Use signal-exit

Author: jdalton

bin/cli.js

@@ -2,4 +2,42 @@
 'use strict'
 
 const constants = require('../dist/constants')
-require(`../dist/${constants.DIST_TYPE}/cli.js`)
+
+const { DIST_TYPE, execPath } = constants
+
+if (DIST_TYPE === 'require') {
+  require(`../dist/require/cli.js`)
+} else {
+  const path = require('node:path')
+  const spawn = require('@npmcli/promise-spawn')
+  const { onExit } = require('signal-exit')
+
+  const abortController = new AbortController()
+  const { signal: abortSignal } = abortController
+
+  // Detect ^C, i.e. Ctrl + C.
+  onExit(() => {
+    abortController.abort()
+  })
+
+  const spawnPromise = spawn(
+    execPath,
+    [
+      // Lazily access constants.nodeNoWarningsFlags.
+      ...constants.nodeNoWarningsFlags,
+      path.join(constants.rootDistPath, DIST_TYPE, 'cli.js'),
+      ...process.argv.slice(2)
+    ],
+    {
+      stdio: 'inherit',
+      signal: abortSignal
+    }
+  )
+  spawnPromise.process.on('exit', (code, signal) => {
+    if (signal) {
+      process.kill(process.pid, signal)
+    } else if (code !== null) {
+      process.exit(code)
+    }
+  })
+}

src/shadow/arborist.ts

@@ -10,6 +10,7 @@ import yoctoSpinner from '@socketregistry/yocto-spinner'
 import isInteractive from 'is-interactive'
 import npa from 'npm-package-arg'
 import semver from 'semver'
+import { onExit } from 'signal-exit'
 
 import config from '@socketsecurity/config'
 import { isObject } from '@socketsecurity/registry/lib/objects'
@@ -259,6 +260,8 @@ if (npmRootPath === undefined) {
   console.error(
     `Unable to find npm CLI install directory.\nSearched parent directories of ${npmEntrypoint}.\n\n${POTENTIAL_BUG_ERROR_MESSAGE}`
   )
+  // The exit code 127 indicates that the command or binary being executed
+  // could not be found.
   process.exit(127)
 }
 
@@ -288,6 +291,8 @@ if (log === undefined) {
   console.error(
     `Unable to integrate with npm CLI logging infrastructure.\n\n${POTENTIAL_BUG_ERROR_MESSAGE}.`
   )
+  // The exit code 127 indicates that the command or binary being executed
+  // could not be found.
   process.exit(127)
 }
 
@@ -298,6 +303,11 @@ const translations = require(path.join(rootPath, 'translations.json'))
 const abortController = new AbortController()
 const { signal: abortSignal } = abortController
 
+// Detect ^C, i.e. Ctrl + C.
+onExit(() => {
+  abortController.abort()
+})
+
 const Arborist: ArboristClass = require(arboristClassPath)
 const depValid: (
   child: NodeClass,

src/shadow/shadow-bin.ts

@@ -27,6 +27,8 @@ export default async function shadow(binName: 'npm' | 'npx') {
     const npmEntrypoint = realpathSync(binPath)
     const npmRootPath = findRoot(path.dirname(npmEntrypoint))
     if (npmRootPath === undefined) {
+      // The exit code 127 indicates that the command or binary being executed
+      // could not be found.
       process.exit(127)
     }
     const npmDepPath = path.join(npmRootPath, 'node_modules')