pipx - new module (#3507)

* pipx - new module

* using python instead of python3

* removed ensure_path as it is unused

* ensuring we are running the same python as Ansible

* changed the last solution to adding a pipx_path parameter to the module, with a sensible default

* added docs for the new parameter

* changed param name to executable, and customized it for Darwin

* use executable if passed, otherwise use python -m pipx

* minor update

* added examples

* Update plugins/modules/packaging/language/pipx.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/packaging/language/pipx.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/packaging/language/pipx.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* tests names 324 -> 3.24.0

* ensure tox is uninstalled by the beginning of the test

* Renamed option+suggestions from PR

* improved idempotency

* fixed sanity

* fixed test

Co-authored-by: Felix Fontein <felix@fontein.de>

tests/integration/targets/pipx/aliases

@@ -0,0 +1,4 @@
+destructive
+shippable/posix/group2
+skip/python2
+skip/python3.5

tests/integration/targets/pipx/tasks/main.yml

@@ -0,0 +1,92 @@
+---
+- name: install pipx
+  pip:
+    name: pipx
+    extra_args: --user
+
+##############################################################################
+- name: ensure application tox is uninstalled
+  community.general.pipx:
+    state: absent
+    name: tox
+  register: uninstall_tox
+
+- name: install application tox
+  community.general.pipx:
+    name: tox
+  register: install_tox
+
+- name: install application tox again
+  community.general.pipx:
+    name: tox
+  register: install_tox_again
+  ignore_errors: yes
+
+- name: install application tox again force
+  community.general.pipx:
+    name: tox
+    force: yes
+  register: install_tox_again_force
+
+- name: uninstall application tox
+  community.general.pipx:
+    state: absent
+    name: tox
+  register: uninstall_tox
+
+- name: check assertions tox
+  assert:
+    that:
+        - install_tox is changed
+        - "'tox' in install_tox.application"
+        - install_tox_again is not changed
+        - install_tox_again_force is changed
+        - uninstall_tox is changed
+        - "'tox' not in uninstall_tox.application"
+
+##############################################################################
+- name: install application tox 3.24.0
+  community.general.pipx:
+    name: tox
+    source: tox==3.24.0
+  register: install_tox_324
+
+- name: reinstall tox 3.24.0
+  community.general.pipx:
+    name: tox
+    state: reinstall
+  register: reinstall_tox_324
+
+- name: upgrade tox 3.24.0
+  community.general.pipx:
+    name: tox
+    state: upgrade
+  register: upgrade_tox_324
+
+- name: downgrade tox 3.24.0
+  community.general.pipx:
+    name: tox
+    source: tox==3.24.0
+    force: yes
+  register: downgrade_tox_324
+
+- name: cleanup tox 3.24.0
+  community.general.pipx:
+    state: absent
+    name: tox
+  register: uninstall_tox_324
+
+- name: check assertions tox 3.24.0
+  assert:
+    that:
+        - install_tox_324 is changed
+        - "'tox' in install_tox_324.application"
+        - install_tox_324.application.tox.version == '3.24.0'
+        - reinstall_tox_324 is changed
+        - reinstall_tox_324.application.tox.version == '3.24.0'
+        - upgrade_tox_324 is changed
+        - upgrade_tox_324.application.tox.version != '3.24.0'
+        - downgrade_tox_324 is changed
+        - downgrade_tox_324.application.tox.version == '3.24.0'
+        - uninstall_tox_324 is changed
+        - "'tox' not in uninstall_tox_324.application"