test-env v1.0.1

SYNOPSIS

Bash has no ternary operator and if-statements do not read clearly inside a package.json. This program helps test environment variables and create conditional output.

EXAMPLE

package.json scripts likely want some context about their environment. In this example we want to add the --debug flag to the browserify program before we run it, but only if the NODE_ENV environment variable has not been set.

"scripts": {
  "build-js": "browserify $(test-env !NODE_ENV '--debug') browser/*.js > static/bundle.js"
}

USAGE

TESTING

Truthy Variables. If the test is truthy, Yes will be written to stdout. If the test is falsy, nothing will be output. If the test is false, and a third variable is supplied it will be printed.

$test-env VARIABLE_NAME "Yes"
$test-env VARIABLE_NAME "Yes" "No"

Falsy Variables. If the test is falsy, Yes will be written to stdout. If the test is falsy, nothing will be output. If the test is false, and a third variable is supplied it will be printed.

$test-env !USER "Yes"
$test-env !USER "Yes" "No"

COMPARING

The comparison operators for equality are supported

• == (or eq) Equal
• != (or not) Not Equal
• gt Greater Than
• lt Less Than
• gte Greater Than or Equal To
• lte Less Than or Equal To

More examples

$test-env USER "Yes"
Yes

$test-env SHLVL == 2 Yep Nope
Yep

$test-env SHLVL >= 1 Tak Niet
Tak