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authorLudovic Courtès <ludo@gnu.org>2021-05-28 10:53:49 +0200
committerLudovic Courtès <ludo@gnu.org>2021-05-28 11:36:02 +0200
commit681af1fb78a735b51dc811aed770b2948212c3fc (patch)
tree9c033b89bb1865362b0329c679eb01a677ed9499 /guix/scripts/build.scm
parent7243a8c7ecf1421183d01cbd4631191a861376a4 (diff)
downloadguix-681af1fb78a735b51dc811aed770b2948212c3fc.tar
guix-681af1fb78a735b51dc811aed770b2948212c3fc.tar.gz
scripts: Commands warn when passed zero arguments.
This is a followup to 3f8326237df780404c172ef4127195cc20becd66. * 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.
Diffstat (limited to 'guix/scripts/build.scm')
-rw-r--r--guix/scripts/build.scm3
1 files changed, 3 insertions, 0 deletions
diff --git a/guix/scripts/build.scm b/guix/scripts/build.scm
index 2decdb45ed..f2b8ca135e 100644
--- a/guix/scripts/build.scm
+++ b/guix/scripts/build.scm
@@ -679,6 +679,9 @@ needed."
(_ #f))
opts)))
+ (when (null? items)
+ (warning (G_ "no arguments specified, nothing to build~%")))
+
(cond ((assoc-ref opts 'log-file?)
;; Pass 'show-build-log' the output file names, not the
;; derivation file names, because there can be several