chore: add script to update a docker image

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>

diff --git a/scripts/docker-upgrade.sh b/scripts/docker-upgrade.sh
new file mode 100755 (executable)
index 0000000..5ff3550
--- /dev/null
+++ b/scripts/docker-upgrade.sh
@@ -0,0 +1,36 @@
+#!/usr/bin/env sh
+set -eu
+
+DOCKER_IMAGE="freqtradeorg/freqtrade:stable"
+
+echo_timestamped() {
+  command echo "$(date +"%Y-%m-%d %H:%M:%S") - $*"
+}
+
+if ! command -v docker >/dev/null 2>&1; then
+  echo_timestamped "Error: docker not found in PATH"
+  exit 1
+fi
+
+if [ ! -f "docker-compose.yml" ] && [ ! -f "docker-compose.yaml" ]; then
+  echo_timestamped "Error: docker-compose.yml or docker-compose.yaml not found in current directory"
+  exit 1
+fi
+
+echo_timestamped "Info: docker image pull for ${DOCKER_IMAGE}"
+local_digest=$(command docker image inspect --format='{{.Id}}' "$DOCKER_IMAGE" 2>/dev/null || command echo "none")
+if ! command docker image pull --quiet "$DOCKER_IMAGE"; then
+  echo_timestamped "Error: docker image pull failed for ${DOCKER_IMAGE}"
+  exit 1
+fi
+remote_digest=$(command docker image inspect --format='{{.Id}}' "$DOCKER_IMAGE" 2>/dev/null || command echo "none")
+
+if [ "$local_digest" != "$remote_digest" ]; then
+  echo_timestamped "Info: docker image ${DOCKER_IMAGE} was updated ($local_digest -> $remote_digest), wait for reload..."
+  echo_timestamped "Info: restarting docker image ${DOCKER_IMAGE}"
+  command docker compose --progress quiet down
+  command docker compose --progress quiet up -d
+  echo_timestamped "Info: restarted docker image ${DOCKER_IMAGE}"
+else
+  echo_timestamped "Info: docker image ${DOCKER_IMAGE} is up to date"
+fi