prune: do not prune beyond an optional base directory, and add a test

Previously, prune("wiki/srcdir/sandbox/test.mdwn") could delete srcdir
or even wiki, if they happened to be empty. This is rarely what you
want: there's usually some base directory (destdir, srcdir, transientdir
or another subdirectory of wikistatedir) beyond which you do not want to
delete.

1 files changed, 23 insertions, 0 deletions

diff --git a/t/prune.t b/t/prune.t
new file mode 100755
index 000000000..8c3925e9e
--- /dev/null
+++ b/t/prune.t
@@ -0,0 +1,23 @@
+#!/usr/bin/perl
+use warnings;
+use strict;
+use Test::More tests => 6;
+use File::Path qw(make_path remove_tree);
+
+BEGIN { use_ok("IkiWiki"); }
+BEGIN { use_ok("IkiWiki::Render"); }
+
+%config=IkiWiki::defaultconfig();
+
+remove_tree("t/tmp");
+
+make_path("t/tmp/srcdir/a/b/c");
+make_path("t/tmp/srcdir/d/e/f");
+writefile("a/b/c/d.mdwn", "t/tmp/srcdir", "foo");
+writefile("d/e/f/g.mdwn", "t/tmp/srcdir", "foo");
+IkiWiki::prune("t/tmp/srcdir/d/e/f/g.mdwn");
+ok(-d "t/tmp/srcdir");
+ok(! -e "t/tmp/srcdir/d");
+IkiWiki::prune("t/tmp/srcdir/a/b/c/d.mdwn", "t/tmp/srcdir");
+ok(-d "t/tmp/srcdir");
+ok(! -e "t/tmp/srcdir/a");