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prettier Show spawn.js Source code

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  1. /* @flow */
  2.  
  3. var child_process = require('child_process');
  4.  
  5. var ls = child_process.spawn('ls');
  6. var wc = child_process.spawn('wc', ['-l']);
  7.  
  8. // args + options.
  9. child_process.spawn('echo', ['-n', '"Testing..."'], {env: {TEST: 'foo'}});
  10.  
  11. // options only.
  12. child_process.spawn('echo', {env: {FOO: 2}});
  13.  
  14. ls.stdout.on('data', function(data) {
  15.   wc.stdin.write(data);
  16. });
  17.  
  18. ls.stderr.on('data', function(data) {
  19.   console.warn(data);
  20. });
  21.  
  22. ls.on('close', function(code) {
  23.   if (code !== 0) {
  24.     console.warn('`ls` exited with code %s', code);
  25.   }
  26.   wc.stdin.end();
  27. });
  28.  
  29. wc.stdout.pipe(process.stdout);
  30. wc.stderr.pipe(process.stderr);
  31.  
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