nixos: Add gitlab and gitlab-shell

I had to make several adjustments to make it work with nixos:

* Replace relative config file lookups with ENV variable.
* Modify gitlab-shell to not clear then environment when running
  pre-receive.
* Modify gitlab-shell to write some environment variables into
  the .authorized_keys file to make sure gitlab-shell reads the
  correct config file.
* Log unicorn output to syslog.
  I tried various ways of adding a syslog package but the bundler would
  not pick them up. Please fix in a better way if possible.
* Gitlab-runner program wrapper.
  This is useful to run e.g. backups etc. with the correct
  environment set up.

1 files changed, 109 insertions, 0 deletions

diff --git a/pkgs/applications/version-management/gitlab/remove-hardcoded-locations.patch b/pkgs/applications/version-management/gitlab/remove-hardcoded-locations.patch
new file mode 100644
index 00000000000..f5532bbd67c
--- /dev/null
+++ b/pkgs/applications/version-management/gitlab/remove-hardcoded-locations.patch
@@ -0,0 +1,109 @@
+diff --git a/config/environments/production.rb b/config/environments/production.rb
+index 78bf543..9b37122 100644
+--- a/config/environments/production.rb
++++ b/config/environments/production.rb
+@@ -66,10 +66,10 @@ Gitlab::Application.configure do
+ 
+   config.action_mailer.delivery_method = :sendmail
+   # Defaults to:
+-  # # config.action_mailer.sendmail_settings = {
+-  # #   location: '/usr/sbin/sendmail',
+-  # #   arguments: '-i -t'
+-  # # }
++  config.action_mailer.sendmail_settings = {
++    location: '/var/setuid-wrappers/sendmail',
++    arguments: '-i -t'
++  }
+   config.action_mailer.perform_deliveries = true
+   config.action_mailer.raise_delivery_errors = true
+ 
+diff --git a/config/gitlab.yml.example b/config/gitlab.yml.example
+index e7a8d08..834ecaf 100644
+--- a/config/gitlab.yml.example
++++ b/config/gitlab.yml.example
+@@ -17,8 +17,8 @@ production: &base
+   ## GitLab settings
+   gitlab:
+     ## Web server settings (note: host is the FQDN, do not include http://)
+-    host: localhost
+-    port: 80 # Set to 443 if using HTTPS, see installation.md#using-https for additional HTTPS configuration details
++    host: <%= ENV['GITLAB_HOST'] || 'localhost' %>
++    port: <%= ENV['GITLAB_PORT'] || 80 %>
+     https: false # Set to true if using HTTPS, see installation.md#using-https for additional HTTPS configuration details
+ 
+     # Uncommment this line below if your ssh host is different from HTTP/HTTPS one
+@@ -31,11 +31,11 @@ production: &base
+     # relative_url_root: /gitlab
+ 
+     # Uncomment and customize if you can't use the default user to run GitLab (default: 'git')
+-    # user: git
++    user: gitlab
+ 
+     ## Email settings
+     # Email address used in the "From" field in mails sent by GitLab
+-    email_from: example@example.com
++    email_from: <%= ENV['GITLAB_EMAIL_FROM'] %>
+ 
+     # Email server smtp settings are in [a separate file](initializers/smtp_settings.rb.sample).
+ 
+@@ -230,12 +230,12 @@ production: &base
+   # GitLab Satellites
+   satellites:
+     # Relative paths are relative to Rails.root (default: tmp/repo_satellites/)
+-    path: /home/git/gitlab-satellites/
++    path: <%= ENV['GITLAB_SATELLITES_PATH'] %>
+     timeout: 30
+ 
+   ## Backup settings
+   backup:
+-    path: "tmp/backups"   # Relative paths are relative to Rails.root (default: tmp/backups/)
++    path: <%= ENV['GITLAB_BACKUP_PATH'] %>
+     # keep_time: 604800   # default: 0 (forever) (in seconds)
+     # upload:
+     #   # Fog storage connection settings, see http://fog.io/storage/ .
+@@ -249,11 +249,11 @@ production: &base
+ 
+   ## GitLab Shell settings
+   gitlab_shell:
+-    path: /home/git/gitlab-shell/
++    path: <%= ENV['GITLAB_SHELL_PATH'] %>
+ 
+     # REPOS_PATH MUST NOT BE A SYMLINK!!!
+-    repos_path: /home/git/repositories/
+-    hooks_path: /home/git/gitlab-shell/hooks/
++    repos_path: <%= ENV['GITLAB_REPOSITORIES_PATH'] %>
++    hooks_path: <%= ENV['GITLAB_SHELL_HOOKS_PATH'] %>
+ 
+     # Git over HTTP
+     upload_pack: true
+@@ -266,7 +266,7 @@ production: &base
+   # CAUTION!
+   # Use the default values unless you really know what you are doing
+   git:
+-    bin_path: /usr/bin/git
++    bin_path: git
+     # The next value is the maximum memory size grit can use
+     # Given in number of bytes per git object (e.g. a commit)
+     # This value can be increased if you have very large commits
+@@ -299,7 +299,7 @@ test:
+   gravatar:
+     enabled: true
+   gitlab:
+-    host: localhost
++    host: <%= ENV['GITLAB_HOST'] %>
+     port: 80
+ 
+     # When you run tests we clone and setup gitlab-shell
+diff --git a/lib/gitlab/app_logger.rb b/lib/gitlab/app_logger.rb
+index 8e4717b..abfe2e4 100644
+--- a/lib/gitlab/app_logger.rb
++++ b/lib/gitlab/app_logger.rb
+@@ -1,7 +1,7 @@
+ module Gitlab
+   class AppLogger < Gitlab::Logger
+     def self.file_name
+-      'application.log'
++      ENV["GITLAB_APPLICATION_LOG_PATH"]
+     end
+ 
+     def format_message(severity, timestamp, progname, msg)