From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Thu, 11 Oct 2018 00:18:52 +0000 (+0100)
Subject: changedir_git_toplevel: Special error for not in git tree
X-Git-Tag: archive/debian/8.0~40
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=dgit.git;a=commitdiff_plain;h=67a5c76a1ca22f119a6b316faddb0cb3767060b7

changedir_git_toplevel: Special error for not in git tree

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm
index bfe2ab9b..458017df 100644
--- a/Debian/Dgit.pm
+++ b/Debian/Dgit.pm
@@ -502,6 +502,10 @@ sub git_rev_parse ($) {
 
 sub changedir_git_toplevel () {
     my $toplevel = cmdoutput qw(git rev-parse --show-toplevel);
+    length $toplevel or fail __ <<END;
+not in a git working tree?
+(git rev-parse --show-toplevel produced no output)
+END
     chdir $toplevel or fail f_ "chdir toplevel %s: %s\n", $toplevel, $!;
 }