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Using VIM As A Syntax Highlighting Engine From Ruby

12.20.2005

| 7851 views |

        You can use VIM as a syntax highlighting engine for code fragments in your blogs etc. The below code snippet works sort of, but it is slow for me. Not sure at the moment whether it is VIM or something else. Perhapps others can try it out and suggest speed or other improvments.

       def  vimsyn(text, filetype)
           synfile = Tempfile.new('synfile')
           synfile.close
           codefile = Tempfile.new('codefile')
           codefile << text
           codefile.close

           # filetype="matlab"

           expr = %Q%/usr/local/bin/vim -f -n -X -e -s -c \
               "set filetype=#{filetpe}" \
               -c "syntax on" \
               -c "set background=dark" \
               -c "let html_use_css=1" \
               -c "run syntax/2html.vim" \
               -c "wq! #{synfile.path}" -c "q" \ 
               #{codefile.path}%

           `#{expr}`
           html = IO.readlines(synfile.path).join
           body = html.match(/<body.*<\/body>/m)[0]
           css  = html.match(/<style.*<\/style>/m)[0]
           css.gsub!(/pre/,'pre.code')
           css.gsub!(/^body.*$/,'')
           body.gsub!(/^<body/,'<div')
           body.gsub!(/<\/body>/,'<div>')                                        
           body.gsub!(/<pre>/,'<pre class=code>')

           return css+body
       end

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Comments

Snippets Manager replied on Wed, 2006/10/25 - 11:41pm

this snippet helps me a lot! thanks for your posting. on my OSX 10.4.8, this script fails to execute tempfile like below:


irb(main):008:0> vimsyn(open('vimsyn.rb').readlines, 'ruby')
sh: line 2: /tmp/codefile.5090.1: Permission denied
=> "\npre.code { color: #ffffff; background-color: #000000; }\n\n\n\n\n\n\n"

use "system()" instead of "`#{expr}`" works on my environment.