chapters2documents.rb example raises an error

[xbelanch]

Pandoc responded with:

data-dir/filters/chapters2documents.rb:22:in `block in <main>': undefined method `parent' for nil:NilClass (NoMethodError)
	from /home/xbelanch/.rvm/gems/ruby-3.0.0/gems/paru-1.1.0/lib/paru/filter.rb:290:in `instance_eval'
	from /home/xbelanch/.rvm/gems/ruby-3.0.0/gems/paru-1.1.0/lib/paru/filter.rb:290:in `filter'
	from /home/xbelanch/.rvm/gems/ruby-3.0.0/gems/paru-1.1.0/lib/paru/filter.rb:252:in `run'
	from data-dir/filters/chapters2documents.rb:15:in `<main>'
Error running filter data-dir/filters/chapters2documents.rb:

[htdebeer]

Thanks for your bug report. However, it's a bit sparse on the details. For me to look into your issue, I need to be able to reproduce your issue on my end. To that end, can you:

• supply a minimal but complete example where this issue occurs? I.e., have an input file, the actual filter, and the pandoc invocation that results in this error message?
• tell me which operating system and pandoc version you're using when this issue occurs?

[xbelanch]

Sorry @htdebeer for the laconic and not helpful bug report. Hope this helps out to reproduce the issue and find the solution:

Operaing System: WSL2 (Linux X99-Rotter 5.15.90.1-microsoft-standard-WSL2 #1 SMP Fri Jan 27 02:56:13 UTC 2023 x86_64 GNU/Linux) under Windows 10 Pro 19045.2846.

Pandoc version:

$ pandoc -v
pandoc 3.1.1
Features: +server +lua
Scripting engine: Lua 5.4
User data directory: /home/xbelanch/.pandoc
Copyright (C) 2006-2023 John MacFarlane. Web:  https://pandoc.org
This is free software; see the source for copying conditions. There is no
warranty, not even for merchantability or fitness for a particular purpose.

I included a simple demo files that raises the error. Btw the full output:

pandoc	--from=markdown \
	--to=html \
	--filter=data-dir/filters/chapters2documents.rb

Pandoc responded with:

data-dir/filters/chapters2documents.rb:22:in `block in <main>': undefined method `parent' for nil:NilClass (NoMethodError)
	from /home/xbelanch/.rvm/gems/ruby-3.0.0/gems/paru-1.1.0/lib/paru/filter.rb:291:in `instance_eval'
	from /home/xbelanch/.rvm/gems/ruby-3.0.0/gems/paru-1.1.0/lib/paru/filter.rb:291:in `filter'
	from /home/xbelanch/.rvm/gems/ruby-3.0.0/gems/paru-1.1.0/lib/paru/filter.rb:253:in `run'
	from data-dir/filters/chapters2documents.rb:15:in `<main>'
Error running filter data-dir/filters/chapters2documents.rb:
Filter returned error status 1

Using configuration hierarchy: - /home/xbelanch/.rvm/gems/ruby-3.0.0/gems/pandocomatic-1.1.0/lib/pandocomatic/default_configuration.yaml - /home/xbelanch/Programming/playground/77/pandocomatic.yml 1 command to execute to convert '/home/xbelanch/Programming/playground/77/sandbox.md' to 'output/index.html'. pandoc --from=markdown \ --to=html \ --filter=data-dir/filters/chapters2documents.rb

77.zip

[htdebeer]

I can reproduce the issue. I think I've introduced this erroneous behavior when I added the before and after blocks feature in #38.

I'll fix this, but that might take a week or so. Until then, as a workaround, only use current_node when Filter's instance variable @ran_before is true. In your example, you can write:

...
  if @ran_before
    doc << current_node if current_node.parent.is_a? Paru::PandocFilter::Document
  end
...

[htdebeer]

Can you verify that your issue is resolved with paru version 1.1.1?

[xbelanch]

Works flawlessly! Thanks again!