Generator: split kind supports optional tag-trigger + setup-comment + publish-flag (oleks/ci-scripts#2)

generator/templates/split/PERARCH.yaml.tmpl

@@ -2,8 +2,7 @@
 when:
   - event: push
     branch: main
-  - event: tag
-
+{tag_event_line}
 clone:
   - name: clone
     image: woodpeckerci/plugin-git
@@ -33,7 +32,5 @@ steps:
           pipeline-number: "${{CI_PIPELINE_NUMBER}}"
     commands:
       - echo "▸ arch=$(uname -m)"
-      # nix.conf substituters + {git_host} netrc (to fetch the parity-lib
-      # flake input). Same bootstrap as flake-hub/ci/setup.sh.
-      - sh {setup_script}
-{entrypoint_comment}      - PUBLISH=1 nix run .#{app} -- --publish
+{setup_comment}      - sh {setup_script}
+{entrypoint_comment}      - PUBLISH=1 nix run .#{app}{publish_flag}