Setup default gitlab.yml with possibility to override default url via environment variable.

bin/pkgr_before_precompile.sh

 #!/bin/sh
 
-set -ex
+set -e
 
 for file in config/*.yml.example; do
   cp ${file} config/$(basename ${file} .example)
 done
 
+# Allow to override the Gitlab URL from an environment variable, as this will avoid having to change the configuration file for simple deployments.
+config=$(echo '<% gitlab_url = URI(ENV["GITLAB_URL"] || "http://localhost:80") %>' | cat - config/gitlab.yml)
+echo "$config" > config/gitlab.yml
+sed -i "s/host: localhost/host: <%= gitlab_url.host %>/" config/gitlab.yml
+sed -i "s/port: 80/port: <%= gitlab_url.port %>/" config/gitlab.yml
+sed -i "s/https: false/https: <%= gitlab_url.scheme == 'https' %>/" config/gitlab.yml
+
 # No need for config file. Will be taken care of by REDIS_URL env variable
 rm config/resque.yml