Merge pull request #140 from dokku/disable-pull

feat: use custom env var to disable pull actions

README.md

@@ -267,3 +267,9 @@ custom certificate by overwriting the `server.crt` and `server.key` files in
 `/var/lib/dokku/services/postgres/<DB_NAME>/data`.
 The `server.key` must be chmoded to 600 and must be owned by the postgres user
 or root.
+
+## Disabling `docker pull` calls
+
+If you wish to disable the `docker pull` calls that the plugin triggers, you may set the `POSTGRES_DISABLE_PULL` environment variable to `true`. Once disabled, you will need to pull the service image you wish to deploy as shown in the `stderr` output.
+
+Please ensure the proper images are in place when `docker pull` is disabled.

functions

@@ -30,6 +30,12 @@ service_create() {
   service_parse_args "${@:2}"
 
   if ! docker images | grep -e "^$PLUGIN_IMAGE " | grep -q " $PLUGIN_IMAGE_VERSION " ; then
+    if [[ "$POSTGRES_DISABLE_PULL" == "true" ]]; then
+      dokku_log_warn "POSTGRES_DISABLE_PULL environment variable detected. Not running pull command." 1>&2
+      dokku_log_warn "   docker pull ${IMAGE}" 1>&2
+      dokku_log_warn "$PLUGIN_SERVICE service creation failed"
+      exit 1
+    fi
     docker pull "$PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION" || dokku_log_fail "$PLUGIN_SERVICE image $PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION pull failed"
   fi
 

install

@@ -5,6 +5,11 @@ set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 plugin-install() {
   pull-docker-image() {
     declare IMAGE="$1"
+    if [[ "$POSTGRES_DISABLE_PULL" == "true" ]]; then
+      echo " !     POSTGRES_DISABLE_PULL environment variable detected. Not running pull command." 1>&2
+      echo " !        docker pull ${IMAGE}" 1>&2
+      return
+    fi
     if [[ "$(docker images -q "${IMAGE}" 2> /dev/null)" == "" ]]; then
       docker pull "${IMAGE}"
     fi