- name: Check to see if the constraints file exists
  stat:
    path: "{{ tox_constraints_file }}"
    get_checksum: false
    get_mime: false
    get_md5: false
  register: stat_results
  when: tox_constraints_file is defined

- name: Fail if constraints file is missing
  when: tox_constraints_file is defined and not stat_results.stat.exists
  fail:
    msg: tox_constraints_file is defined but was not found

- name: Record file location
  set_fact:
    tox_constraints_env:
      TOX_CONSTRAINTS_FILE: "{{ tox_constraints_file }}"
      # Backward compatibility, to be removed
      UPPER_CONSTRAINTS_FILE: "{{ tox_constraints_file }}"
  when: tox_constraints_file is defined

- 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 yarn dependencies
  command: yarn install
  environment:
    DISPLAY: ':99'
  args:
    chdir: "{{ zuul_work_dir }}"
  when: js_build_tool == 'yarn'

- name: Install npm dependencies
  command: npm install --verbose
  environment: "{{ npm_environment | combine(tox_constraints_env | default({})) }}"
  args:
    chdir: "{{ zuul_work_dir }}"
  when: js_build_tool == 'npm'