dscript_exec 2.0.2

Bash like command piping and redirecting for Dart to make writing Dart scripts easier.

Exec

Bash like command piping and redirecting for Dart to make writing Dart scripts easier.

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From the authors of Jaguar.dart.

Usage

Execute a command

await exec('rm', ['example/dest.csv']).run();

Access command output

final String out = await exec('cat', ['example/names.csv']).runGetOutput();
print(out);

or

await exec('cat', ['example/names.csv']).runGetOutput(onFinish: print);

Pipe

await exec('cat', ['example/names.csv'])
  .pipe(exec('cut', ['-d', "','", '-f', '1']))
  .runGetOutput(onFinish: print);

Output redirection

await (exec('cat', ['example/names.csv']) |
          exec('cut', ['-d', "','", '-f', '1']) >
      new Uri(path: 'example/dest.csv'))
  .run();

Input redirection

await (exec('cut', ['-d', "','", '-f', '1']) <
      '''
John,Smith,34,London
Arthur,Evans,21,Newport
George,Jones,32,Truro
      ''')
  .runGetOutput(onFinish: print);

Inline functions

await exec('cat', ['example/names.csv'])
  .pipeInlineLine(
      (Stream<String> stream) => stream.map((s) => s.split(',')[1]))
  .runGetOutput(onFinish: print);

TODO

• Catch and report error in sub-commands
• Support other encoders
• Support stderr redirection
• Test multiple redirections
• Support &, | and ~ concepts