loopa

Loopa is a for loop for scripts. It will execute a command n times before exiting.

Installation

npm install --dev loopa or npx loopa

Usage

loopa 3 echo "a loop"

a loop
a loop
a loop

loopa 10 npm run some-script

(some-script executed 10 times)

loopa infinity echo "an infinite loop"

an infinite loop
an infinite loop
an infinite loop
...

loopa 3 1000 echo "one second interval"

one second interval
one second interval
one second interval

Usage with environment variables

Environment variables should be escaped:

FOO=foo loopa 100 echo \$FOO

foo
foo
foo
...

If you do not like escaping your environment variables you can do the following in your package.json file:

{
  "scripts": {
    "loop": "loopa 100 npm run echo-foo",
    "echo-foo": "FOO=foo echo $FOO"
  }
}

Accessing the iteration variable

The iteration variable is available under the $I (or \$I) env variable:

loopa 4 echo \$I

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License

MIT