Stop chdir when finding packlist. Absolutify %INC path in case there's a relative...

When there's a relative path in @INC (e.g. with -Mlib=./local/lib/perl5),
FatPacker died with `Can't open local/lib/perl5/.../.packlist` even if the
file exists, because of File::Find's chdir, and $File::Find::name is yet
relative.

This patch adds 'no_chdir' option to File::Find to stop chdir'ing to
the directories, and then expand the %INC entries to fullpath with
Cwd::abs_path, so that it will hopefully match with what you have in
.packlist content.

Reproduce:

  cpanm -l local Plack
  perl -Mlib=local/lib/perl5 -S fatpack packlists-for Plack.pm

diff --git a/lib/App/FatPacker.pm b/lib/App/FatPacker.pm
index 2ae6f3a..c35aa25 100644 (file)
--- a/lib/App/FatPacker.pm
+++ b/lib/App/FatPacker.pm
@@ -147,13 +147,14 @@ sub packlists_containing {
   }
   my @search = grep -d $_, map catdir($_, 'auto'), @INC;
   my %pack_rev;
-  my $cwd = cwd;
-  find(sub {
-    return unless $_ eq '.packlist' && -f $_;
-    $pack_rev{$_} = $File::Find::name for lines_of $File::Find::name;
+  find({
+    no_chdir => 1,
+    wanted => sub {
+      return unless /[\\\/]\.packlist$/ && -f $_;
+      $pack_rev{$_} = $File::Find::name for lines_of $File::Find::name;
+    },
   }, @search);
-  chdir($cwd) or die "Couldn't chdir back to ${cwd} after find: $!";
-  my %found; @found{map +($pack_rev{$INC{$_}}||()), @targets} = ();
+  my %found; @found{map +($pack_rev{Cwd::abs_path($INC{$_})}||()), @targets} = ();
   sort keys %found;
 }