GitLab now requires git 2.7.4, which isn't in some distro repositories

Build from source on platforms known to be too old, except for RHEL 7
where we can use the End Point repository.

Strangely we were depending on the git cookbook already but we weren't
using it.

Author: chewi

attributes/default.rb

@@ -112,6 +112,16 @@
   )
 end
 
+# How to install git? RHEL 7 can use End Point.
+default['gitlab']['git_recipe'] = value_for_platform(
+  %w( redhat centos scientific oracle ) => { '< 7' => 'source' },
+  'amazon' => { '>= 0' => 'source' },
+  'fedora' => { '< 24' => 'source' },
+  'debian' => { '< 9' => 'source' },
+  'ubuntu' => { '< 16.04' => 'source' },
+  'default' => 'package'
+)
+
 default['gitlab']['trust_local_sshkeys'] = 'yes'
 
 default['gitlab']['https'] = false

recipes/default.rb

@@ -25,6 +25,9 @@
   include_recipe 'yum-epel'
 end
 
+# Install new enough git version
+include_recipe 'gitlab::git'
+
 # Setup the database connection
 case node['gitlab']['database']['type']
 when 'mysql'

recipes/git.rb

@@ -0,0 +1,31 @@
+#
+# Cookbook Name:: gitlab
+# Recipe:: git
+#
+# Copyright 2016, Yakara Ltd
+#
+# 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.
+#
+
+git_recipe = node['gitlab']['git_recipe']
+
+yum_repository 'endpoint-git' do
+  description 'git from End Point repository'
+  includepkgs 'git git-core* perl-Git'
+  el = node['platform_version'].to_i
+  baseurl "https://packages.endpoint.com/rhel/#{el}/os/$basearch/"
+  gpgkey "https://packages.endpoint.com/endpoint-rpmsign-#{el}.pub"
+  only_if { git_recipe == 'package' && platform_family?('rhel') }
+end
+
+include_recipe "git::#{git_recipe}"