04/06: git: Add an exception printer for 'git-error'.

[guix-commits]

civodul pushed a commit to branch master
in repository guix.

commit 1d8b10d00f0c242bc5ce9540737af3d3f24a05c0
Author: Ludovic Courtès <address@hidden>
Date:   Mon Feb 11 22:51:08 2019 +0100

    git: Add an exception printer for 'git-error'.
    
    * guix/git.scm (print-git-error): New procedure.
    <top level>: Call 'set-exception-printer!'.
---
 guix/git.scm | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/guix/git.scm b/guix/git.scm
index 0e3ce37..289537d 100644
--- a/guix/git.scm
+++ b/guix/git.scm
@@ -300,6 +300,14 @@ Log progress and checkout info to LOG-PORT."
                           #:select? (negate dot-git?))
             commit)))
 
+(define (print-git-error port key args default-printer)
+  (match args
+    (((? git-error? error) . _)
+     (format port (G_ "Git error: ~a~%")
+             (git-error-message error)))))
+
+(set-exception-printer! 'git-error print-git-error)
+
 
 ;;;
 ;;; Checkouts.