add centos support

Author: Gustavo Muniz do Carmo

README.md

@@ -13,19 +13,23 @@ Ansible role to install [Ansible](https://www.ansible.com).
     - codeyourinfra.ansible
 ```
 
-The role requires the *ansible_python_version* variable, obtained through the [gathering facts phase](https://docs.ansible.com/ansible/latest/user_guide/playbooks_variables.html#information-discovered-from-systems-facts). So please don't turn off facts.
+The role requires some variables obtained through the [gathering facts phase](https://docs.ansible.com/ansible/latest/user_guide/playbooks_variables.html#information-discovered-from-systems-facts). So please don't turn off facts.
 
 ## Build process
 
 The build process is performed in [Travis CI](https://travis-ci.org/codeyourinfra/ansible). During the build, the role is tested by using [Molecule](https://molecule.readthedocs.io).
 
 ## Test yourself
 
-Inside your [Python virtual environment](https://docs.python.org/3/tutorial/venv.html), run:
+First of all, create your [Python virtual environment](https://docs.python.org/3/tutorial/venv.html) and activate it:
 
-`pip install -r requirements.txt`
+`python -m venv env && source env/bin/activate`
 
-And then:
+After that, install all requirements:
+
+`pip install wheel && pip install -r requirements.txt`
+
+Finally, execute the test:
 
 `molecule test`
 

meta/main.yml

@@ -11,6 +11,9 @@ galaxy_info:
       versions:
         - bionic
         - xenial
+    - name: CentOS
+      versions:
+        - 7
 
   galaxy_tags:
     - ansible

molecule/default/Dockerfile.j2

@@ -6,9 +6,10 @@ FROM {{ item.registry.url }}/{{ item.image }}
 FROM {{ item.image }}
 {% endif %}
 
-RUN if [ $(command -v apt-get) ]; then apt-get update && apt-get install -y python sudo bash ca-certificates && apt-get clean; \
-    elif [ $(command -v dnf) ]; then dnf makecache && dnf --assumeyes install python sudo python-devel python2-dnf bash && dnf clean all; \
+RUN if [ $(command -v apt-get) ]; then apt-get update && apt-get install -y python sudo bash ca-certificates python-apt aptitude && apt-get clean; \
+    elif [ $(command -v dnf) ]; then dnf makecache && dnf --assumeyes install python2 sudo python2-devel && dnf clean all; \
     elif [ $(command -v yum) ]; then yum makecache fast && yum install -y python sudo yum-plugin-ovl bash && sed -i 's/plugins=0/plugins=1/g' /etc/yum.conf && yum clean all; \
     elif [ $(command -v zypper) ]; then zypper refresh && zypper install -y python sudo bash python-xml && zypper clean -a; \
     elif [ $(command -v apk) ]; then apk update && apk add --no-cache python sudo bash ca-certificates; \
     elif [ $(command -v xbps-install) ]; then xbps-install -Syu && xbps-install -y python sudo bash ca-certificates && xbps-remove -O; fi
+

molecule/default/molecule.yml

@@ -8,8 +8,16 @@ lint:
 platforms:
   - name: xenial
     image: ubuntu:xenial
+    groups:
+      - ubuntu
   - name: bionic
     image: ubuntu:bionic
+    groups:
+      - ubuntu
+  - name: centos7
+    image: centos:7
+    groups:
+      - centos
 provisioner:
   name: ansible
   lint:

tasks/centos.yml

@@ -0,0 +1,7 @@
+---
+- name: Install EPEL
+  yum:
+    name: "{{ item }}"
+  loop:
+    - epel-release
+    - ansible

tasks/main.yml

@@ -1,25 +1,2 @@
----
-- name: Install required packages
-  apt:
-    name: "{{ item }}"
-  loop:
-    - libssl-dev
-    - libffi-dev
-
-- name: Python version
-  debug:
-    var: ansible_python_version
-
-- name: Install pip3/uninstall pip, if python3.
-  apt:
-    name: python3-pip
-    state: "{{ 'present' if ansible_python_version is version('3', '>=') else 'absent' }}"
-
-- name: Install pip/unsintall pip3, if python.
-  apt:
-    name: python-pip
-    state: "{{ 'present' if ansible_python_version is version('3', '<') else 'absent' }}"
-
-- name: Install Ansible
-  pip:
-    name: ansible
+- name: Execute the appropriate tasks, depending on the distribution.
+  include: "{{ ansible_distribution | lower }}.yml"

tasks/ubuntu.yml

@@ -0,0 +1,25 @@
+---
+- name: Install required packages
+  apt:
+    name: "{{ item }}"
+  loop:
+    - libssl-dev
+    - libffi-dev
+
+- name: Python version
+  debug:
+    var: ansible_python_version
+
+- name: Install pip3/uninstall pip, if python3.
+  apt:
+    name: python3-pip
+    state: "{{ 'present' if ansible_python_version is version('3', '>=') else 'absent' }}"
+
+- name: Install pip/unsintall pip3, if python.
+  apt:
+    name: python-pip
+    state: "{{ 'present' if ansible_python_version is version('3', '<') else 'absent' }}"
+
+- name: Install Ansible
+  pip:
+    name: ansible