utftex not available?

[cabo]

Describe the issue

It seems that utftex is not available from the author-tools.ietf.org kramdown-rfc installation (neither is its fallback asciitex).

Error output below.

Test file: https://mailarchive.ietf.org/arch/msg/auth48archive/Tid9kgFH8zAPSOGxLDzNlQRTKF8/2/
(draft-ietf-core-href-30-no-kgt.md)

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processing error: ---

• No link definition for link ID 'i-d.bormann-cbor-draft-numbers' found on line 1807
  ** utftex not working, falling back to asciitex
  /usr/lib/ruby/3.2.0/open3.rb:222:in spawn': No such file or directory - asciitex (Errno::ENOENT) from /usr/lib/ruby/3.2.0/open3.rb:222:in popen_run'
  from /usr/lib/ruby/3.2.0/open3.rb:103:in popen3' from /usr/lib/ruby/3.2.0/open3.rb:290:in capture3'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:658:in rescue in svg_tool_process' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:649:in svg_tool_process'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:561:in call' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:561:in rescue in memoize'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:557:in memoize' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:740:in convert_codeblock'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:421:in block in inner_a' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:419:in map'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:419:in inner_a' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:426:in inner'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:1675:in convert_root' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:414:in convert1'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:409:in convert' from /var/lib/gems/3.2.0/gems/kramdown-2.4.0/lib/kramdown/converter/base.rb:107:in convert'
  from /var/lib/gems/3.2.0/gems/kramdown-2.4.0/lib/kramdown/document.rb:116:in method_missing' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc/command.rb:676:in '
  from :86:in require' from :86:in require'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/bin/kramdown-rfc:8:in ' from /usr/local/bin/kramdown-rfc:25:in load'
  from /usr/local/bin/kramdown-rfc:25:in ' /usr/lib/ruby/3.2.0/open3.rb:222:inspawn': No such file or directory - utftex (Errno::ENOENT)
  from /usr/lib/ruby/3.2.0/open3.rb:222:in popen_run' from /usr/lib/ruby/3.2.0/open3.rb:103:in popen3'
  from /usr/lib/ruby/3.2.0/open3.rb:290:in capture3' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:651:in svg_tool_process'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:561:in call' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:561:in rescue in memoize'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:557:in memoize' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:740:in convert_codeblock'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:421:in block in inner_a' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:419:in map'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:419:in inner_a' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:426:in inner'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:1675:in convert_root' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:414:in convert1'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:409:in convert' from /var/lib/gems/3.2.0/gems/kramdown-2.4.0/lib/kramdown/converter/base.rb:107:in convert'
  from /var/lib/gems/3.2.0/gems/kramdown-2.4.0/lib/kramdown/document.rb:116:in method_missing' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc/command.rb:676:in '
  from :86:in require' from :86:in require'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/bin/kramdown-rfc:8:in ' from /usr/local/bin/kramdown-rfc:25:in load'
  from /usr/local/bin/kramdown-rfc:25:in ' /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:558:inbinread': No such file or directory @ rb_sysopen - /tmp/cache/refcache/kdrfc-1_7_29-svg_tool_process-c80b4f8236f9cbc2987ac338c5801da8de5e8404.cache (Errno::ENOENT)
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:558:in memoize' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:740:in convert_codeblock'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:421:in block in inner_a' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:419:in map'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:419:in inner_a' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:426:in inner'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:1675:in convert_root' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:414:in convert1'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc2629.rb:409:in convert' from /var/lib/gems/3.2.0/gems/kramdown-2.4.0/lib/kramdown/converter/base.rb:107:in convert'
  from /var/lib/gems/3.2.0/gems/kramdown-2.4.0/lib/kramdown/document.rb:116:in method_missing' from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/lib/kramdown-rfc/command.rb:676:in '
  from :86:in require' from :86:in require'
  from /var/lib/gems/3.2.0/gems/kramdown-rfc2629-1.7.29/bin/kramdown-rfc:8:in ' from /usr/local/bin/kramdown-rfc:25:in load'
  from /usr/local/bin/kramdown-rfc:25:in `
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[cabo]

I was assuming it is available from

#368

(and while you are looking at this, maybe you can do
#617
as well, possibly using the installation code from Martin Thomson's v1m docker image.)

[cabo]

installation code from Martin Thomson's v1m docker image

https://github.com/martinthomson/i-d-template/blob/main/docker/math/Dockerfile

[kesara]

@cabo, utftex was removed due to building issues. I'll look if this can be added again without any issues.

[kesara]

@cabo, utftex was removed because tex2svg(https://github.com/mathjax/MathJax-demos-node/tree/master) is outdated and can not be installed with new node versions. Also there are security issues.

If kramdown-rfc can rely only on utftex, I can include that in author tools.

Right now, for draft-ietf-core-href-30-no-kgt.md with only utftex installed I get following error:

---
- No link definition for link ID 'i-d.bormann-cbor-draft-numbers' found on line 1807
*** [math:] sh: 1: tex2svg: not found
*** Can't clean SVG: undefined method `document' for nil:NilClass
*** [svgcheck:] ERROR: Unable to parse the XML document: /tmp/kramdown-rfc20251205-204-37l3d5
*** could not create svg for "scheme-id = -1 - sc...

[cabo]

I fixed mathjax-node-cli so it can be installed. Please see instructions at
https://github.com/cabo/kramdown-rfc/wiki/SVG#math
or in the Dockerfile mentioned above.