Re: Guix build output insufficient

[Ludovic Courtès]

Hello,

Ricardo Wurmus <address@hidden> skribis:

>> On latest
>>
>>   ./pre-inst guix package -i something
>>
>> The new color scheme is nice for output. But I miss the old build
>> logs. How do I get them back?
>
> The build logs are stored by the daemon.  You can get their location by
> doing
>
>     guix build --log-file something

What about immediately giving the file name of the log, as with the
patch attached?  Several people have already mentioned not knowing about
‘guix build --log-file’ so this would probably be helpful.

Thanks for bringing colors and minimalism to the tools’ output!  :-)

Ludo’.

diff --git a/guix/ui.scm b/guix/ui.scm
index 1bbd37c25..98425eaff 100644
--- a/guix/ui.scm
+++ b/guix/ui.scm
@@ -1708,12 +1708,15 @@ phase announcements and replaces any other output with 
a spinner."
                         (string-append
                          (proc "Building " 'BLUE 'BOLD)
                          (match:substring m 2) "\n")))
-                    ("^(@ build-failed) (.*) (.*)"
+                    ("^(@ build-failed) ([[:graph:]]+*) (.*)"
                      #:transform
                      ,(lambda (m)
-                        (string-append
-                         (proc "Build failed: " 'RED 'BOLD)
-                         (match:substring m 2) "\n")))
+                        (let ((drv (match:substring m 2)))
+                          (string-append
+                           (proc "Build failed: " 'RED 'BOLD)
+                           drv "\n")
+                          (info (G_ "build log available at '~a'~%")
+                                (log-file #f (pk 'drv drv)))))) ;XXX: 1st arg
                     ("^(@ build-succeeded) (.*) (.*)"
                      #:transform
                      ,(lambda (m)