npx_verdaccio

#!/usr/bin/env node
// Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

// This is done in a node script for 2 reasons
// 1. Potability: I will need to run this in windows
// 2. Errors. If the main command fails, the script needs to clean up
// but and exit with this error.
// this _can_ be done from bash or shell,
// but now the portability problems loom large.

const { spawn } = require('child_process')
const pipeStdIo = { stdio: [process.stdin, process.stdout, process.stderr] }

// I am assuming that you used `local_verdaccio_publish`
// But either way,
// this is to facilitate running `npx`
// and interacting with a local verdaccio server
// So... I need a running server
const verdaccio = spawn('npx', ['verdaccio', '-c', 'verdaccio/config.yaml'], pipeStdIo)
  .on('error', e => {
    throw e
  })

const args = [
  '--userconfig', 'verdaccio/npmrc',
  // In npx v6 ignore-existing let you install the latest version
  // regardless of what was installed locally.
  // In npx v7 this is disable and if you need to install anything
  // then --yes is *required*
  '--ignore-existing', '--yes',
  // This is **very** important, (npx ~v6)
  // without this, npx may mask error codes.
  // In testing it was possible to have errors in the npx command
  // but the spawned process here did not exit with a non-zero exit code.
  // See `execCommand` in `libnpx` for specifics
  // In npx v7 this option is deprecated
  '--always-spawn',
  // Yes, this is dangerous.
  // But I'm trying to replicate _just running npx_
  // So if you get here, you should have had access to run npx anyway.
  ...process.argv.slice(2)
]

spawn('npx', args, {
    // npx v7 will *not* install from any repository if any version exists locally.
    cwd: 'verdaccio/integration',
    // This instance of npx needs to target the verdaccio server
    // so the env var that governs this needs to be updated.
    // it is _possible_ for this value to already be set.
    // if the command has been executed from an npm script for example
    env: { ...process.env, npm_config_registry: 'http://localhost:4873/'},
    ...pipeStdIo
  })
  .on('close', (code) => {
    // Kill the background verdaccio server
    verdaccio.kill()

    // If this command had an error,
    // we need to forward this.
    // Otherwise the entire CI build may think that things succeeded.
    if (code !== 0) throw Error(`Exit code: ${code}`)

    process.exit()
  })