cli.js

#!/usr/bin/env node

// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.

var fs = require('fs')
var util = require('util')
var Fiber = require('fibers')
var optimist = require('optimist')
var child_process = require('child_process')

var couchjs = require('./couchjs')
var package_json = require('./package.json')
var LineStream = require('./stream')
var inspector = require('./inspector')
var log = require('./console').log


var opts = optimist.boolean(['h', 'V', 'H'])
                   .describe({ 'h': 'display a short help message and exit'
                             , 'V': 'display version information and exit'
                             , 'H': 'enable couchjs cURL bindings (not implemented)'
                             })
                   .usage('$0 <path to main.js>')


function main() {
  var main_js = opts.argv._[0]
  if(!main_js)
    return console.error(opts.help())

  log('couchjs/%s %s: %s', package_json.version, process.pid, main_js)
  if(process.env.COUCHJS_DEBUG_PORT)
    inspector(+process.env.COUCHJS_DEBUG_PORT)

  fs.readFile(main_js, 'utf8', function(er, body) {
    if(er)
      throw er

    var stdin = new LineStream.v2
    stdin.on('readable', function() {
      var buf = stdin.read()
      if(buf)
        couchjs.stdin(buf)
    })
    stdin.on('end', function() {
      log('Terminate; connection to parent closed')
      process.exit(0)
    })

    process.stdin.setEncoding('utf8')
    process.stdin.pipe(stdin)

    var main_func = Function(['print', 'readline', 'evalcx', 'gc', 'quit'], body)

    log('Call main')
    Fiber(function() { main_func(couchjs.print, couchjs.readline, couchjs.evalcx, couchjs.gc) }).run()
  })

  process.on('uncaughtException', function(er) {
    log('Error:\n%s', er.stack)
  })
}

if(require.main === module)
  main()