/**
 * @module readField
 * @description Returns one field for a particular named object in a list of objects.
 * @param {[Object]} objects - The objects to search
 * @param {String} objectName - The name of the particular object to find
 * @param {String} fieldName - The name of the field for the group to return
 * @returns String - The specified value
 * @example {{ files | byPlatform | categorize(branch.diff.files_metadata) | readField('jvm', 'name') }}
 */

 * @description Returns the specified value if non-null, otherwise an empty array.
 * @param {Object} input - The object to investigate
 * @returns Object - The specified value if non-null, otherwise an empty array
 * @example {{ readField('jvm', 'files') | nullToEmpty }}
 */
function nullToEmpty(input) {
    let output;
    if (input) {
        output = input;
    } else {
        output = [];
    }
    console.log("nullToEmpty: " + output);

  {% for platform in platforms %}
  platform_label_{{ platform.name }}:
    if:
      - {{ ('platform_labels' | isEnabledAutomation(pr)) }}
      - {{ files | byPlatform | categorize(branch.diff.files_metadata) | readField(platform.name, 'files') | nullToEmpty | some }}
    run:
      - action: add-label@v1
        args:
          label: 'platform:{{ platform.name }}'
          color: '0000FF'
  {% endfor %}