textile

#!/usr/bin/env node

var fs = require( 'fs' );

var textile;
var nodeVersion = process && process.versions && process.versions.node;
// is this node version mostly ES6 complete
if ( parseInt( nodeVersion || 0, 10 ) > 5 ) {
  // serve code from src dir
  textile = require( '../src' );
}
else {
  // serve transpiled code
  textile = require( '../dist/textile' );
}

// clean arguments
var args = [];
process.argv.slice( 2 ).forEach( function ( m, i, s ) {
  if ( ( s = /^([^=]+)=(.*)$/.exec( m ) ) ) {
    args.push( s[1], s[2] );
  }
  else {
    args.push( m );
  }
});

// parse arguments
var options = {};
while ( args.length ) {
  var arg = args.shift();
  if ( arg === '-t' || arg === '--tokens' ) {
    options.tokens = true;
  }
  else if ( arg === '-i' || arg === '--input' ) {
    options.input = args.shift();
  }
  else if ( arg === '-o' || arg === '--output' ) {
    options.output = args.shift();
  }
  else {
    if ( !options.files ) { options.files = []; }
    options.files.shift( arg );
  }
}

// input overrides file arguments
if ( options.input ) {
  options.files = [ options.input ];
}

// writer
var data = '';
function writeData () {
  data = options.tokens ? JSON.stringify( textile.jsonml( data ), null, 2 )
                        : textile( data );
  if ( options.output ) {
    fs.writeFileSync( options.output, data );
  }
  else {
    process.stdout.write( data + '\n' );
  }
}

// file or stdin?
if ( options.files ) {
  data = fs.readFileSync( options.files[0], 'utf8' );
  writeData();
}
else {
  const stdin = process.stdin;
  stdin.setEncoding( 'utf8' );
  stdin.on( 'data', function ( text ) {
    data += text;
  });
  stdin.on( 'end', writeData );
  stdin.resume();
}