jekyll-asciidoc: undefined method `nil_or_empty?' for String

Hello,

I’m trying to make Jekyll excerpts work, but I unfortunately come upon this trace:

Conversion error: Jekyll::AsciiDoc::Converter encountered an error while converting '_posts/2012-03-11-html5-still-a-non-event.adoc':
                    undefined method `nil_or_empty?' for #<String:0x007fa72f7dfdb0>
  Liquid Exception: undefined method `nil_or_empty?' for #<String:0x007fa72f7dfdb0> in tag/html-5/index.html
/Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-asciidoc-2.0.1/lib/jekyll-asciidoc/converter.rb:207:in `convert': undefined method `nil_or_empty?' for #<String:0x007fa72f7dfdb0> (NoMethodError)
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/renderer.rb:109:in `block in convert'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/renderer.rb:107:in `each'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/renderer.rb:107:in `reduce'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/renderer.rb:107:in `convert'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/renderer.rb:86:in `run'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/excerpt.rb:72:in `output'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/excerpt.rb:59:in `to_s'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/drops/document_drop.rb:22:in `excerpt'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/drops/drop.rb:52:in `public_send'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/drops/drop.rb:52:in `[]'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/context.rb:201:in `lookup_and_evaluate'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/variable_lookup.rb:48:in `block in evaluate'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/variable_lookup.rb:38:in `each_index'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/variable_lookup.rb:38:in `evaluate'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/context.rb:168:in `evaluate'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/context.rb:160:in `[]'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/condition.rb:101:in `interpret_condition'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/condition.rb:39:in `evaluate'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/tags/if.rb:38:in `block (2 levels) in render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/tags/if.rb:37:in `each'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/tags/if.rb:37:in `block in render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/context.rb:132:in `stack'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/tags/if.rb:36:in `render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:151:in `render_token'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/profiler/hooks.rb:5:in `block in render_token_with_profiling'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/profiler.rb:80:in `profile_token_render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/profiler/hooks.rb:4:in `render_token_with_profiling'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:135:in `block in render_all'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:122:in `each'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:122:in `render_all'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:108:in `render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/template.rb:210:in `block in render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/template.rb:262:in `with_profiling'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/template.rb:209:in `render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/template.rb:222:in `render!'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/liquid_renderer/file.rb:28:in `block (2 levels) in render!'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/liquid_renderer/file.rb:40:in `measure_bytes'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/liquid_renderer/file.rb:27:in `block in render!'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/liquid_renderer/file.rb:47:in `measure_time'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/liquid_renderer/file.rb:26:in `render!'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/tags/include.rb:138:in `block in render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/context.rb:132:in `stack'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/tags/include.rb:136:in `render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:151:in `render_token'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/profiler/hooks.rb:5:in `block in render_token_with_profiling'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/profiler.rb:80:in `profile_token_render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/profiler/hooks.rb:4:in `render_token_with_profiling'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:135:in `block in render_all'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:122:in `each'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:122:in `render_all'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/tags/for.rb:113:in `block (2 levels) in render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/tags/for.rb:100:in `each'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/tags/for.rb:100:in `each_with_index'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/tags/for.rb:100:in `block in render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/context.rb:132:in `stack'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/tags/for.rb:99:in `render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:151:in `render_token'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/profiler/hooks.rb:5:in `block in render_token_with_profiling'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/profiler.rb:80:in `profile_token_render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/profiler/hooks.rb:4:in `render_token_with_profiling'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:135:in `block in render_all'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:122:in `each'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:122:in `render_all'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/block.rb:108:in `render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/template.rb:210:in `block in render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/template.rb:262:in `with_profiling'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/template.rb:209:in `render'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/liquid-3.0.6/lib/liquid/template.rb:222:in `render!'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/liquid_renderer/file.rb:28:in `block (2 levels) in render!'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/liquid_renderer/file.rb:40:in `measure_bytes'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/liquid_renderer/file.rb:27:in `block in render!'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/liquid_renderer/file.rb:47:in `measure_time'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/liquid_renderer/file.rb:26:in `render!'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/renderer.rb:134:in `render_liquid'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/renderer.rb:82:in `run'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/convertible.rb:211:in `do_layout'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/page.rb:135:in `render'
	from /Users/i303869/projects/private/nfrankel.gitlab.io/_plugins/tags.rb:43:in `write_tag_index'
	from /Users/i303869/projects/private/nfrankel.gitlab.io/_plugins/tags.rb:36:in `block in generate'
	from /Users/i303869/projects/private/nfrankel.gitlab.io/_plugins/tags.rb:35:in `each'
	from /Users/i303869/projects/private/nfrankel.gitlab.io/_plugins/tags.rb:35:in `generate'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/site.rb:174:in `block in generate'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/site.rb:172:in `each'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/site.rb:172:in `generate'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/site.rb:68:in `process'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/command.rb:26:in `process_site'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/commands/build.rb:63:in `build'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/commands/build.rb:34:in `process'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/lib/jekyll/commands/serve.rb:37:in `block (2 levels) in init_with_program'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `call'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `block in execute'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `each'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `execute'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/mercenary-0.3.6/lib/mercenary/program.rb:42:in `go'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/mercenary-0.3.6/lib/mercenary.rb:19:in `program'
	from /Users/i303869/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/jekyll-3.3.1/exe/jekyll:13:in `<top (required)>'
	from /usr/local/bin/jekyll:22:in `load'
	from /usr/local/bin/jekyll:22:in `<main>'

I’m using:

Ruby 2.2.3
Jekyll 3.3.1
jekyll-asciidoctor plugin 2.0.1

Interestingly enough, it works if:

Either I remove *.adoc files
Or don’t try to write excerpts

Hints welcome, many thanks.

About this issue

Original URL
State: closed
Created 8 years ago
Comments: 19 (12 by maintainers)

Commits related to this issue

resolves #142 don't call nil_or_empty? outside of an Asciidoctor context — committed to mojavelinux/jekyll-asciidoc by mojavelinux 7 years ago
resolves #142 don't call nil_or_empty? outside of an Asciidoctor context (PR #169) — committed to asciidoctor/jekyll-asciidoc by mojavelinux 7 years ago
add entry for #142 to CHANGELOG — committed to asciidoctor/jekyll-asciidoc by mojavelinux 6 years ago

Most upvoted comments

I realize now why I couldn’t reproduce. I was loading asciidoctor-diagram, which was in turn loading Asciidoctor.

There are at least two ways to workaround the problem before I apply the patch.

Add Asciidoctor to the :jekyll_plugins group in your Gemfile:

group :jekyll_plugins do
  gem 'asciidoctor'
end

Create a blank plugin file at _plugins/asciidoctor.rb that requires Asciidoctor

require 'asciidoctor'

Long story, short, you need to force Asciidoctor to load eagerly to avoid this sort of problem.

mojavelinux on Nov 1, 2017

@nfrankel I just tested with your blog and it fixes the error. I just added the following to the top of _plugins/tags.rb

require 'asciidoctor'

One thing I noticed about that tags plugin is that it runs before the Jekyll AsciiDoc integrator runs. Therefore, the only metadata available at that time is metadata defined in the front matter. The information in the AsciiDoc document header is not yet seen. That’s okay in your case since you are defining all metadata in front matter. But it will be something we’ll have to sort out if others want to use the tags plugin with integrated AsciiDoc metadata.

mojavelinux on Nov 1, 2017

Great! I’ll have a look.

mojavelinux on May 29, 2017

I also think I understand now how to make excerpts work correctly…or at least I have an idea. But I need to test that theory.

mojavelinux on May 28, 2017