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Title: Minimalistic markdown subset to html converter using awk |
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Author: Solène |
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Date: 26 August 2019 |
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Tags: unix awk |
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Description: |
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Hello |
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As on my blog I use different markup languages I would like to use a |
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simpler |
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markup language not requiring an extra package. To do so, I wrote an |
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awk |
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script handling titles, paragraphs and code blocks the same way |
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markdown does. |
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**16 December 2019 UPDATE**: adc sent me a patch to add ordered and |
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unordered list. |
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Code below contain the addition. |
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It is very easy to use, like: `awk -f mmd file.mmd > output.html` |
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The script is the following: |
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BEGIN { |
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in_code=0 |
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in_list_unordered=0 |
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in_list_ordered=0 |
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in_paragraph=0 |
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} |
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# escape < > characters |
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gsub(/</,"\<",$0); |
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gsub(/>/,"\>",$0); |
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if(! match($0,/^ /)) { |
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if(in_code) { |
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in_code=0 |
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printf "</code></pre>\n" |
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} |
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} |
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if(! match($0,/^- /)) { |
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if(in_list_unordered) { |
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in_list_unordered=0 |
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printf "</ul>\n" |
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} |
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} |
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if(! match($0,/^[0-9]+\. /)) { |
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if(in_list_ordered) { |
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in_list_ordered=0 |
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printf "</ol>\n" |
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} |
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} |
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if(match($0,/^#/)) { |
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if(match($0,/^(#+)/)) { |
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printf "<h%i>%s</h%i>\n", RLENGTH, |
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substr($0,index($0,$2)), RLENGTH |
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} |
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} else if(match($0,/^ /)) { |
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if(in_code==0) { |
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in_code=1 |
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printf "<pre><code>" |
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print substr($0,5) |
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} else { |
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print substr($0,5) |
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} |
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} else if(match($0,/^- /)) { |
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if(in_list_unordered==0) { |
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in_list_unordered=1 |
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printf "<ul>\n" |
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printf "<li>%s</li>\n", substr($0,3) |
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} else { |
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printf "<li>%s</li>\n", substr($0,3) |
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} |
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} else if(match($0,/^[0-9]+\. /)) { |
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n=index($0," ")+1 |
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if(in_list_ordered==0) { |
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in_list_ordered=1 |
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printf "<ol>\n" |
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printf "<li>%s</li>\n", substr($0,n) |
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} else { |
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printf "<li>%s</li>\n", substr($0,n) |
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} |
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} else { |
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if(length($0) == 0 && in_paragraph == 1 && in_code |
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== 0) { |
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in_paragraph=0 |
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printf "</p>" |
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} # we are still in a paragraph |
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if(length($0) != 0 && in_paragraph == 1) { |
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} # open a p tag if previous line is empty |
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if(length(previous_line)==0 && in_paragraph==0) { |
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in_paragraph=1 |
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printf "<p>%s\n", $0 |
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} |
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} |
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previous_line = $0 |
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} |
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if(in_code==1) { |
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printf "</code></pre>\n" |
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} |
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if(in_list_unordered==1) { |
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printf "</ul>\n" |
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} |
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if(in_list_ordered==1) { |
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printf "</ol>\n" |
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} |
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if(in_paragraph==1) { |
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printf "</p>\n" |
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} |
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} |
