Tweak and extend the pkgin module

- make path to pkgin a global and stop passing it around; it's not going
  to change while ansible is running
- add support for several new options:
  * upgrade
  * full_upgrade
  * force
  * clean
- allow for update_cache to be run in the same task as upgrading/installing
  packages instead of needing a separate task for that

packaging/os/pkgin.py

@@ -3,6 +3,7 @@
 
 # Copyright (c) 2013 Shaun Zinck <shaun.zinck at gmail.com>
 # Copyright (c) 2015 Lawrence Leonard Gilbert <larry@L2G.to>
+# Copyright (c) 2016 Jasper Lievisse Adriaanse <j at jasper.la>
 #
 # Written by Shaun Zinck
 # Based on pacman module written by Afterburn <http://github.com/afterburn>
@@ -33,6 +34,7 @@ version_added: "1.0"
 author:
     - "Larry Gilbert (L2G)"
     - "Shaun Zinck (@szinck)"
+    - "Jasper Lievisse Adriaanse (@jasperla)"
 notes:
     - "Known bug with pkgin < 0.8.0: if a package is removed and another
       package depends on it, the other package will be silently removed as
@@ -57,6 +59,34 @@ options:
         default: no
         choices: [ "yes", "no" ]
         version_added: "2.1"
+    upgrade:
+        description:
+          - Upgrade main packages to their newer versions
+        required: false
+        default: no
+        choices: [ "yes", "no" ]
+        version_added: "2.1"
+    full_upgrade:
+        description:
+          - Upgrade all packages to their newer versions
+        required: false
+        default: no
+        choices: [ "yes", "no" ]
+        version_added: "2.1"
+    clean:
+        description:
+          - Clean packages cache
+        required: false
+        default: no
+        choices: [ "yes", "no" ]
+        version_added: "2.1"
+    force:
+        description:
+          - Force package reinstall
+        required: false
+        default: no
+        choices: [ "yes", "no" ]
+        version_added: "2.1"
 '''
 
 EXAMPLES = '''
@@ -74,12 +104,24 @@ EXAMPLES = '''
 
 # Update repositories as a separate step
 - pkgin: update_cache=yes
+
+# Upgrade main packages (equivalent to C(pkgin upgrade))
+- pkgin: upgrade=yes
+
+# Upgrade all packages (equivalent to C(pkgin full-upgrade))
+- pkgin: full_upgrade=yes
+
+# Force-upgrade all packages (equivalent to C(pkgin -F full-upgrade))
+- pkgin: full_upgrade=yes force=yes
+
+# clean packages cache (equivalent to C(pkgin clean))
+- pkgin: clean=yes
 '''
 
 
 import re
 
-def query_package(module, pkgin_path, name):
+def query_package(module, name):
     """Search for the package by name.
 
     Possible return values:
@@ -89,7 +131,7 @@ def query_package(module, pkgin_path, name):
     """
 
     # test whether '-p' (parsable) flag is supported.
-    rc, out, err = module.run_command("%s -p -v" % pkgin_path)
+    rc, out, err = module.run_command("%s -p -v" % PKGIN_PATH)
 
     if rc == 0:
         pflag = '-p'
@@ -100,7 +142,7 @@ def query_package(module, pkgin_path, name):
 
     # Use "pkgin search" to find the package. The regular expression will
     # only match on the complete name.
-    rc, out, err = module.run_command("%s %s search \"^%s$\"" % (pkgin_path, pflag, name))
+    rc, out, err = module.run_command("%s %s search \"^%s$\"" % (PKGIN_PATH, pflag, name))
 
     # rc will not be 0 unless the search was a success
     if rc == 0:
@@ -162,37 +204,43 @@ def format_action_message(module, action, count):
         return message + "s"
 
 
-def format_pkgin_command(module, pkgin_path, command, package=None):
+def format_pkgin_command(module, command, package=None):
     # Not all commands take a package argument, so cover this up by passing
     # an empty string. Some commands (e.g. 'update') will ignore extra
     # arguments, however this behaviour cannot be relied on for others.
     if package is None:
         package = ""
 
-    vars = { "pkgin":   pkgin_path,
+    if module.params["force"]:
+        force = "-F"
+    else:
+        force = ""
+
+    vars = { "pkgin":   PKGIN_PATH,
              "command": command,
-             "package": package }
+             "package": package,
+             "force":   force}
 
     if module.check_mode:
         return "%(pkgin)s -n %(command)s %(package)s" % vars
     else:
-        return "%(pkgin)s -y %(command)s %(package)s" % vars
+        return "%(pkgin)s -y %(force)s %(command)s %(package)s" % vars
 
 
-def remove_packages(module, pkgin_path, packages):
+def remove_packages(module, packages):
 
     remove_c = 0
 
     # Using a for loop incase of error, we can report the package that failed
     for package in packages:
         # Query the package first, to see if we even need to remove
-        if not query_package(module, pkgin_path, package):
+        if not query_package(module, package):
             continue
 
         rc, out, err = module.run_command(
-            format_pkgin_command(module, pkgin_path, "remove", package))
+            format_pkgin_command(module, "remove", package))
 
-        if not module.check_mode and query_package(module, pkgin_path, package):
+        if not module.check_mode and query_package(module, package):
             module.fail_json(msg="failed to remove %s: %s" % (package, out))
 
         remove_c += 1
@@ -203,18 +251,18 @@ def remove_packages(module, pkgin_path, packages):
     module.exit_json(changed=False, msg="package(s) already absent")
 
 
-def install_packages(module, pkgin_path, packages):
+def install_packages(module, packages):
 
     install_c = 0
 
     for package in packages:
-        if query_package(module, pkgin_path, package):
+        if query_package(module, package):
             continue
 
         rc, out, err = module.run_command(
-            format_pkgin_command(module, pkgin_path, "install", package))
+            format_pkgin_command(module, "install", package))
 
-        if not module.check_mode and not query_package(module, pkgin_path, package):
+        if not module.check_mode and not query_package(module, package):
             module.fail_json(msg="failed to install %s: %s" % (package, out))
 
         install_c += 1
@@ -224,41 +272,97 @@ def install_packages(module, pkgin_path, packages):
 
     module.exit_json(changed=False, msg="package(s) already present")
 
-def update_package_db(module, pkgin_path):
+def update_package_db(module):
     rc, out, err = module.run_command(
-        format_pkgin_command(module, pkgin_path, "update"))
+        format_pkgin_command(module, "update"))
 
     if rc == 0:
-        return True
+        if re.search('database for.*is up-to-date\n$', out):
+            return False, "datebase is up-to-date"
+        else:
+            return True, "updated repository database"
     else:
         module.fail_json(msg="could not update package db")
 
+def do_upgrade_packages(module, full=False):
+    if full:
+        cmd = "full-upgrade"
+    else:
+        cmd = "upgrade"
+
+    rc, out, err = module.run_command(
+        format_pkgin_command(module, cmd))
+
+    if rc == 0:
+        if re.search('^nothing to do.\n$', out):
+            module.exit_json(changed=False, msg="nothing left to upgrade")
+    else:
+        module.fail_json(msg="could not %s packages" % cmd)
+
+def upgrade_packages(module):
+        do_upgrade_packages(module)
+
+def full_upgrade_packages(module):
+    do_upgrade_packages(module, True)
+
+def clean_cache(module):
+    rc, out, err = module.run_command(
+        format_pkgin_command(module, "clean"))
+
+    if rc == 0:
+        # There's no indication if 'clean' actually removed anything,
+        # so assume it did.
+        module.exit_json(changed=True, msg="cleaned caches")
+    else:
+        module.fail_json(msg="could not clean package cache")
 
 def main():
     module = AnsibleModule(
             argument_spec    = dict(
                 state        = dict(default="present", choices=["present","absent"]),
                 name         = dict(aliases=["pkg"], type='list'),
-                update_cache = dict(default='no', type='bool')),
+                update_cache = dict(default='no', type='bool'),
-            required_one_of = [['name', 'update_cache']],
+                upgrade      = dict(default='no', type='bool'),
+                full_upgrade = dict(default='no', type='bool'),
+                clean        = dict(default='no', type='bool'),
+                force        = dict(default='no', type='bool')),
+            required_one_of = [['name', 'update_cache', 'upgrade', 'full_upgrade', 'clean']],
             supports_check_mode = True)
 
-    pkgin_path = module.get_bin_path('pkgin', True, ['/opt/local/bin'])
+    global PKGIN_PATH
+    PKGIN_PATH = module.get_bin_path('pkgin', True, ['/opt/local/bin'])
 
-    p = module.params
+    module.run_command_environ_update = dict(LANG='C', LC_ALL='C', LC_MESSAGES='C', LC_CTYPE='C')
 
-    pkgs = p["name"]
+    p = module.params
 
     if p["update_cache"]:
-        update_package_db(module, pkgin_path)
+        c, msg = update_package_db(module)
+        if not (p['name'] or p["upgrade"] or p["full_upgrade"]):
+            module.exit_json(changed=c, msg=msg)
+
+    if p["upgrade"]:
+        upgrade_packages(module)
         if not p['name']:
-            module.exit_json(changed=True, msg='updated repository database')
+            module.exit_json(changed=True, msg='upgraded packages')
+
+    if p["full_upgrade"]:
+        full_upgrade_packages(module)
+        if not p['name']:
+            module.exit_json(changed=True, msg='upgraded all packages')
+
+    if p["clean"]:
+        clean_cache(module)
+        if not p['name']:
+            module.exit_json(changed=True, msg='cleaned caches')
+
+    pkgs = p["name"]
 
     if p["state"] == "present":
-        install_packages(module, pkgin_path, pkgs)
+        install_packages(module, pkgs)
 
     elif p["state"] == "absent":
-        remove_packages(module, pkgin_path, pkgs)
+        remove_packages(module, pkgs)
 
 # import module snippets
 from ansible.module_utils.basic import *