add pip support and some docs

.gitignore

@@ -0,0 +1 @@
+__pycache__

README.md

@@ -1,43 +1,39 @@
 # Packages
 
-## Supported
+Handels package management using system and language specific package tools
 
-Only Apt and Debian Stretch.
+## Defaults
 
-Other versions might work but are not tested.
+```
+# sets the default for packages.pkg , see *pkg*
+default_packages_pkg:
+	provider: system
+```
 
-## Parameters and defaults
-
-packages:
-  pkg: {}
-  repos: {}
+## Parameters
 
 All configuration is to be placed inside the `packages` dict.
 
 ```
-# dictionary of package names to install. The key is the name of the packages, value musst be != none as none is used as knock out.
-pkg: {}
+# name: *pkg*, see below for definition
+pkg:
 
-# dictionary of repositories to setup, the key is used as name for the repository. See **repo** for definition for the content
-repos: {}
+# name: *repo*, see below for definition
+repos:
+
+```
+
+**pkg**:
+```
+# can be "system" or "pip-system"
+provider: system
 ```
 
 **repo**:
 ```
-# url to repo, example: "http://www.deb-multimedia.org stretch main non-free"
-url: ''
-
-# only set either key, keyurl or keyid + keyserver
-
-# gpg key to add for this repo
-key: ''
-
-# url to download a gpg key for this repo from
-keyurl: ''
-
-# key id of the key to add, for example "36A1D7869245C8950F966E92D8576A8BA88D21E9"
-keyid: ''
-
-# key server to get the key from, for example "keyserver.ubuntu.com"
-keyserver:
+key:
+keyid:
+keyurl:
+keyurl:
+url:
 ```

defaults/main.yml

@@ -1,3 +1,6 @@
 packages:
   pkg: {}
   repos: {}
+
+default_packages_pkg:
+  provider: system

filter_plugins/packages_filters.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+class FilterModule(object):
+	def filters(self):
+		return {
+				'packages_by_provider': self.packages_by_provider
+			}
+
+	def packages_by_provider(self, packages, provider, defaults=False):
+		filtered_packages = []
+		for key, value in packages.items():
+			if value == None:
+				continue
+			if defaults:
+				package = dict(defaults)
+				package.update(dict(value))
+			else:
+				package = dict(value)
+			if package['provider'] == provider:
+				filtered_packages.append(key)
+		return filtered_packages

tasks/main.yml

@@ -1,14 +1,19 @@
 - name: filter package list
   set_fact:
-    pkgs: "{{ packages.pkg | dict2items | rejectattr('value', 'none') | map(attribute='key') | list }}"
+    pkgs_system: "{{ packages.pkg | packages_by_provider(provider='system', defaults=default_packages_pkg) }}"
+    pkgs_pip_system: "{{ packages.pkg | packages_by_provider(provider='pip-system', defaults=default_packages_pkg) }}"
 
 - name: list repositories to setup
   debug:
     var: packages.repos
     verbosity: 1
-- name: list packages to install
+- name: list system packages to install
   debug:
-    var: pkgs
+    var: pkgs_system
+    verbosity: 1
+- name: list pip packages to install
+  debug:
+    var: pkgs_pip_system
     verbosity: 1
 
 - name: install helper tools
@@ -33,6 +38,11 @@
 - name: ensure handlers are flushed
   meta: flush_handlers
 
-- name: install packages
+- name: install packages (system)
   apt:
-    pkg: "{{ pkgs }}"
+    pkg: "{{ pkgs_system }}"
+
+- name: install packages (pip-system)
+  pip:
+    name: "{{ pkgs_pip_system }}"
+    extra_args: "--break-system-packages"