git-branch-list(drop): Support multiple branches with similar names

Previously if you had multiple branches with similar names, they could
all be deleted when deleting a single one.

For example:

    $ git branch-list
      1 a-branch-with-suffix
      2 a-branch
    $ git branch-list drop 2
    $ git branch-list
    $

Change the regex used to match branches to drop to match the whole line,
so we don't accidentally delete a branch when it has a positive partial
match.

2 files changed, 38 insertions, 1 deletions

diff --git a/git-branch-list b/git-branch-list
index 0c6a74a..cde44f2 100755
--- a/git-branch-list
+++ b/git-branch-list
@@ -78,7 +78,7 @@ function drop_branch () {
 	done
 
 	for branch in "${branch_names[@]}"; do
-		sed -i '.bak' "/$branch/d" "$DATABASE"
+		sed -i '.bak' "/^$branch$/d" "$DATABASE"
 	done
 
 	rm "${DATABASE}.bak"
diff --git a/t/103-drop-does-not-drop-other-branches-with-similar-names.t b/t/103-drop-does-not-drop-other-branches-with-similar-names.t
new file mode 100644
index 0000000..05360cb
--- /dev/null
+++ b/t/103-drop-does-not-drop-other-branches-with-similar-names.t
@@ -0,0 +1,37 @@
+#!/usr/bin/env perl -w
+
+use strict;
+
+use Test::More;
+
+use Bin qw($BIN);
+
+chdir 't-git-repo' or die $!;
+
+system('git checkout -b first-similar-name');
+ok !$?;
+
+system("$BIN save");
+ok !$?;
+
+system('git checkout -b first');
+ok !$?;
+
+system("$BIN save");
+ok !$?;
+
+system("$BIN drop");
+ok !$?;
+
+my $branch_list = qx($BIN);
+is $branch_list, '     1	first-similar-name
+';
+
+
+# Teardown
+system('git checkout master');
+system('git branch -d first first-similar-name');
+system("$BIN clear");
+
+
+done_testing;