var common = require('./common');
var fs = require('fs');
var path = require('path');

common.register('to', _to, {
  pipeOnly: true,
  wrapOutput: false,
});

//@
//@ ### ShellString.prototype.to(file)
//@
//@ Examples:
//@
//@ ```javascript
//@ cat('input.txt').to('output.txt');
//@ ```
//@
//@ Analogous to the redirection operator `>` in Unix, but works with
//@ ShellStrings (such as those returned by `cat`, `grep`, etc). _Like Unix
//@ redirections, `to()` will overwrite any existing file!_
function _to(options, file) {
  if (!file) common.error('wrong arguments');

  if (!fs.existsSync(path.dirname(file))) {
    common.error('no such file or directory: ' + path.dirname(file));
  }

  try {
    fs.writeFileSync(file, this.stdout || this.toString(), 'utf8');
    return this;
  } catch (e) {
    /* istanbul ignore next */
    common.error('could not write to file (code ' + e.code + '): ' + file, { continue: true });
  }
}
module.exports = _to;
