Update homebrew_tap to support custom tap URL via optional 'url' option (#2672)

This allows doing 'brew tap <url>' where the URL is not assumed to be on GitHub,
and the protocol doesn't have to be HTTP. Any location and protocol that git can
handle is fine.

While at it, allow proper `list` type support for 'name' option and update
module documentation for option aliases.

packaging/os/homebrew_tap.py

@@ -2,6 +2,8 @@
 # -*- coding: utf-8 -*-
 
 # (c) 2013, Daniel Jaouen <dcj24@cornell.edu>
+# (c) 2016, Indrajit Raychaudhuri <irc+code@indrajit.com>
+#
 # Based on homebrew (Andrew Dunham <andrew@du.nham.ca>)
 #
 # This file is part of Ansible
@@ -24,16 +26,29 @@ import re
 DOCUMENTATION = '''
 ---
 module: homebrew_tap
-author: "Daniel Jaouen (@danieljaouen)"
+author:
+    - "Indrajit Raychaudhuri (@indrajitr)"
+    - "Daniel Jaouen (@danieljaouen)"
 short_description: Tap a Homebrew repository.
 description:
     - Tap external Homebrew repositories.
 version_added: "1.6"
 options:
-    tap:
+    name:
         description:
-            - The repository to tap.
+            - The GitHub user/organization repository to tap.
         required: true
+        aliases: ['tap']
+    url:
+        description:
+            - The optional git URL of the repository to tap. The URL is not
+              assumed to be on GitHub, and the protocol doesn't have to be HTTP.
+              Any location and protocol that git can handle is fine.
+        required: false
+        version_added: "2.2"
+        note:
+            - I(name) option may not be a list of multiple taps (but a single
+              tap instead) when this option is provided.
     state:
         description:
             - state of the repository.
@@ -44,9 +59,10 @@ requirements: [ homebrew ]
 '''
 
 EXAMPLES = '''
-homebrew_tap: tap=homebrew/dupes state=present
-homebrew_tap: tap=homebrew/dupes state=absent
-homebrew_tap: tap=homebrew/dupes,homebrew/science state=present
+homebrew_tap: name=homebrew/dupes
+homebrew_tap: name=homebrew/dupes state=absent
+homebrew_tap: name=homebrew/dupes,homebrew/science state=present
+homebrew_tap: name=telemachus/brew url=https://bitbucket.org/telemachus/brew
 '''
 
 
@@ -70,7 +86,7 @@ def already_tapped(module, brew_path, tap):
     return tap_name in taps
 
 
-def add_tap(module, brew_path, tap):
+def add_tap(module, brew_path, tap, url=None):
     '''Adds a single tap.'''
     failed, changed, msg = False, False, ''
 
@@ -86,6 +102,7 @@ def add_tap(module, brew_path, tap):
             brew_path,
             'tap',
             tap,
+            url,
         ])
         if already_tapped(module, brew_path, tap):
             changed = True
@@ -183,7 +200,8 @@ def remove_taps(module, brew_path, taps):
 def main():
     module = AnsibleModule(
         argument_spec=dict(
-            name=dict(aliases=['tap'], required=True),
+            name=dict(aliases=['tap'], type='list', required=True),
+            url=dict(default=None, required=False),
             state=dict(default='present', choices=['present', 'absent']),
         ),
         supports_check_mode=True,
@@ -195,10 +213,22 @@ def main():
         opt_dirs=['/usr/local/bin']
     )
 
-    taps = module.params['name'].split(',')
+    taps = module.params['name']
+    url = module.params['url']
 
     if module.params['state'] == 'present':
-        failed, changed, msg = add_taps(module, brew_path, taps)
+        if url is None:
+            # No tap URL provided explicitly, continue with bulk addition
+            # of all the taps.
+            failed, changed, msg = add_taps(module, brew_path, taps)
+        else:
+            # When an tap URL is provided explicitly, we allow adding
+            # *single* tap only. Validate and proceed to add single tap.
+            if len(taps) > 1:
+                msg = "List of muliple taps may not be provided with 'url' option."
+                module.fail_json(msg=msg)
+            else:
+                failed, changed, msg = add_tap(module, brew_path, taps[0], url)
 
         if failed:
             module.fail_json(msg=msg)