From 98aa9f9bb04cd576d7e1391fb0972d853fb1d147 Mon Sep 17 00:00:00 2001
From: Monty Taylor <mordred@inaugust.com>
Date: Fri, 27 Jul 2018 09:34:22 -0400
Subject: [PATCH] Add a yarn role

Projects using yarn for dependencies can just run yarn commands instead
of npm commands. Add a yarn role that allows a project to do that.

Change-Id: I48a722ca55c88c6330114da3a2c035b1f84f92e1
---
 roles/yarn/README.rst         | 15 +++++++++++++++
 roles/yarn/defaults/main.yaml |  1 +
 roles/yarn/tasks/main.yaml    | 24 ++++++++++++++++++++++++
 roles/yarn/vars/main.yaml     |  9 +++++++++
 4 files changed, 49 insertions(+)
 create mode 100644 roles/yarn/README.rst
 create mode 100644 roles/yarn/defaults/main.yaml
 create mode 100644 roles/yarn/tasks/main.yaml
 create mode 100644 roles/yarn/vars/main.yaml

diff --git a/roles/yarn/README.rst b/roles/yarn/README.rst
new file mode 100644
index 000000000..87ae17dee
--- /dev/null
+++ b/roles/yarn/README.rst
@@ -0,0 +1,15 @@
+Run yarn command in a source directory. Assumes the appropriate version
+of yarn has been installed.
+
+**Role Variables**
+
+.. zuul:rolevar:: yarn_command
+
+   Command to run. If it's a standard lifecycle command, it will be run as
+   ``yarn {{ yarn_command }}``. Otherwise it will be run as
+   ``yarn run {{ yarn_command }}``.
+
+.. zuul:rolevar:: zuul_work_dir
+   :default: {{ zuul.project.src_dir }}
+
+   Directory to run yarn in.
diff --git a/roles/yarn/defaults/main.yaml b/roles/yarn/defaults/main.yaml
new file mode 100644
index 000000000..9739eb171
--- /dev/null
+++ b/roles/yarn/defaults/main.yaml
@@ -0,0 +1 @@
+zuul_work_dir: "{{ zuul.project.src_dir }}"
diff --git a/roles/yarn/tasks/main.yaml b/roles/yarn/tasks/main.yaml
new file mode 100644
index 000000000..f751cfdb8
--- /dev/null
+++ b/roles/yarn/tasks/main.yaml
@@ -0,0 +1,24 @@
+- name: Require yarn_command variable
+  fail:
+    msg: yarn_command is required for this role
+  when: yarn_command is not defined
+
+- name: Run yarn lifecycle command
+  when: yarn_command in yarn_lifecycle_phases
+  command: "yarn {{ yarn_command }} --verbose"
+  # 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'
+  args:
+    chdir: "{{ zuul_work_dir }}"
+
+- name: Run yarn custom command
+  when: yarn_command not in yarn_lifecycle_phases
+  command: "yarn run {{ yarn_command }} --verbose"
+  # 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'
+  args:
+    chdir: "{{ zuul_work_dir }}"
diff --git a/roles/yarn/vars/main.yaml b/roles/yarn/vars/main.yaml
new file mode 100644
index 000000000..5343f7036
--- /dev/null
+++ b/roles/yarn/vars/main.yaml
@@ -0,0 +1,9 @@
+yarn_lifecycle_phases:
+  - install
+  - pack
+  - publish
+  - restart
+  - start
+  - stop
+  - test
+  - version