dokku/plugins/plugin/subcommands/update

#!/usr/bin/env bash
set -eo pipefail
[[ $DOKKU_TRACE ]] && set -x
source "$PLUGIN_AVAILABLE_PATH/plugin/internal-functions"

cmd-plugin-update() {
  declare desc="updates plugin to optional committish and calls update plugin trigger via command line"
  declare cmd="plugin:update"
  [[ "$1" == "$cmd" ]] && shift 1
  declare PLUGIN="$1" PLUGIN_COMMITTISH="$2"

  if [[ -n "$PLUGIN" ]]; then
    if ! fn-is-valid-plugin "$PLUGIN"; then
      dokku_log_fail "Invalid plugin name specified"
    fi

    if ! fn-plugin-enabled "$PLUGIN"; then
      dokku_log_fail "Specified plugin not enabled or installed"
    fi

    if fn-is-core-plugin "$PLUGIN"; then
      dokku_log_fail "Cannot trigger plugin:update against core plugin, please update Dokku instead"
    fi

    plugn update "$PLUGIN" "$PLUGIN_COMMITTISH"
  else
    pushd "$PLUGIN_ENABLED_PATH" >/dev/null
    for PLUGIN in *; do
      if [[ -d "${PLUGIN}" ]]; then
        if fn-is-core-plugin "${PLUGIN}"; then
          continue
        fi

        plugn update "$PLUGIN"
      fi
    done
    popd &>/dev/null || pushd "/tmp" >/dev/null
  fi

  plugn trigger update
  plugin_prime_bash_completion
}

cmd-plugin-update "$@"