Controlling task flow with conditionals

Sometimes a just.config.js includes tasks that are skipped depending on the arguments that are given. Use a condition() function to decide to run a task or to skip it.

Running tasks in a series

As we have seen, tasks can be run in a series.

const { task, series } = require('just-task');

task('clean', function () {
  // clean stuff
});

task('babel', function () {
  // run babel over some files
});

task('test', function () {
  // run babel over some files
});

task('build', series('clean', 'babel', 'test'));

We can conditionally skip the test task by some argument like --skip-test

const { task, series, option, argv, condition } = require('just-task');

// First define a 'skip-test' option
option('skip-test');

task('clean', function () {
  // clean stuff
});

task('babel', function () {
  // run babel over some files
});

task('test', function () {
  // run babel over some files
});

task(
  'build',
  series(
    'clean',
    'babel',
    condition('test', () => !argv()['skip-test']),
  ),
);

Now you can skip the test task by passing an argument like this:

$ just build --skip-test