firescript/bin/parse.js

Firescript language

const fs = require('fs')
const path = require('path')
const FirescriptParser = require('firescript-parser').FirescriptParser
const esprima = require('esprima')

module.exports = (fireio) => {
  return fireio
    .cmd('parse <file> [output]')
    .description('Parse a .fire or .js file into an AST tree')
    .option('-c, --comments', 'Include comments')
    .option('-l, --location', 'Add location')
    .option('--no-colors', 'Disable cli colors')
    .option('-v, --verbose', 'Verbose log')
    // .option('-r, --range', 'Add range')
    .action((ctx, file, output) => {
      const fsSource = fs.readFileSync(file, { encoding: 'utf8' })
      if (path.extname(file) === '.fire') {
        const parser = new FirescriptParser({
          filename: file
        })

        try {
          const ast = parser.parse(fsSource, {
            type: 'fire',
            includeComments: ctx.comments,
            setLocation: !!ctx.location,
            setRange: !!ctx.range,
            filename: file
          })

          const source = JSON.stringify(ast, null, '  ')

          if (output) {
            fs.writeFileSync(output, source, { encoding: 'utf8' })
          } else {
            console.log(source)
          }
        } catch (err) {
          if (ctx.noColors) {
            err.colorsEnabled = false
          }

          console.log(ctx.verbose ? err.stack : err.toString())
          process.exit(1)
        }
      } else if (path.extname(file) === '.js') {
        const ast = esprima.parseModule(fsSource, {
          loc: !!ctx.location,
          range: !!ctx.range,
          comment: ctx.comments,
          filename: file
        })

        const source = JSON.stringify(ast, null, '  ')

        if (output) {
          fs.writeFileSync(output, source, { encoding: 'utf8' })
        } else {
          console.log(source)
        }
      }
    })
}