Backport GitHub Enterprise import support from EE

These changes were pulled from GitLab EE to support configuring
an alternative API URL than the default https://api.github.com.
In addition, the `verify_ssl` flag allows users to disable SSL cert
checking.

One modification: add a default `args` option if it does not exist
to avoid breaking existing configurations.

2 files changed, 26 insertions, 0 deletions

diff --git a/config/gitlab.yml.example b/config/gitlab.yml.example
index d9c15f81404..2790f1c8a29 100644
--- a/config/gitlab.yml.example
+++ b/config/gitlab.yml.example
@@ -350,6 +350,8 @@ production: &base
       # - { name: 'github',
       #     app_id: 'YOUR_APP_ID',
       #     app_secret: 'YOUR_APP_SECRET',
+      #     url: "https://github.com/",
+      #     verify_ssl: true,
       #     args: { scope: 'user:email' } }
       # - { name: 'bitbucket',
       #     app_id: 'YOUR_APP_ID',
diff --git a/config/initializers/1_settings.rb b/config/initializers/1_settings.rb
index 10c25044b75..39641655181 100644
--- a/config/initializers/1_settings.rb
+++ b/config/initializers/1_settings.rb
@@ -140,6 +140,30 @@ Settings.omniauth.cas3['session_duration'] ||= 8.hours
 Settings.omniauth['session_tickets'] ||= Settingslogic.new({})
 Settings.omniauth.session_tickets['cas3'] = 'ticket'
 
+# Fill out omniauth-gitlab settings. It is needed for easy set up GHE or GH by just specifying url.
+
+github_default_url = "https://github.com"
+github_settings = Settings.omniauth['providers'].find { |provider| provider["name"] == "github"}
+
+if github_settings
+  # For compatibility with old config files (before 7.8)
+  # where people dont have url in github settings
+  if github_settings['url'].blank?
+    github_settings['url'] = github_default_url
+  end
+
+  github_settings["args"] ||= Settingslogic.new({})
+
+  if github_settings["url"].include?(github_default_url)
+    github_settings["args"]["client_options"] = OmniAuth::Strategies::GitHub.default_options[:client_options]
+  else
+    github_settings["args"]["client_options"] = {
+      "site" =>          File.join(github_settings["url"], "api/v3"),
+      "authorize_url" => File.join(github_settings["url"], "login/oauth/authorize"),
+      "token_url" =>     File.join(github_settings["url"], "login/oauth/access_token")
+    }
+  end
+end
 
 Settings['shared'] ||= Settingslogic.new({})
 Settings.shared['path'] = File.expand_path(Settings.shared['path'] || "shared", Rails.root)