child-process-debug
v0.0.7
Published
Convenience methods for debugging child-process
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child-process-debug
Convenience methods for debugging child processes in Node.JS. Child processes will be started with --debug
if the
parent was started with --debug
and the children will each get their own increasing port number based off the
parent's port number. The default port is 5858. If you add --debug-brk
that will also get passed to the children.
Example
var childProcessDebug = require('child-process-debug');
for (var i = 0; i < 4; i++) {
//if this script wasn't run with --debug this will spawn node example.js [0-3]
//if this script was run with --debug, this will spawn node --debug=[5859-5862] example.js [0-3]
childProcessDebug.spawn(['example.js', i]);
}
Methods
spawn([command][, args][, options])
This takes the exact same arguments as child_process.spawn
and if the parent had debugging turned on (via --debug),
it'll turn on debugging for the spawned child. command
is also optional (unlike child_process.spawn
) and defaults
to process.execPath
.
The ChildProcess returned from spawn will have a property called debugPort
indicating the debug port chosen for that
child or undefined.
fork(modulePath [, args][, options])
This takes the exact same arguments as child_process.fork
and if the parent had debugging turned on (via --debug),
it'll turn on debugging for the spawned child. Return is the same as spawn
above.
nextPort()
Returns the next debug port that comes after the current process's debug port. If the current process doesn't have
debug turned on then this will return undefined. This is useful if you're not using spawn
and want to specify the
--debug=port
argument yourself.
exitWithParent(child)
Kill's the spawned child when the parent dies. This will not work if the parent is killed with SIGKILL.
port()
Returns the current process's debug port or undefined if debug is not turned on.
debugBreak()
Returns true if the current process has the flag --debug-brk
.
By James Hartig