basic entrypoint, automatic registration of runner works

Dockerfile

@@ -38,10 +38,11 @@ LABEL maintainer="contact@forgejo.org" \
 
 ENV HOME=/data
 
-USER 1000:1000
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
 
 WORKDIR /data
 
 VOLUME ["/data"]
 
-CMD ["/bin/forgejo-runner"]
+ENTRYPOINT ["/entrypoint.sh"]

entrypoint.sh

@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+
+set -e
+
+## Initial setup
+if [[ ! -d /data ]]; then
+  mkdir -p /data
+fi
+cd /data
+
+if [[ -z "${RUNNER_FILE}" ]]; then
+  RUNNER_FILE="/data/.runner"
+fi
+
+if [[ ! -f "${RUNNER_FILE}" ]]; then
+  touch "${RUNNER_FILE}"
+fi
+
+if [[ -z "${CONFIG_FILE}" ]]; then
+  CONFIG_FILE="/data/config.yml"
+fi
+CONFIG_ARG="--config ${CONFIG_FILE}"
+
+if [[ ! -f "${CONFIG_FILE}" ]]; then
+  forgejo-runner generate-config > ${CONFIG_FILE}
+fi
+
+EXTRA_ARGS=""
+if [[ ! -z "${RUNNER_LABELS}" ]]; then
+  EXTRA_ARGS="${EXTRA_ARGS} --labels ${RUNNER_LABELS}"
+fi
+
+# For simplicity sake, I am not using the same ENV variable names as the original script
+
+if [[ -z "${RUNNER_FILE}" ]]; then
+  RUNNER_FILE=".runner"
+fi
+sed -i "/^  file:/c\  file: ${RUNNER_FILE}" ${CONFIG_FILE}
+
+if [[ ! -s "${RUNNER_FILE}" ]]; then
+  try=$((try + 1))
+  success=0
+  if [[ -z "${RUNNER_TOKEN}" ]]; then
+    echo "RUNNER_TOKEN is not set"
+    exit 1
+  fi
+
+  if [[ -z "${FORGEJO_URL}" ]]; then
+    echo "FORGEJO_URL is not set"
+    echo "Defaulting to http://forgejo:8080"
+  fi
+
+
+  # The point of this loop is to make it simple, when running both forgejo-runner and gitea in docker,
+  # for the forgejo-runner to wait a moment for gitea to become available before erroring out.  Within
+  # the context of a single docker-compose, something similar could be done via healthchecks, but
+  # this is more flexible.
+  while [[ $success -eq 0 ]] && [[ $try -lt ${MAX_REG_ATTEMPTS:-10} ]]; do
+    forgejo-runner register \
+      --instance "${FORGEJO_URL:-http://forgejo:8080}" \
+      --token "${RUNNER_TOKEN}" \
+      --name "${RUNNER_NAME:-$(hostname)}" \
+      ${CONFIG_ARG} ${EXTRA_ARGS} --no-interactive 2>&1 | tee /tmp/reg.log
+
+    cat /tmp/reg.log | grep 'Runner registered successfully' >/dev/null
+    if [[ $? -eq 0 ]]; then
+      echo "SUCCESS"
+      success=1
+    else
+      echo "Waiting to retry ..."
+      sleep 5
+    fi
+  done
+fi
+# Prevent reading the token from the forgejo-runner process
+unset RUNNER_TOKEN
+
+forgejo-runner daemon ${CONFIG_ARG}