Make data actually work

The main moves into a fatpacked file too, this is because 'tell DATA'
can't work during BEGIN blocks, as perl hasn't seen the __DATA__ to
create the filehandle.

I'm not too keen on this, it probably needs something like extracting
the pod from main so that perldoc fatpacked-file works correctly, it
breaks current cpanm as that relies on 'caller' returning false in main,
etc.

diff --git a/lib/App/FatPacker.pm b/lib/App/FatPacker.pm
index dc2ad35..14d4931 100644 (file)
--- a/lib/App/FatPacker.pm
+++ b/lib/App/FatPacker.pm
@@ -186,15 +186,14 @@ sub generate_file_hash_style {
   my $end = stripspace <<'  END_END';
     s/^  //mg for values %fatpacked;
 
-    unshift @INC, sub {
-      if (my $fat = $fatpacked{$_[1]}) {
-        open my $fh, '<', \$fat
-          or die "FatPacker error loading $_[1] (could be a perl installation issue?)";
-        return $fh;
-      }
-      return
-    };
-
+      unshift @INC, sub {
+        if (my $fat = $fatpacked{$_[1]}) {
+          open my $fh, '<', \$fat
+            or die "FatPacker error loading $_[1] (could be a perl installation issue?)";
+          return $fh;
+        }
+        return
+      };
     } # END OF FATPACK CODE
   END_END
   my @segments = map {
@@ -210,9 +209,15 @@ sub generate_file_hash_style {
 sub generate_file_data_style {
   my($files, $main) = @_;
 
+  {
+    open my $main_fh, '<', $main or die "Can't open '$main': $!";
+    $files->{"fatpacked-main"} = join "", <$main_fh>;
+  }
+
   my $start = stripspace <<'  END_START';
   # This chunk of stuff was generated by App::FatPacker. Do not edit.
-  my %fatpacked = (
+  {
+    my %fatpacked = (
   END_START
 
   my @segments = map {
@@ -225,30 +230,29 @@ sub generate_file_data_style {
   my $fatpack_data;
   my $start_idx = 0;
   for my $segment (@segments) {
-    $fatpack_data .= "  ".perlstring($segment->[0])." => [$start_idx, $segment->[1]],\n";
+    $fatpack_data .= "    ".perlstring($segment->[0])." => [$start_idx, $segment->[1]],\n";
     $start_idx += $segment->[1];
   }
 
   my $end = stripspace <<'  END_END';
-  );
-
-  my $data_pos = tell DATA;
-  unshift @INC, sub {
-    if(my $fat = $fatpacked{$_[1]}) {
-      seek DATA, $data_pos + $fat->[0], 0;
-      local $/ = \$fat->[1];
-      open my $fh, '<', \scalar <DATA>;
-      return $fh;
-    }
-  };
+    );
 
+    my $data_pos = tell DATA;
+    unshift @INC, sub {
+      if(my $fat = $fatpacked{$_[1]}) {
+        seek DATA, $data_pos + $fat->[0], 0;
+        local $/ = \$fat->[1];
+        open my $fh, '<', \scalar <DATA>;
+        return $fh;
+      }
+    };
+  }
   # END OF FATPACK CODE
-  END_END
 
-  open my $main_fh, '<', $main or die "Can't open '$main': $!";
+  do 'fatpacked-main' or die $@;
+  END_END
 
   print join "\n", $start, $fatpack_data, $end;
-  print join "", <$main_fh>, "\n";
   print join "\n", "__DATA__", join "", map ${$_->[2]}, @segments;
 }