Add venv_build_group variable

In order to be flexible and get rid of hardcoded repo_all group, new
variable named `venv_build_group` was added. It's set to repo_all by
default, so it is not changing current behaviour remains

Change-Id: I30c2c26abeb103de63aff0946ec7783f902886b8

defaults/main.yml

@@ -81,7 +81,7 @@ venv_pip_build_env: {}
 # Default arguments to pass to pip when installing into
 # the venv.
 venv_default_pip_install_args: >-
-  {%- if (groups['repo_all'] is defined) and (groups['repo_all'] | length > 0) and (venv_wheel_build_enable | bool) %}
+  {%- if (groups[venv_build_group] is defined) and (groups[venv_build_group] | length > 0) and (venv_wheel_build_enable | bool) %}
   --find-links {{ openstack_repo_url | default('http://localhost') }}/os-releases/{{ openstack_release | default('master') }}/{{ _venv_build_dist_arch }}/wheels
   --trusted-host {{ (openstack_repo_url | default('http://localhost')) | urlsplit('hostname') }}
   {%- endif %}
@@ -124,6 +124,10 @@ venv_wheels_rebuild: no
 # set to false.
 venv_wheel_build_enable: True
 
+# Set the name of the ansible group, that will be used
+# to identify suitable host to build wheels on
+venv_build_group: repo_all
+
 # Set the host where the wheels will be built.
 # If this host is not the same as the target host, then
 # python wheels will be built in order to speed up the

releasenotes/notes/venv_build_group_variable-39f05cbdda59cd7e.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Added variable ``venv_build_group`` that allows to provide an ansible group
+    name, that will be used to find wheels build targets. Default is `repo_all`

tasks/main.yml

@@ -33,7 +33,7 @@
     gather_subset: '!all:min'
   delegate_to: "{{ item }}"
   delegate_facts: true
-  with_items: "{{ groups['repo_all'] | default([inventory_hostname]) }}"
+  with_items: "{{ groups[venv_build_group] | default([inventory_hostname]) }}"
   tags:
     - always
   run_once: true
@@ -63,7 +63,7 @@
     msg: >-
       You are trying to build wheels for the distribution or architecture
       that you don't have build host for.
-      Please, ensure that you have at least 1 host in 'repo_all' group
+      Please, ensure that you have at least 1 host in {{ venv_build_group }} group
       with the following distribution: {{ _venv_build_dist_arch | replace('-', ' ') }}
       Otherwise, consider adding matching OS to the group or set
       `venv_wheel_build_enable: False`. Note, that you can run

vars/main.yml

@@ -29,8 +29,8 @@
 # Auto generation process:
 # * The current inventory hostname is inserted as the first build target
 #   and will be used if no other suitable targets are found.
-# * It then iterates over the group name "repo_all" and if any targets
-#   are found it will catagorize them by distro and cpu architecture
+# * It then iterates over the group defined by {{ venv_build_group }} and if any
+#   targets are found it will catagorize them by distro and cpu architecture
 #   and add them to the list of targets.
 # * If no build target is found for matching the distro and cpu
 #   criteria of the active inventory item, the generator will fall
@@ -44,7 +44,7 @@
 #                    for the repo servers.
 venv_build_targets: |-
   {% set targets = {} %}
-  {% for item in ((groups['repo_all'] | default([])) | reverse) %}
+  {% for item in ((groups[venv_build_group] | default([])) | reverse) %}
   {%   set distro = (hostvars[item]['ansible_facts']['distribution'] | lower) | replace(' ', '_') %}
   {%   set distro_ver = hostvars[item]['ansible_facts']['distribution_version'].split('.')[:2] | join('.') %}
   {%   set arch = hostvars[item]['ansible_facts']['architecture'] %}