Automatically set package source ci template

.env.example

@@ -7,5 +7,8 @@ GITLAB_TOKEN=
 GITLAB_DOMAIN=gitlab.archlinux.org
 GITLAB_PACKAGES_GROUP=packaging-buildbtw-dev/packages
 RUN_BUILDS_ON_GITLAB=false
+# Update package source CI settings to use the specified .gitlab-ci.yml file.
+# https://gitlab.archlinux.org/help/ci/pipelines/settings.md#specify-a-custom-cicd-configuration-file
+GITLAB_PACKAGES_CI_CONFIG=.gitlab-ci.yml@packaging-buildbtw-dev/gitlab-ci-templates
 
 DATABASE_URL="sqlite:buildbtw_server.sqlite"
\ No newline at end of file

src/bin/server/args.rs

@@ -50,8 +50,12 @@ pub struct Gitlab {
     /// Requires gitlab token to be specified.
     // TODO: make this an enum BuildDispatch {Gitlab, Local} and move it
     // out of the `Gitlab` struct
-    #[arg(long, env, required = false)]
+    #[arg(long, env, required = false, default_value = "false")]
     pub run_builds_on_gitlab: bool,
+    /// Update package source CI settings to use the default .gitlab-ci.yml file.
+    /// See https://gitlab.archlinux.org/help/ci/pipelines/settings.md#specify-a-custom-cicd-configuration-file
+    #[arg(long, env, required = false, default_value = "false")]
+    pub gitlab_packages_ci_config: bool,
 }
 
 #[derive(Debug, Clone, Subcommand)]