Add homebrew_tap module.

library/packaging/homebrew_tap

@@ -0,0 +1,215 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# (c) 2013, Daniel Jaouen <dcj24@cornell.edu>
+# Based on homebrew (Andrew Dunham <andrew@du.nham.ca>)
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+import re
+
+DOCUMENTATION = '''
+---
+module: homebrew_tap
+author: Daniel Jaouen
+short_description: Tap a Homebrew repository.
+description:
+    - Tap external Homebrew repositories.
+version_added: "1.4"
+options:
+    tap:
+        description:
+            - The repository to tap.
+        required: true
+    state:
+        description:
+            - state of the repository.
+        choices: [ 'present', 'absent' ]
+        required: false
+        default: 'present'
+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
+'''
+
+
+def a_valid_tap(tap):
+    '''Returns True if the tap is valid.'''
+    regex = re.compile(r'^(\S+)/(homebrew-)?(\w+)$')
+    return regex.match(tap)
+
+
+def already_tapped(module, brew_path, tap):
+    '''Returns True if already tapped.'''
+
+    rc, out, err = module.run_command([
+        brew_path,
+        'tap',
+    ])
+    taps = [tap_.strip().lower() for tap_ in out.split('\n') if tap_]
+    return tap.lower() in taps
+
+
+def add_tap(module, brew_path, tap):
+    '''Adds a single tap.'''
+    failed, changed, msg = False, False, ''
+
+    if not a_valid_tap(tap):
+        failed = True
+        msg = 'not a valid tap: %s' % tap
+
+    elif not already_tapped(module, brew_path, tap):
+        if module.check_mode:
+            module.exit_json(changed=True)
+
+        rc, out, err = module.run_command([
+            brew_path,
+            'tap',
+            tap,
+        ])
+        if already_tapped(module, brew_path, tap):
+            changed = True
+            msg = 'successfully tapped: %s' % tap
+        else:
+            failed = True
+            msg = 'failed to tap: %s' % tap
+
+    else:
+        msg = 'already tapped: %s' % tap
+
+    return (failed, changed, msg)
+
+
+def add_taps(module, brew_path, taps):
+    '''Adds one or more taps.'''
+    failed, unchanged, added, msg = False, 0, 0, ''
+
+    for tap in taps:
+        (failed, changed, msg) = add_tap(module, brew_path, tap)
+        if failed:
+            break
+        if changed:
+            added += 1
+        else:
+            unchanged += 1
+
+    if failed:
+        msg = 'added: %d, unchanged: %d, error: ' + msg
+        msg = msg % (added, unchanged)
+    elif added:
+        changed = True
+        msg = 'added: %d, unchanged: %d' % (added, unchanged)
+    else:
+        msg = 'added: %d, unchanged: %d' % (added, unchanged)
+
+    return (failed, changed, msg)
+
+
+def remove_tap(module, brew_path, tap):
+    '''Removes a single tap.'''
+    failed, changed, msg = False, False, ''
+
+    if not a_valid_tap(tap):
+        failed = True
+        msg = 'not a valid tap: %s' % tap
+
+    elif already_tapped(module, brew_path, tap):
+        if module.check_mode:
+            module.exit_json(changed=True)
+
+        rc, out, err = module.run_command([
+            brew_path,
+            'untap',
+            tap,
+        ])
+        if not already_tapped(module, brew_path, tap):
+            changed = True
+            msg = 'successfully untapped: %s' % tap
+        else:
+            failed = True
+            msg = 'failed to untap: %s' % tap
+
+    else:
+        msg = 'already untapped: %s' % tap
+
+    return (failed, changed, msg)
+
+
+def remove_taps(module, brew_path, taps):
+    '''Removes one or more taps.'''
+    failed, unchanged, removed, msg = False, 0, 0, ''
+
+    for tap in taps:
+        (failed, changed, msg) = remove_tap(module, brew_path, tap)
+        if failed:
+            break
+        if changed:
+            removed += 1
+        else:
+            unchanged += 1
+
+    if failed:
+        msg = 'removed: %d, unchanged: %d, error: ' + msg
+        msg = msg % (removed, unchanged)
+    elif removed:
+        changed = True
+        msg = 'removed: %d, unchanged: %d' % (removed, unchanged)
+    else:
+        msg = 'removed: %d, unchanged: %d' % (removed, unchanged)
+
+    return (failed, changed, msg)
+
+
+def main():
+    module = AnsibleModule(
+        argument_spec=dict(
+            name=dict(aliases=['tap'], required=True),
+            state=dict(default='present', choices=['present', 'absent']),
+        ),
+        supports_check_mode=True,
+    )
+
+    brew_path = module.get_bin_path(
+        'brew',
+        required=True,
+        opt_dirs=['/usr/local/bin']
+    )
+
+    taps = module.params['name'].split(',')
+
+    if module.params['state'] == 'present':
+        failed, changed, msg = add_taps(module, brew_path, taps)
+
+        if failed:
+            module.fail_json(msg=msg)
+        else:
+            module.exit_json(changed=changed, msg=msg)
+
+    elif module.params['state'] == 'absent':
+        failed, changed, msg = remove_taps(module, brew_path, taps)
+
+        if failed:
+            module.fail_json(msg=msg)
+        else:
+            module.exit_json(changed=changed, msg=msg)
+
+# this is magic, see lib/ansible/module_common.py
+#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
+main()