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-rw-r--r--doc/guix.texi6
-rw-r--r--guix-build.in15
2 files changed, 18 insertions, 3 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index b8ab94f5ad..21f6d87b3a 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -532,6 +532,12 @@ value @code{0} means to use as many CPU cores as available.
@itemx -r @var{file}
Make @var{file} a symlink to the result, and register it as a garbage
collector root.
+
+@item --verbosity=@var{level}
+Use the given verbosity level. @var{level} must be an integer between 0
+and 5; higher means more verbose output. Setting a level of 4 or more
+may be helpful when debugging setup issues with the build daemon.
+
@end table
Behind the scenes, @command{guix-build} is essentially an interface to
diff --git a/guix-build.in b/guix-build.in
index a3f6f5766b..5136a2a5e4 100644
--- a/guix-build.in
+++ b/guix-build.in
@@ -71,7 +71,8 @@ When SOURCE? is true, return the derivations of the package sources."
(define %default-options
;; Alist of default option values.
`((system . ,(%current-system))
- (substitutes? . #t)))
+ (substitutes? . #t)
+ (verbosity . 0)))
(define (show-help)
(display (_ "Usage: guix-build [OPTION]... PACKAGE-OR-DERIVATION...
@@ -95,6 +96,8 @@ Build the given PACKAGE-OR-DERIVATION and return their output paths.\n"))
(display (_ "
-r, --root=FILE make FILE a symlink to the result, and register it
as a garbage collector root"))
+ (display (_ "
+ --verbosity=LEVEL use the given verbosity LEVEL"))
(newline)
(display (_ "
-h, --help display this help and exit"))
@@ -147,7 +150,12 @@ Report bugs to: ~a.~%") "@PACKAGE_BUGREPORT@"))
(alist-delete 'substitutes? result))))
(option '(#\r "root") #t #f
(lambda (opt name arg result)
- (alist-cons 'gc-root arg result)))))
+ (alist-cons 'gc-root arg result)))
+ (option '("verbosity") #t #f
+ (lambda (opt name arg result)
+ (let ((level (string->number arg)))
+ (alist-cons 'verbosity level
+ (alist-delete 'verbosity result)))))))
;;;
@@ -244,7 +252,8 @@ Report bugs to: ~a.~%") "@PACKAGE_BUGREPORT@"))
(set-build-options (%store)
#:keep-failed? (assoc-ref opts 'keep-failed?)
#:build-cores (or (assoc-ref opts 'cores) 0)
- #:use-substitutes? (assoc-ref opts 'substitutes?))
+ #:use-substitutes? (assoc-ref opts 'substitutes?)
+ #:verbosity (assoc-ref opts 'verbosity))
(if (assoc-ref opts 'derivations-only?)
(format #t "~{~a~%~}" drv)