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scripts: Commands warn when passed zero arguments.

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This is a followup to 3f8326237d.

* guix/scripts/archive.scm (export-from-store): Warn then FILES is
empty.
* guix/scripts/build.scm (guix-build): Likewise.
* guix/scripts/copy.scm (warn-if-empty): New procedure.
(send-to-remote-host, retrieve-from-remote-host): Call it.
* guix/scripts/edit.scm (guix-edit): Warn when SPECS is empty.
* guix/scripts/environment.scm (guix-environment): Warn when MANIFEST
has zero entries.
* guix/scripts/graph.scm (guix-graph): Warn then ITEMS is empty.
* guix/scripts/package.scm (process-actions): Warn when FILES and TRANS
are both empty.
This commit is contained in:
Ludovic Courtès 2021-05-28 10:53:49 +02:00
parent 7243a8c7ec
commit 681af1fb78
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GPG key ID: 090B11993D9AEBB5
7 changed files with 27 additions and 3 deletions
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5
guix/scripts/graph.scm
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@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2015, 2016, 2017, 2018, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2019 Simon Tournier <zimon.toutoune@gmail.com>
;;;
;;; This file is part of GNU Guix.
@ -593,6 +593,9 @@ Emit a representation of the dependency graph of PACKAGE...\n"))
(read/eval-package-expression exp)))
(_ #f))
opts)))
(when (null? items)
(warning (G_ "no arguments specified; creating an empty graph~%")))
(run-with-store store
;; XXX: Since grafting can trigger unsolicited builds, disable it.
(mlet %store-monad ((_ (set-grafting #f))