foreach - Parallel command execution (in specific sub directories)

Introduction

foreach is an erlang escript that allows for parallel command execution in specified sub directories.

Build

bash$ gmake escript

Configuration

Create a .foreach configuration file and place it into the parent folder.

bash$ ls -l
.	..	.foreach	first	second	third	fourth
bash$ cat .foreach
%% .foreach configuration file
{
	{ default, "master" },
	[
		{ "1.x", [
			"first",
			"second",
			"third"
		]},
		{ "master", [
			"first",
			"second",
			"third",
			"fourth"
		]}
	]
}

Usage

To execute the command "echo Hello World" in all four sub folders, execute

bash$ foreach echo Hello World

To leverage a different folder set (e. g. '1.x' instead of master), use the -s command line switch. To change the number of worker processes, use the -n command line switch.

bash$ foreach -s 1.x -n 2 git tag -a -m 'Release 1.0.0' 1.0.0