Add core storage plugin to manage docker bind mounts [ci skip]

plugins/storage/commands

@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+[[ " storage storage:list storage:mount storage:unmount storage:help help " == *" $1 "* ]] || exit "$DOKKU_NOT_IMPLEMENTED_EXIT"
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
+source "$PLUGIN_CORE_AVAILABLE_PATH/storage/functions"
+source "$PLUGIN_CORE_AVAILABLE_PATH/docker-options/functions"
+
+case "$1" in
+  storage:list)
+    # List all bound mounts
+    passed_phases="deploy"
+    [[ ! $2 ]] && dokku_log_fail "storage:list requires an app to list."
+    verify_app_name "$2" && APP="$2"
+    echo "$APP volume bind-mounts:"
+    get_bind_mounts "$(get_phase_file_path "$passed_phases")"
+    ;;
+
+  storage:mount)
+    # Add bind-mount, redeploy app if running
+    passed_phases=(deploy run)
+    [[ -z $3 || $4 ]] && dokku_log_fail "storage:mount requires an app and a two paths devided by colon."
+    verify_app_name "$2" && APP="$2"
+    verify_paths "$3" && MOUNT_PATH="$3"
+    check_if_path_exists "$MOUNT_PATH" "$(get_phase_file_path "${passed_phases[@]}")" && dokku_log_fail "Mount path already exists."
+    add_passed_docker_option passed_phases[@] "-v $MOUNT_PATH"
+    ;;
+
+  storage:unmount)
+    # Remove bind-mount, restart app if running
+    passed_phases=(deploy run)
+    [[ -z $3 || $4 ]] && dokku_log_fail "storage:unmount requires an app and a two paths devided by colon."
+    verify_app_name "$2" && APP="$2"
+    verify_paths "$3" && MOUNT_PATH="$3"
+    check_if_path_exists "$MOUNT_PATH" "$(get_phase_file_path "${passed_phases[@]}")" || dokku_log_fail "Mount path does not exist."
+    remove_passed_docker_option passed_phases[@] "-v $MOUNT_PATH"
+    ;;
+
+  help | storage:help)
+    cat<<EOF
+    storage:list <app>, List bind mounts for app's container(s) (host:container)
+    storage:mount <app> <host-dir:container-dir>, Create a new bind mount
+    storage:unmount <app> <host-dir:container-dir>, Remove an existing bind mount
+EOF
+    ;;
+
+  *)
+    exit "$DOKKU_NOT_IMPLEMENTED_EXIT"
+    ;;
+
+esac