From a08002fd4468c3913e7a2786c89d7a0571060328 Mon Sep 17 00:00:00 2001
From: Monty Taylor <mordred@inaugust.com>
Date: Mon, 11 Dec 2017 11:44:22 -0600
Subject: [PATCH] Install yarn if needed in javascript jobs

Some javascript projects use yarn for dependencies instead of raw npm.
If a yarn.lock file is detected in the zuul_work_dir, install yarn and
use yarn to install dependencies.

Needed-By: I5864e1b2f9952fbc35b08ebdef348c4917564c37
Change-Id: I9ae7dd3b33b2b607c1c5a17632e2aeb12e339d15
---
 playbooks/javascript/pre-test.yaml              |  1 +
 playbooks/javascript/pre.yaml                   |  1 +
 .../install-javascript-packages/tasks/main.yaml | 17 +++++++++++++++++
 roles/install-yarn/README.rst                   |  8 ++++++++
 roles/install-yarn/defaults/main.yaml           |  1 +
 roles/install-yarn/tasks/Debian.yaml            | 14 ++++++++++++++
 roles/install-yarn/tasks/RedHat.yaml            |  8 ++++++++
 roles/install-yarn/tasks/main.yaml              | 15 +++++++++++++++
 roles/install-yarn/tasks/yarn.yaml              | 11 +++++++++++
 9 files changed, 76 insertions(+)
 create mode 100644 roles/install-yarn/README.rst
 create mode 100644 roles/install-yarn/defaults/main.yaml
 create mode 100644 roles/install-yarn/tasks/Debian.yaml
 create mode 100644 roles/install-yarn/tasks/RedHat.yaml
 create mode 100644 roles/install-yarn/tasks/main.yaml
 create mode 100644 roles/install-yarn/tasks/yarn.yaml

diff --git a/playbooks/javascript/pre-test.yaml b/playbooks/javascript/pre-test.yaml
index 0abfab9aa..7956fc181 100644
--- a/playbooks/javascript/pre-test.yaml
+++ b/playbooks/javascript/pre-test.yaml
@@ -5,6 +5,7 @@
       bindep_dir: "{{ zuul_work_dir }}"
     - test-setup
     - install-nodejs
+    - install-yarn
     # nodejs-test-dependencies requires sudo,
     # so we cannot inherit pre.yaml from javascript-base.
     - nodejs-test-dependencies
diff --git a/playbooks/javascript/pre.yaml b/playbooks/javascript/pre.yaml
index 747029e83..4f6a0547a 100644
--- a/playbooks/javascript/pre.yaml
+++ b/playbooks/javascript/pre.yaml
@@ -5,5 +5,6 @@
       bindep_dir: "{{ zuul_work_dir }}"
     - test-setup
     - install-nodejs
+    - install-yarn
     - revoke-sudo
     - install-javascript-packages
diff --git a/roles/install-javascript-packages/tasks/main.yaml b/roles/install-javascript-packages/tasks/main.yaml
index 2fbcdcd46..3c56b89f9 100644
--- a/roles/install-javascript-packages/tasks/main.yaml
+++ b/roles/install-javascript-packages/tasks/main.yaml
@@ -1,6 +1,23 @@
+- name: Check for yarn.lock file
+  stat:
+    path: "{{ zuul_work_dir }}/yarn.lock"
+    get_checksum: false
+    get_mime: false
+    get_md5: false
+  register: yarn_lock
+
+- name: Install yarn dependencies
+  command: yarn install
+  environment:
+    DISPLAY: ':99'
+  args:
+    chdir: "{{ zuul_work_dir }}"
+  when: yarn_lock.stat.exists
+
 - name: Install npm dependencies
   command: npm install --verbose
   environment:
     DISPLAY: ':99'
   args:
     chdir: "{{ zuul_work_dir }}"
+  when: not yarn_lock.stat.exists
diff --git a/roles/install-yarn/README.rst b/roles/install-yarn/README.rst
new file mode 100644
index 000000000..0720e978a
--- /dev/null
+++ b/roles/install-yarn/README.rst
@@ -0,0 +1,8 @@
+Install yarn from yarnpkg repos
+
+**Role Variables**
+
+.. zuul:rolevar:: zuul_work_dir
+   :default: {{ zuul.project.src_dir }}
+
+   The directory to work in.
diff --git a/roles/install-yarn/defaults/main.yaml b/roles/install-yarn/defaults/main.yaml
new file mode 100644
index 000000000..9739eb171
--- /dev/null
+++ b/roles/install-yarn/defaults/main.yaml
@@ -0,0 +1 @@
+zuul_work_dir: "{{ zuul.project.src_dir }}"
diff --git a/roles/install-yarn/tasks/Debian.yaml b/roles/install-yarn/tasks/Debian.yaml
new file mode 100644
index 000000000..3559acfd5
--- /dev/null
+++ b/roles/install-yarn/tasks/Debian.yaml
@@ -0,0 +1,14 @@
+- name: Add yarnpkg repository key
+  apt_key:
+    url: https://dl.yarnpkg.com/debian/pubkey.gpg
+  become: yes
+
+- name: Add yarnpkg apt source repository
+  apt_repository:
+    repo: "deb https://dl.yarnpkg.com/debian/ stable main"
+    state: present
+    update_cache: yes
+  become: yes
+
+- name: Install yarn
+  include: yarn.yaml
diff --git a/roles/install-yarn/tasks/RedHat.yaml b/roles/install-yarn/tasks/RedHat.yaml
new file mode 100644
index 000000000..8065b7fdf
--- /dev/null
+++ b/roles/install-yarn/tasks/RedHat.yaml
@@ -0,0 +1,8 @@
+- name: Add yarnpkg repo file
+  get_url:
+    url: https://dl.yarnpkg.com/rpm/yarn.repo
+    dest: /etc/yum.repos.d/yarn.repo
+  become: yes
+
+- name: Install yarn
+  include: yarn.yaml
diff --git a/roles/install-yarn/tasks/main.yaml b/roles/install-yarn/tasks/main.yaml
new file mode 100644
index 000000000..21e8348c7
--- /dev/null
+++ b/roles/install-yarn/tasks/main.yaml
@@ -0,0 +1,15 @@
+- name: Check for yarn.lock file
+  stat:
+    path: "{{ zuul_work_dir }}/yarn.lock"
+    get_checksum: false
+    get_mime: false
+    get_md5: false
+  register: yarn_lock
+
+- name: Install yarn if needed
+  include: "{{ item }}"
+  with_first_found:
+    - "{{ ansible_distribution }}.yaml"
+    - "{{ ansible_os_family }}.yaml"
+  when:
+    - yarn_lock.stat.exists
diff --git a/roles/install-yarn/tasks/yarn.yaml b/roles/install-yarn/tasks/yarn.yaml
new file mode 100644
index 000000000..b03565d57
--- /dev/null
+++ b/roles/install-yarn/tasks/yarn.yaml
@@ -0,0 +1,11 @@
+- name: Install yarn from yarnpkg.com
+  package:
+    name: yarn
+    state: latest
+  become: yes
+  tags:
+    # Ignore ANSIBLE0010: We really want latest version
+    - skip_ansible_lint
+
+- name: Output yarn version
+  command: yarn --version