Move plugin builds on libvirt to Fedora 35

This is the last version of Fedora that provided a ruby 2.7 package.

Unable to make snap builds work due to either dynamic linker errors, or apparmor
violations.  Unable to disable apparmor enforcement since the rules come in via
snap, but #include <> stuff from global scope, and the include paths aren't
compatible.  Unable to unload apparmor module since Ubuntu appears to have it
built directly into kernel.  Stopping the apparmor service only stops ability
to update rules, but doesn't disable the already-configured ones from breaking
builds.

A "sudo BUNDLE_SILENCE_ROOT_WARNING=true bundle install" is required in the VM
since some gems build native extensions, and those aren't installed or detected
properly by the subsequenct "bundle exec rake build".

Author: bkus

tools/vagrant-plugin-builder/Vagrantfile

@@ -13,7 +13,7 @@ Vagrant.configure("2") do |config|
   end
 
   config.vm.provider "libvirt" do |lv, override|
-    override.vm.box = "generic/ubuntu2204" # 1804 does not have virtiofs support.
+    override.vm.box = "generic/fedora35" # Fedora stopped supporting Ruby 2.7 after version 35.
     lv.qemu_use_session = false # required for virtiofs.
     lv.memory = 2 * 1024
     lv.cpus = 2

tools/vagrant-plugin-builder/ruby_development_provision.yml

@@ -12,25 +12,27 @@
     retries: 20
     delay: 10
     become: true
+    when: ansible_facts["os_family"] == "Debian"
 
   - name: Install apt packages
     apt:
       name: ["build-essential"]
       update_cache: yes
       # 1 hour
       cache_valid_time: 3600
-    become: yes
+    become: true
+    when: ansible_facts["os_family"] == "Debian"
 
   - name: Add user 'vagrant' to group 'vboxsf'
-    become: yes
+    become: true
     user:
       name: vagrant
       groups: vboxsf
       append: yes
     when: ansible_facts["virtualization_type"] == "virtualbox"
 
   - name: Mount shared folder
-    become: yes
+    become: true
     mount:
       path: /mnt/packer-mikrotik
       src: packer-mikrotik
@@ -39,14 +41,24 @@
       state: mounted
     when: ansible_facts["virtualization_type"] == "virtualbox"
 
+  - name: Ensure Ruby 2.7 build enviromment is present
+    become: true
+    ansible.builtin.dnf:
+      name: "{{ item }}"
+    loop:
+      - "@ruby:2.7"
+      - ruby-devel
+    when: ansible_facts["os_family"] == "RedHat"
+
   - name: Install Ruby snap
+    become: true
     # community.general.snap:
     # (fails since we are using ansible_local provisioner and it installs old Ansible version)
     snap:
       name: ruby
       channel: 2.7/stable # otherwise 3.1.2 is installed and vagrant 2.2.20.dev depends on (>= 2.6, < 3.1)
       classic: yes
-    become: yes
+    when: ansible_facts["os_family"] == "Debian"
 
     # Not installing since rvm.ruby fails
     # - name: Install roles from Ansible Galaxy

vagrant-plugins-routeros/Gemfile

@@ -3,9 +3,9 @@ source "https://rubygems.org"
 gemspec
 
 group :development do
-  gem "vagrant", git: "https://github.com/mitchellh/vagrant.git"
+  gem "vagrant", git: "https://github.com/hashicorp/vagrant.git"
 end
 
 # group :plugins do
 #   gem "vagrant-routeros", path: "."
-# end
+# end