Move post-deploy trigger to core-post-deploy. Refs #2367

This avoids issues where community plugins may break core commands because of issues in the command output.

plugins/named-containers/core-post-deploy

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
+
+named_containers_core_post_deploy() {
+  declare desc="names deployed app container is consistent manner"
+  local trigger="named_containers_core_post_deploy"
+  local APP="$1"; local APP_ROOT="$DOKKU_ROOT/$APP"
+  local container
+
+  shopt -s nullglob
+  for container in $APP_ROOT/CONTAINER.*; do
+    local DYNO=$(echo "$container" | sed -r 's/.*CONTAINER\.(.*)/\1/') || true
+    local NAME="$APP.$DYNO"
+    local CURRENT_CONTAINER_ID="$(< "$container")"
+    local PREVIOUS_CIDS=$(docker ps -a -q -f name="^.?$NAME\$" | xargs) || true
+    if [[ -n $PREVIOUS_CIDS ]]; then
+      dokku_log_info1_quiet "Found previous container(s) ($PREVIOUS_CIDS) named $NAME"
+      # in case $PREVIOUS_CIDS has more than one entry
+      local cid
+      for cid in $PREVIOUS_CIDS; do
+        local PREVIOUS_CONTAINER_STATUS=$(docker inspect -f '{{.State.Status}}' "$cid" || echo "dead")
+        # dead containers cannot be renamed
+        if [[ "$PREVIOUS_CONTAINER_STATUS" != "dead" ]]; then
+          local CONTAINER_DATE_NAME="$NAME.$(date +%s)"
+          dokku_log_info2_quiet "renaming container ($cid) ${NAME} to $CONTAINER_DATE_NAME"
+          docker rename "$NAME" "$CONTAINER_DATE_NAME" > /dev/null
+        fi
+      done
+    fi
+    local ID=$(cat "$container")
+    local CURRENT_NAME=$(docker inspect -f '{{.Name}}' "$ID" | tr -d /)
+    if [[ -n "$CURRENT_NAME" ]]; then
+      dokku_log_info2_quiet "renaming container (${ID:0:12}) $CURRENT_NAME to $NAME"
+      docker rename "$CURRENT_NAME" "$NAME" > /dev/null
+    fi
+  done
+  shopt -u nullglob
+}
+
+named_containers_core_post_deploy "$@"