Simple CLI to switch between npmrc configs

readme.md

Setup

1. Download script

curl https://gist.githubusercontent.com/chrisdothtml/509fdbe3bfec1a11bbc346e4b44c3604/raw/switch-npmrc.js > "$HOME/switch-npmrc.js"

2. Add alias to .bash_profile or similar

alias npmrc="node $HOME/switch-npmrc.js"

3. Setup your .npmrc sections

###
# Formatting info:
# https://gist.github.com/chrisdothtml/509fdbe3bfec1a11bbc346e4b44c3604#file-readme-md
###

# $personal:
//registry.npmjs.org/:_authToken=[...]
email[email protected]

# $work:
#//registry.npmjs.org/:_authToken=[...]
#[email protected]

Use

# list available sections
npmrc ls

# enable a section (comments-out all other sections, uncomments provided section)
npmrc work

switch-npmrc.js

/*
 * Installed from:
 * https://gist.github.com/chrisdothtml/509fdbe3bfec1a11bbc346e4b44c3604
 */
const fs = require('fs')
const path = require('path')
// update this if yours is different (assumes this script is in the same dir as your .npmrc)
const NPMRC_PATH = path.join(__dirname, '.npmrc')

// format:
// # $sectionName:
function parseSectionName (line) {
  const match = /^# \$([^:]+):/.exec(line)

  if (match) {
    return match[1]
  }
}

function main () {
  const lines = fs.readFileSync(NPMRC_PATH, 'utf-8').split('\n')
  const argv = process.argv.slice(2)

  if (argv[0] === 'ls') {
    const sections = []

    for (const line of lines) {
      const sectionName = parseSectionName(line)

      if (sectionName) {
        sections.push(sectionName)
      }
    }

    console.log(`Section names:\n\n${sections.sort().join('\n')}`)
  } else {
    const sectionToEnable = argv[0]
    let currentSection
    const newContent = lines
      .map((line, index, lines) => {
        if (line) {
          const sectionName = parseSectionName(line)

          if (sectionName) {
            currentSection = sectionName
          } else if (currentSection) {
            if (currentSection === sectionToEnable) {
              line = line.replace(/^#/, '')
            } else {
              line = line.startsWith('#') ? line : '#' + line
            }
          }
        }

        return line
      })
      .join('\n')

    fs.writeFileSync(NPMRC_PATH, newContent)
  }
}

main()