Add gitea act runner

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

packages/docker/gitea-act-runner/entrypoint.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env sh
+
+set -o errexit
+set -o nounset
+
+GITEA_RUNNER_NAME="${GITEA_RUNNER_NAME:-main}"
+
+LOG_PIPE="$(mktemp -u)"
+mkfifo "$LOG_PIPE"
+
+(
+  while IFS= read -r line; do
+    if echo "$line" | grep -qiE 'level=(warn|error|fatal)'; then
+      echo "$line" >&2
+    else
+      echo "$line"
+    fi
+  done < "$LOG_PIPE"
+) &
+
+if [ ! -f /var/lib/gitea-act-runner/registration ]; then
+  GITEA_API="${GITEA_INSTANCE_URL%/}/api/v1"
+
+  auth="Authorization: Basic $(echo -n "$GITEA_ADMIN_USERNAME:$GITEA_ADMIN_PASSWORD" | base64 -w 0)"
+
+  runners="$(curl -sf --retry 10 --retry-connrefused -H "$auth" "$GITEA_API/admin/actions/runners")"
+  old_runner="$(echo "$runners" | jq -r ".runners[] | select(.name == \"$GITEA_RUNNER_NAME\") | .id")"
+
+  if [ -n "$old_runner" ]; then
+    curl -sf -X DELETE -H "$auth" "$GITEA_API/admin/actions/runners/$old_runner"
+  fi
+
+  act_runner --config /etc/gitea-act-runner/config.yaml register \
+    --no-interactive \
+    --instance "$GITEA_INSTANCE_URL" \
+    --token "$GITEA_RUNNER_REGISTRATION_TOKEN" \
+    --name "$GITEA_RUNNER_NAME" \
+    --labels "${GITEA_RUNNER_LABELS:-}" > "$LOG_PIPE" 2>&1
+fi
+
+exec act_runner --config /etc/gitea-act-runner/config.yaml daemon "$@" > "$LOG_PIPE" 2>&1