- name: Require js_build_command variable
  fail:
    msg: js_build_command is required for this role
  when:
    - js_build_command is not defined
    - npm_command is not defined

# Set this unconditionally because people who were using old
# versions of things with npm_command to override don't want to
# stop overriding. We can remove this once we remove the npm
# versions of the jobs.
- name: Set js_build_command to npm_command for backwards compat
  when: npm_command is defined
  set_fact:
    js_build_command: '{{ npm_command }}'

- name: Check for yarn.lock
  when: js_build_tool is not defined
  stat:
    path: "{{ zuul_work_dir }}/yarn.lock"
    get_checksum: false
    get_mime: false
    get_md5: false
  register: yarn_lock_exists

- name: Set js_build_tool fact
  set_fact:
    js_build_tool: '{{ yarn_lock_exists.stat.exists | ternary("yarn", "npm") }}'
  when: js_build_tool is not defined

- name: Install javascript depends
  include_role:
    name: ensure-javascript-packages

- name: Run js build command
  command: "{{ js_build_tool }} {% if js_build_command not in npm_lifecycle_phases %} run {% endif %} {{ js_build_command }}"
  # Need to set DISPLAY to the value that will be set when the virtual
  # framebuffer is set up for doing browser tests.
  environment:
    DISPLAY: ':99'
    CI: 'true'
  args:
    chdir: "{{ zuul_work_dir }}"