From 8f223a6af235db3ff5fe54bc44785a55c02ff6ae Mon Sep 17 00:00:00 2001
From: Simo Aleksandrov <simo3003@icloud.com>
Date: Thu, 18 Nov 2021 10:46:00 +0200
Subject: [PATCH] feat: dokku_builder module (#129)

---
 README.md                   |  37 ++++++++++++
 library/dokku_builder.py    | 109 ++++++++++++++++++++++++++++++++++++
 molecule/default/verify.yml |  18 ++++++
 3 files changed, 164 insertions(+)
 create mode 100644 library/dokku_builder.py

diff --git a/README.md b/README.md
index 24bb3c1..7b42548 100644
--- a/README.md
+++ b/README.md
@@ -180,6 +180,43 @@ Create or destroy dokku apps
     state: absent
 ```
 
+### dokku_builder
+
+Manage the builder configuration for a given dokku application
+
+#### Parameters
+
+|Parameter|Choices/Defaults|Comments|
+|---------|----------------|--------|
+|app<br /><sup>*required*</sup>||The name of the app. This is required only if global is set to False.|
+|global|*Default:* False|If the property being set is global|
+|property<br /><sup>*required*</sup>||The property to be changed (e.g., `build-dir`, `selected`)|
+|value||The value of the builder property (leave empty to unset)|
+
+#### Example
+
+```yaml
+- name: Overriding the auto-selected builder
+  dokku_builder:
+    app: node-js-app
+    property: selected
+    value: dockerfile
+- name: Setting the builder to the default value
+  dokku_builder:
+    app: node-js-app
+    property: selected
+- name: Changing the build build directory
+  dokku_builder:
+    app: monorepo
+    property: build-dir
+    value: backend
+- name: Overriding the auto-selected builder globally
+  dokku_builder:
+    global: true
+    property: selected
+    value: herokuish
+```
+
 ### dokku_certs
 
 Manages ssl configuration for an app.
diff --git a/library/dokku_builder.py b/library/dokku_builder.py
new file mode 100644
index 0000000..1103392
--- /dev/null
+++ b/library/dokku_builder.py
@@ -0,0 +1,109 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+import subprocess
+
+from ansible.module_utils.basic import AnsibleModule
+
+DOCUMENTATION = """
+---
+module: dokku_builder
+short_description: Manage the builder configuration for a given dokku application
+options:
+  app:
+    description:
+      - The name of the app. This is required only if global is set to False.
+    required: True
+    default: null
+    aliases: []
+  property:
+    description:
+      - The property to be changed (e.g., `build-dir`, `selected`)
+    required: True
+    aliases: []
+  value:
+    description:
+      - The value of the builder property (leave empty to unset)
+    required: False
+    aliases: []
+  global:
+    description:
+      - If the property being set is global
+    required: False
+    default: False
+    aliases: []
+author: Simo Aleksandrov
+"""
+
+EXAMPLES = """
+- name: Overriding the auto-selected builder
+  dokku_builder:
+    app: node-js-app
+    property: selected
+    value: dockerfile
+- name: Setting the builder to the default value
+  dokku_builder:
+    app: node-js-app
+    property: selected
+- name: Changing the build build directory
+  dokku_builder:
+    app: monorepo
+    property: build-dir
+    value: backend
+- name: Overriding the auto-selected builder globally
+  dokku_builder:
+    global: true
+    property: selected
+    value: herokuish
+"""
+
+
+def dokku_builder(data):
+    is_error = True
+    has_changed = False
+    meta = {"present": False}
+
+    if data["global"] and data["app"]:
+        is_error = True
+        meta["error"] = 'When "global" is set to true, "app" must not be provided.'
+        return (is_error, has_changed, meta)
+
+    # Check if "value" is set and evaluates to a non-empty string, otherwise use an empty string
+    value = data["value"] if "value" in data else None
+    if not value:
+        value = ""
+
+    command = "dokku builder:set {0} {1} {2}".format(
+        "--global" if data["global"] else data["app"],
+        data["property"],
+        value,
+    )
+
+    try:
+        subprocess.check_call(command, shell=True)
+        is_error = False
+        has_changed = True
+        meta["present"] = True
+    except subprocess.CalledProcessError as e:
+        meta["error"] = str(e)
+
+    return (is_error, has_changed, meta)
+
+
+def main():
+    fields = {
+        "app": {"required": False, "type": "str"},
+        "property": {"required": True, "type": "str"},
+        "value": {"required": False, "type": "str", "no_log": True},
+        "global": {"required": False, "type": "bool"},
+    }
+
+    module = AnsibleModule(argument_spec=fields, supports_check_mode=False)
+    is_error, has_changed, result = dokku_builder(module.params)
+
+    if is_error:
+        module.fail_json(msg=result["error"], meta=result)
+    module.exit_json(changed=has_changed, meta=result)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/molecule/default/verify.yml b/molecule/default/verify.yml
index 1fd3edd..5c15a73 100644
--- a/molecule/default/verify.yml
+++ b/molecule/default/verify.yml
@@ -189,3 +189,21 @@
       msg: |
         'ms' not found in output of 'dokku apps:list':
         {{ dokku_apps.stdout }}
+  # Testing dokku_builder
+  - name: Configuring the builder for an app
+    dokku_builder:
+      app: example-app
+      property: build-dir
+      value: /app
+
+  - name: Get builder output # noqa 301
+    command: dokku builder:report example-app
+    register: dokku_builder
+
+  - name: Check that the build dir was set correctly
+    assert:
+      that:
+      - "'/app' in dokku_builder.stdout"
+      msg: |-
+        build-dir '/app' not found in output of 'dokku builder':
+        {{ dokku_builder.stdout }}