From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 19 Aug 2018 16:47:39 +0000 (+0100)
Subject: git-debrebase: get_tree: Support '' for nonexistent objects
X-Git-Tag: archive/debian/6.7~48
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=dgit.git;a=commitdiff_plain;h=e2a5e5241eb7e838c6d483800bde4bdb67af3949;hp=d806e898308acbaca5685a4dec6688c0164ea642

git-debrebase: get_tree: Support '' for nonexistent objects

This is going to be convenient in a moment.

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

diff --git a/git-debrebase b/git-debrebase
index 8fa5adb7..57bfa982 100755
--- a/git-debrebase
+++ b/git-debrebase
@@ -187,8 +187,12 @@ sub get_tree ($) {
     # tree object name => ([ $name, $info ], ...)
     # where $name is the sort key, ie has / at end for subtrees
     # $info is the LHS from git-ls-tree (<mode> <type> <hash>)
-    # will crash if $x does not exist, so don't do that
+    # will crash if $x does not exist, so don't do that;
+    # instead pass '' to get ().
     my ($x) = @_;
+
+    return () if !length $x;
+
     our (@get_tree_memo, %get_tree_memo);
     my $memo = $get_tree_memo{$x};
     return @$memo if $memo;