using pp without require 'pp' when $DEBUG = True

using pp without require 'pp' when $DEBUG = True

[Robinson Jr, James P (Jim) HHHH]

Hello, 
 	I am not usually a ruby developer, and I just recently stumbled across
an odd bug, that only someone who  didn¹t know what they were doing would
stumble across.  I am honestly not sure if this really counts as a bug,
but I thought I should let you know.

unicorn/lib/unicorn.rb line 62 is:

      pp({ :inner_app => inner_app }) if $DEBUG

Nowhere in the file is there require Œpp¹

This is not an issue if you run "unicorn -d config.ru², but If you
manually set $DEBUG = true,  which I foolishly did because I didn¹t
realize that $DEBUG was a special variable in ruby,  you get an undefined
method error.   


I will be changing my code to use a different variable name, however I am
not sure if there are valid reasons to manually set $DEBUG in ruby.  If
there are, this may be an issue for others.

I think the simplest solution would be to replace the line above with an
if block:

      if $DEBUG
        require 'pp'
        pp({ :inner_app => inner_app })
      end


Similar blocks appear in unicorn/bin/unicorn and
unicorn/bin/unicorn_rails. I am assuming the one in unicorn/bin/unicorn
is the one that allows it to work when using the -d flag. If there really
is never any reason to manually set $DEBUG I¹m sorry I wasted your time.

In any case, thank you for Unicorn!

Jim Robinson

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Re: using pp without require 'pp' when $DEBUG = True

[Eric Wong]

"Robinson Jr, James P (Jim)      HHHH" <James.Robinson3@Cigna.com> wrote:
> This is not an issue if you run "unicorn -d config.ru², but If you
> manually set $DEBUG = true,  which I foolishly did because I didn¹t
> realize that $DEBUG was a special variable in ruby,  you get an undefined
> method error.   

Right, thanks for the bug report.

> I will be changing my code to use a different variable name, however I am
> not sure if there are valid reasons to manually set $DEBUG in ruby.  If
> there are, this may be an issue for others.

Yes, $DEBUG is a special variable in Ruby, and documented in the
ruby manpage; anybody is allowed to set it.

> I think the simplest solution would be to replace the line above with an
> if block:
> 
>       if $DEBUG
>         require 'pp'
>         pp({ :inner_app => inner_app })
>       end

Right, I'll prepare a patch tonight (gotta run out, soon) and
probably make a bugfix release in the next day or two, for this.

> Similar blocks appear in unicorn/bin/unicorn and
> unicorn/bin/unicorn_rails. I am assuming the one in unicorn/bin/unicorn
> is the one that allows it to work when using the -d flag. If there really
> is never any reason to manually set $DEBUG I¹m sorry I wasted your time.
> 
> In any case, thank you for Unicorn!

No problem!

[PATCH] require 'pp' if $DEBUG is set by Rack app

[Eric Wong]

While "unicorn -d" requires 'pp' when setting $DEBUG, we did not
account for (rare) Rack applications setting $DEBUG at load time.

Thanks-to: James P (Jim) Robinson Jr <James.Robinson3@Cigna.com>
---
 lib/unicorn.rb | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/unicorn.rb b/lib/unicorn.rb
index 4bd7bda..e7bc9ce 100644
--- a/lib/unicorn.rb
+++ b/lib/unicorn.rb
@@ -59,7 +59,10 @@ def self.builder(ru, op)
         Object.const_get(File.basename(ru, '.rb').capitalize)
       end
 
-      pp({ :inner_app => inner_app }) if $DEBUG
+      if $DEBUG
+        require 'pp'
+        pp({ :inner_app => inner_app })
+      end
 
       return inner_app if no_default_middleware
 
-- 
EW