You can also consider using Grunt (The JavaScript Task Runner). Can be easily integrated with shell. It supports reading YAML (grunt.file.readYAML) and JSON (grunt.file.readJSON) files.
This can be achieved by creating a task in Gruntfile.js (or Gruntfile.coffee), e.g.:
module.exports = function (grunt) {
grunt.registerTask('foo', ['load_yml']);
grunt.registerTask('load_yml', function () {
var data = grunt.file.readYAML('foo.yml');
Object.keys(data).forEach(function (g) {
// ... switch (g) { case 'my_key':
});
});
};
then from shell just simply run grunt foo (check grunt --help for available tasks).
Further more you can implement exec:foo tasks (grunt-exec) with input variables passed from your task (foo: { cmd: 'echo bar <%= foo %>' }) in order to print the output in whatever format you want, then pipe it into another command.
There is also similar tool to Grunt, it's called gulp with additional plugin gulp-yaml.
Install via: npm install --save-dev gulp-yaml
Sample usage:
var yaml = require('gulp-yaml');
gulp.src('./src/*.yml')
.pipe(yaml())
.pipe(gulp.dest('./dist/'))
gulp.src('./src/*.yml')
.pipe(yaml({ space: 2 }))
.pipe(gulp.dest('./dist/'))
gulp.src('./src/*.yml')
.pipe(yaml({ safe: true }))
.pipe(gulp.dest('./dist/'))
To more options to deal with YAML format, check YAML site for available projects, libraries and other resources which can help you to parse that format.
Other tools:
parses, reads and creates JSON