Vendor the external cookbooks

Knife-Zero doesn't include Berkshelf support, so vendoring everything in
the repo is convenient again

cookbooks/java/resources/alternatives.rb

@@ -0,0 +1,89 @@
+#
+# Cookbook:: java
+# Provider:: alternatives
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+property :java_location, String
+property :bin_cmds, Array
+property :default, [true, false], default: true
+property :priority, Integer, default: 1061
+property :reset_alternatives, [true, false], default: true
+
+action :set do
+  if new_resource.bin_cmds
+    new_resource.bin_cmds.each do |cmd|
+      bin_path = "/usr/bin/#{cmd}"
+      alt_path = "#{new_resource.java_location}/bin/#{cmd}"
+      priority = new_resource.priority
+
+      unless ::File.exist?(alt_path)
+        Chef::Log.debug "Skipping setting alternative for #{cmd}. Command #{alt_path} does not exist."
+        next
+      end
+
+      alternative_exists_same_priority = shell_out("#{alternatives_cmd} --display #{cmd} | grep #{alt_path} | grep 'priority #{priority}$'").exitstatus == 0
+      alternative_exists = shell_out("#{alternatives_cmd} --display #{cmd} | grep #{alt_path}").exitstatus == 0
+      # remove alternative if priority is changed and install it with new priority
+      if alternative_exists && !alternative_exists_same_priority
+        converge_by("Removing alternative for #{cmd} with old priority") do
+          Chef::Log.debug "Removing alternative for #{cmd} with old priority"
+          remove_cmd = shell_out("#{alternatives_cmd} --remove #{cmd} #{alt_path}")
+          alternative_exists = false
+          unless remove_cmd.exitstatus == 0
+            Chef::Application.fatal!(%( remove alternative failed ))
+          end
+        end
+      end
+      # install the alternative if needed
+      unless alternative_exists
+        converge_by("Add alternative for #{cmd}") do
+          Chef::Log.debug "Adding alternative for #{cmd}"
+          if new_resource.reset_alternatives
+            shell_out("rm /var/lib/alternatives/#{cmd}")
+          end
+          install_cmd = shell_out("#{alternatives_cmd} --install #{bin_path} #{cmd} #{alt_path} #{priority}")
+          unless install_cmd.exitstatus == 0
+            Chef::Application.fatal!(%( install alternative failed ))
+          end
+        end
+      end
+
+      # set the alternative if default
+      next unless new_resource.default
+      alternative_is_set = shell_out("#{alternatives_cmd} --display #{cmd} | grep \"link currently points to #{alt_path}\"").exitstatus == 0
+      next if alternative_is_set
+      converge_by("Set alternative for #{cmd}") do
+        Chef::Log.debug "Setting alternative for #{cmd}"
+        set_cmd = shell_out("#{alternatives_cmd} --set #{cmd} #{alt_path}")
+        unless set_cmd.exitstatus == 0
+          Chef::Application.fatal!(%( set alternative failed ))
+        end
+      end
+    end
+  end
+end
+
+action :unset do
+  new_resource.bin_cmds.each do |cmd|
+    converge_by("Remove alternative for #{cmd}") do
+      shell_out("#{alternatives_cmd} --remove #{cmd} #{new_resource.java_location}/bin/#{cmd}")
+    end
+  end
+end
+
+action_class do
+  def alternatives_cmd
+    platform_family?('rhel', 'fedora', 'amazon') ? 'alternatives' : 'update-alternatives'
+  end
+end