feat: docker env vars for ephemeral and once (#685)

* GITEA_RUNNER_EPHEMERAL=1
* GITEA_RUNNER_ONCE=1

Related https://gitea.com/gitea/act_runner/issues/684

Reviewed-on: https://gitea.com/gitea/act_runner/pulls/685
Reviewed-by: techknowlogick <[email protected]>
Co-authored-by: Christopher Homberger <[email protected]>
Co-committed-by: Christopher Homberger <[email protected]>

Author: ChristopherHX

scripts/run.sh

@@ -16,6 +16,13 @@ EXTRA_ARGS=""
 if [[ ! -z "${GITEA_RUNNER_LABELS}" ]]; then
   EXTRA_ARGS="${EXTRA_ARGS} --labels ${GITEA_RUNNER_LABELS}"
 fi
+if [[ ! -z "${GITEA_RUNNER_EPHEMERAL}" ]]; then
+  EXTRA_ARGS="${EXTRA_ARGS} --ephemeral"
+fi
+RUN_ARGS=""
+if [[ ! -z "${GITEA_RUNNER_ONCE}" ]]; then
+  RUN_ARGS="${RUN_ARGS} --once"
+fi
 
 # In case no token is set, it's possible to read the token from a file, i.e. a Docker Secret
 if [[ -z "${GITEA_RUNNER_REGISTRATION_TOKEN}" ]] && [[ -f "${GITEA_RUNNER_REGISTRATION_TOKEN_FILE}" ]]; then
@@ -54,4 +61,4 @@ fi
 unset GITEA_RUNNER_REGISTRATION_TOKEN
 unset GITEA_RUNNER_REGISTRATION_TOKEN_FILE
 
-exec act_runner daemon ${CONFIG_ARG}
+exec act_runner daemon ${CONFIG_ARG} ${RUN_ARGS}