+  if (loggedVersion) return;
+  loggedVersion = true;
+  const p = runCmd(['npm', '--version'], {stdoutLogger: null});
+  const chunks = [];
+  await Promise.all([
+    (async () => { for await (const chunk of p.stdout) chunks.push(chunk); })(),
+    p, // Await in parallel to avoid unhandled rejection if p rejects during chunk read.
+  ]);
+  const version = Buffer.concat(chunks).toString().replace(/\n+$/g, '');
+  logger.info(`npm --version: ${version}`);
+})().catch((err) => {
+  logger.error(`Failed to get npm version: ${err.stack || err}`);
+  // This isn't a fatal error so don't re-throw.
+});
+
 exports.prefix = 'ep_';
 
 exports.formatPlugins = () => Object.keys(defs.plugins).join(', ');
@@ -78,13 +96,13 @@ exports.getPackages = async () => {
   //   * The `--no-production` flag is required (or the `NODE_ENV` environment variable must be
   //     unset or set to `development`) because otherwise `npm ls` will not mention any packages
   //     that are not included in `package.json` (which is expected to not exist).
-  const np = runNpm(['ls', '--long', '--json', '--depth=0', '--no-production'], {
+  const p = runCmd(['npm', 'ls', '--long', '--json', '--depth=0', '--no-production'], {
     stdoutLogger: null, // We want to capture stdout, so don't attempt to log it.
   });
   const chunks = [];
   await Promise.all([
-    (async () => { for await (const chunk of np.stdout) chunks.push(chunk); })(),
+    (async () => { for await (const chunk of p.stdout) chunks.push(chunk); })(),
-    np, // Await in parallel to avoid unhandled rejection if np rejects during chunk read.
+    p, // Await in parallel to avoid unhandled rejection if p rejects during chunk read.
   ]);
   const {dependencies = {}} = JSON.parse(Buffer.concat(chunks).toString());
   await Promise.all(Object.entries(dependencies).map(async ([pkg, info]) => {