Really simple npm CLI module for evaluating CLI parameters and exit a process based on the expressions output (all truthy values = exit code 0, else is exit code 1).
$ npm install
$ npm dedupe // if npm < 3
$ npm run build
Replace expr-exit-code with node dist/index.js if in development.
$ npm install -g expr-exit-code
// view available CLI parameters:
$ expr-exit-code --help
// 5>6 is false, exit code 1:
$ expr-exit-code -e "5>6"
// 0 is falsy, exit code 1:
$ expr-exit-code -e "1-1"
// message if expression is truthy:
$ expr-exit-code -e "1+1" -t "It is truthy"
// message if expression is falsy:
$ expr-exit-code -e "0+0" -f "It is falsy"