#98 Follow-up: ensure wildcard version range constraint does work for…

… Ansible

default.vm-settings.yml

@@ -71,6 +71,14 @@ virtualbox:
 
 # Ansible local configuration.
 ansible:
+  # Ansible version to use for the provisioning. Supported version formats:
+  #   - exact version constraint, like 2.6.16, 2.9.0rc2 etc
+  #   - wildcard version range (.*): you can specify a pattern with a * wildcard.
+  #     For example 2.6.* is the equivalent of >=2.6.0 <2.7.0. This option
+  #     installs the latest available Ansible version within the given range
+  #     constraint. This is the default option.
+  #
+  # This project has been successfully tested with Ansible 2.6.
   version: 2.6.*
 
 # List of features to install. Some roles depend on each other, be careful.

provisioning/src/configuration.rb

@@ -127,6 +127,9 @@ def merge_default_settings
     self.set("vagrant.hostname", self.get("vagrant.hostname") + '.test');
     # Symbolize synced folder options.
     self.symbolize_synced_folder_options
+    # Set correct Ansible version to install when wildcard version constraint
+    # has been provided.
+    self.set_ansible_version
   end
 
   # Internal: Generate IP addres based on a Vagrant host name value (in the most
@@ -170,4 +173,27 @@ def get_git_credentials
     self.set("git_user_email", `git config --get user.email`.strip)
   end
 
+  # Internal: Vagrant doesn't support wildcards in Ansible version, but pip does.
+  # This method fixes this by looking up for the latest Ansible version within
+  # the given range constraint and setting up exact version to install.
+  #
+  # Returns nothing.
+  protected
+  def set_ansible_version
+    version = self.get("ansible.version").split(".")
+    if (version.length === 3 && version.last === "*")
+      require 'net/https'
+      uri = URI('https://releases.ansible.com/ansible/')
+      available_releases = Net::HTTP.get(uri)
+
+      latest_release = available_releases
+        .scan(/>ansible-(#{version[0]}\.#{version[1]}\.\d+[a-zA-Z0-9\-\.]*)\.tar.gz</)
+        .flatten
+        .sort_by { |v| Gem::Version.new(v) }
+        .last
+
+      self.set("ansible.version", latest_release)
+    end
+  end
+
 end