From 1d8b10d00f0c242bc5ce9540737af3d3f24a05c0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Mon, 11 Feb 2019 22:51:08 +0100
Subject: [PATCH] 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 0e3ce37e26..289537dedf 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.