debug-proc

Show a process output with debug utility.

Installation

npm install debug-proc

Usage

Running node with the appropriate environment vars (DEBUG=proc in this example):

var debugProc = require('debug-proc')('proc');

var proc = spawn('./script.sh', ['abc', 123]);

debugProc(proc);
/*
proc  ./script.sh abc 123 +0ms
proc  stdout message 1 +10ms
proc  stderr message 1 +3ms
proc  stdout message 2 +46ms
proc  stderr message 2 +1ms
*/

// the process spawn args, stderr and stdout can be disabled
debugProc(proc, {spawnargs: false, stdout: false});
/*
proc  stderr message 1 +3ms
proc  stderr message 2 +1ms
*/

debugProc(proc, {decorate: 'name'});
/*
proc  ./script.sh: ./script.sh abc 123 +0ms
proc  ./script.sh: stdout message 1 +10ms
proc  ./script.sh: stderr message 1 +3ms
proc  ./script.sh: stdout message 2 +46ms
proc  ./script.sh: stderr message 2 +1ms
*/

debugProc(proc, {decorate: 'pid'});
/*
proc  pid 10425: ./script.sh abc 123 +0ms
proc  pid 10425: stdout message 1 +10ms
proc  pid 10425: stderr message 1 +3ms
proc  pid 10425: stdout message 2 +46ms
proc  pid 10425: stderr message 2 +1ms
*/

debugProc(proc, {
  decorate: function(proc) {
    return 'process-description: ';
  }
});
/*
proc  process-description: ./script.sh abc 123 +0ms
proc  process-description: stdout message 1 +10ms
proc  process-description: stderr message 1 +3ms
proc  process-description: stdout message 2 +46ms
proc  process-description: stderr message 2 +1ms
*/

Run examples

cd examples/
DEBUG=proc node example.js

License

MIT license - http://www.opensource.org/licenses/mit-license.php