Merge pull request #180 from rmohr/dnf

dnf plugin

docs/buckets/dnf.md

@@ -0,0 +1,20 @@
+# DNF
+
+Used by Fedora guests, will get configured under guest's `/var/cache/dnf`. It will
+also [make sure](lib/vagrant-cachier/bucket/dnf.rb#L20) that `keepcache` is set to
+`1` on guest's `/etc/dnf/dnf.conf`.
+
+To manually enable it:
+
+```ruby
+Vagrant.configure("2") do |config|
+  config.vm.box = 'some-fedora-box'
+  config.cache.enable :dnf
+end
+```
+
+### :warning: Notice about Windows hosts :warning:
+
+In case this bucket is enabled and a Windows host is in use, you might see an
+ugly stacktrace as described on [this comment](https://github.com/fgrehm/vagrant-cachier/issues/117#issuecomment-50548393)
+if some DNF repository is not available during provisioning.

docs/template.html

@@ -89,6 +89,7 @@
                   <li><a tabindex="-1" href="buckets/chef">Chef</a></li>
                   <li><a tabindex="-1" href="buckets/chef_rubygems">Chef Gems</a></li>
                   <li><a tabindex="-1" href="buckets/composer">Composer</a></li>
+                  <li><a tabindex="-1" href="buckets/dnf">DNF</a></li>
                   <li><a tabindex="-1" href="buckets/bower">Bower</a></li>
                   <li><a tabindex="-1" href="buckets/pacman">Pacman</a></li>
                   <li><a tabindex="-1" href="buckets/npm">npm</a></li>

lib/vagrant-cachier/bucket.rb

@@ -93,6 +93,7 @@ require_relative "bucket/gem"
 require_relative "bucket/chef_gem"
 require_relative "bucket/pacman"
 require_relative "bucket/yum"
+require_relative "bucket/dnf"
 require_relative "bucket/rvm"
 require_relative "bucket/apt_cacher"
 require_relative "bucket/apt_lists"

lib/vagrant-cachier/bucket/dnf.rb

@@ -0,0 +1,27 @@
+module VagrantPlugins
+  module Cachier
+    class Bucket
+      class Dnf < Bucket
+        def self.capability
+          :dnf_cache_dir
+        end
+
+        def install
+          if guest.capability?(:dnf_cache_dir)
+            if guest_path = guest.capability(:dnf_cache_dir)
+              return if @env[:cache_dirs].include?(guest_path)
+
+              # Ensure caching is enabled
+              comm.sudo("sed -i '/keepcache=/d' /etc/dnf/dnf.conf")
+              comm.sudo("sed -i '/^[main]/a keepcache=1' /etc/dnf/dnf.conf")
+
+              symlink(guest_path)
+            end
+          else
+            @env[:ui].info I18n.t('vagrant_cachier.skipping_bucket', bucket: 'DNF')
+          end
+        end
+      end
+    end
+  end
+end

lib/vagrant-cachier/bucket/yum.rb

@@ -8,13 +8,14 @@ module VagrantPlugins
 
         def install
           if guest.capability?(:yum_cache_dir)
-            guest_path = guest.capability(:yum_cache_dir)
+            if guest_path = guest.capability(:yum_cache_dir)
               return if @env[:cache_dirs].include?(guest_path)
 
               # Ensure caching is enabled
               comm.sudo("sed -i 's/keepcache=0/keepcache=1/g' /etc/yum.conf")
 
               symlink(guest_path)
+            end
           else
             @env[:ui].info I18n.t('vagrant_cachier.skipping_bucket', bucket: 'Yum')
           end

lib/vagrant-cachier/cap/redhat/dnf_cache_dir.rb

@@ -0,0 +1,18 @@
+module VagrantPlugins
+  module Cachier
+    module Cap
+      module RedHat
+        module DnfCacheDir
+          def self.dnf_cache_dir(machine)
+            dnf_cache_dir = nil
+            machine.communicate.tap do |comm|
+              return unless comm.test('which dnf')
+              dnf_cache_dir = '/var/cache/dnf'
+            end
+            return dnf_cache_dir
+          end
+        end
+      end
+    end
+  end
+end

lib/vagrant-cachier/cap/redhat/yum_cache_dir.rb

@@ -4,7 +4,13 @@ module VagrantPlugins
       module RedHat
         module YumCacheDir
           def self.yum_cache_dir(machine)
-            '/var/cache/yum'
+            yum_cache_dir = nil
+            machine.communicate.tap do |comm|
+              # In case yum is only forwarding to dnf do not cache
+              return unless not comm.test('yum --version 2>&1 | grep /usr/bin/dnf')
+              yum_cache_dir = '/var/cache/yum'
+            end
+            return yum_cache_dir
           end
         end
       end

lib/vagrant-cachier/capabilities.rb

@@ -61,6 +61,11 @@ module VagrantPlugins
         Cap::RedHat::YumCacheDir
       end
 
+      guest_capability 'redhat', 'dnf_cache_dir' do
+        require_relative 'cap/redhat/dnf_cache_dir'
+        Cap::RedHat::DnfCacheDir
+      end
+
       guest_capability 'suse', 'yum_cache_dir' do
         # Disable Yum on suse guests
       end