Modify existing YAML values using Gulp

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I'm pretty new to YAML and I feel like I missing something or making my own life harder than it should be.

I'm using Gulp to run a bunch of tasks to minify CSS/JS and lint my code, but for the final build I need to modify a YAML file that contains some configuration values.

This is part of my YAML file:

- adx_name: RedirectUri
  adx_sitesettingid: 3745e5fe-2b95-eb11-b1ac-000d3a2cd507
  adx_value: https://example.com/signin

The YAML file contains a bunch of config but I just need to change the adx_value where adx_name = RedirectUri.

I don't seem to be able to find any Gulp plugins that work with YAML directly, other than those that are able to read YAML or append to YAML files. What I need to be able to do it edit the file and write new values at the correct location in the file.

gulp yaml
1 Answers

You can do this pretty easily with gulp-replace.

gulp.task('yaml-replace', function () {
  return gulp.src('./test.yaml')
    .pipe(replace(/(?<=adx_name:\s)(RedirectUri)/g, 'myReplacement'))  // positive lookbehind
    .pipe(gulp.dest('./yaml'));
});

The replace function can take a string or regex and replace with a string or function.

Result:

- adx_name: myReplacement
  adx_sitesettingid: 3745e5fe-2b95-eb11-b1ac-000d3a2cd507
  adx_value: https://example.com/signin
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