cli.js

#!/usr/bin/env node
'use strict'

const fs = require('fs')
const _ = require('lodash')
const meow = require('meow')
const chalk = require('chalk')
const mkdirp = require('mkdirp')
const dedent = require('dedent')
const isBlank = require('is-blank')
const isPresnet = require('is-present')
const fileExists = require('file-exists')
const cssstats = require('cssstats')
const trailingLines = require('single-trailing-newline')
const authorsToMd = require('authors-to-markdown')

const tachyonsBuildCss = require('tachyons-build-css')

const cli = meow(`
  Usage
    $ tachyons <input.css>

  Options
    -m, --minify Minify the output stylesheet
    -r, --repeat Repeat class names to increase specificity
    -a, --authors Dynamically add authors based on package.json
    -n, --new Generate a new Tachyons project
    --rtl Generate rtl supported css
    --generate-docs Generate documentation for a given module
    --package The path to the module package to be documented
    --preserve-variables Preserve CSS variables in output

  Example
    $ tachyons src/tachyons.css > dist/c.css
    $ tachyons src/tachyons.css > dist/c.css --minify
    $ tachyons src/tachyons.css > dist/c.repeated.css --repeat
    $ tachyons src/tachyons-type-scale.css --generate-docs --package=./package.json > readme.md
    $ tachyons --new=my-new-project
`, {
  alias: {
    m: 'minify',
    r: 'repeat',
    a: 'authors',
    n: 'new'
  }
})

const inputFile = cli.input[0]
const outputFile = cli.input[1]

if (cli.flags.new) {
  console.log('Generating a new Tachyons project')
  const projDir = cli.flags.new == true ? 'tachyons-project' : cli.flags.new

  mkdirp.sync(projDir)
  mkdirp.sync(projDir + '/src')
  mkdirp.sync(projDir + '/css')

  const index = fs.readFileSync(__dirname + '/templates/new/index.html', 'utf8')
  const pkg = fs.readFileSync(__dirname + '/templates/new/package.json', 'utf8')
  const readme = fs.readFileSync(__dirname + '/templates/new/readme.md', 'utf8')
  const style = fs.readFileSync(__dirname + '/templates/new/src/styles.css', 'utf8')

  fs.writeFileSync(projDir + '/index.html', index)
  fs.writeFileSync(projDir + '/package.json', pkg)
  fs.writeFileSync(projDir + '/readme.md', readme)
  fs.writeFileSync(projDir + '/src/styles.css', style)

  console.log('New project located in ' + projDir)
  process.exit(0)
}

if (isBlank(inputFile)) {
  console.error(chalk.red('Please provide an input stylesheet'))
  console.log(cli.help)
  process.exit(1)
} else if (!fileExists(inputFile)) {
  console.error(chalk.red('File does not exist ' + inputFile))
  console.log(cli.help)
  process.exit(1)
}

const input = fs.readFileSync(inputFile, 'utf8')
tachyonsBuildCss(input, {
  from: inputFile,
  to: outputFile,
  rtl: cli.flags.rtl,
  minify: cli.flags.minify,
  repeat: cli.flags.repeat,
  preserveVariables: cli.flags.preserveVariables
}).then(function (result) {
  if (cli.flags.generateDocs) {
    const stats = cssstats(result.css)
    const pkg = require(cli.flags.package)
    const template = fs.readFileSync(__dirname + '/templates/readme.md', 'utf8')
    const tpl = _.template(template)

    let authors = `* [mrmrs](http://mrmrs.io)
* [johno](http://johnotander.com)
`

    if (cli.flags.authors) {
      authors = authorsToMd(pkg)
    }

    const srcMd = /^\/\*!!![\s\S]*?\*\/.*/.exec(input)

    const defaultMd = `
      # ${pkg.name} ${pkg.version}

      ${pkg.description}
    `

    const md = tpl({
      stats,
      authors,
      module: pkg,
      srcMd: dedent(srcMd && srcMd[0] || defaultMd).replace(/^\/\*!!!/, '').replace(/\*\/$/, ''),
      srcCss: trailingLines(result.css)
    })

    console.log(trailingLines(md))
    process.exit(0)
  } else {
    console.log(trailingLines(result.css))
    process.exit(0)
  }
})