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Preserve rfc section links #3956

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Jul 25, 2024
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56 changes: 37 additions & 19 deletions scripts/md2html/md2html.js
Original file line number Diff line number Diff line change
Expand Up @@ -266,34 +266,51 @@ for (let l in lines) {
if (!inCodeBlock) {

// minor fixups to get RFC links to work properly
if (line.indexOf('RFC [')>=0) {
line = line.replace('RFC [','[RFC');
}
line = line.replace('RFC [','[RFC');
line = line.replace('[Authorization header as defined in ','Authorization header as defined in [');
line = line.replace('[JSON Pointer]','JSON Pointer [RFC6901]'); // only in 2.0.md

//TODO: more "hidden" RFC references in older specs, for example
// [media type range](https://tools.ietf.org/html/rfc7231#appendix-D)
// [ABNF](https://tools.ietf.org/html/rfc5234)

//TODO: unconventional references to RFCs in 3.0.4 and 3.1.1, for example
// [RFC3986 §5.1.2 – 5.1.4](https://tools.ietf.org/html/rfc3986#section-5.1.2)
// RFC6570 [mentions](https://www.rfc-editor.org/rfc/rfc6570.html#section-2.4.2)
// [are not](https://datatracker.ietf.org/doc/html/rfc3986#appendix-A)
// [special behavior](https://www.rfc-editor.org/rfc/rfc1866#section-8.2.1)
// [RFC6570 considers to be _undefined_](https://datatracker.ietf.org/doc/html/rfc6570#section-2.3)
Comment on lines +277 to +282
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I'm entirely fine with making these more normal rather than working around them in the build script.


if (line.indexOf('[RFC')>=0) {
line = line.replace(/\[RFC ?([0-9]{1,5})\]/g,function(match,group1){
console.warn('Fixing RFC reference',match,group1);
// also detect [RFC4648 §3.2] etc. in 3.0.4.md and 3.1.1.md
line = line.replace(/\[RFC ?([0-9]{1,5})( §[0-9 .-]+)?\]/g,function(match,group1){
// console.warn('Fixing RFC reference',match,group1);
return '[[RFC'+group1+']]';
});
}

line = line.replace('http://tools.ietf.org','https://tools.ietf.org');
if (line.indexOf('xml2rfc.ietf.org')>0) {
line = line.replace('https://xml2rfc.ietf.org/public/rfc/html/rfc','https://tools.ietf.org/html/rfc');
line = line.replace('.html','');
}
line = line.replace(/\]\]\(https:\/\/tools.ietf.org\/html\/rfc[0-9]{1,5}\/?(\#.*?)?\)/g,function(match,group1){
//return (group1 ? group1 : '')+']]';
return ']]';
//TODO: non-link mentions of RFCs in 3.0.4 and 3.1.1, for example
// RFC3986's definition of [reserved](https://datatracker.ietf.org/doc/html/rfc3986#section-2.2)
Comment on lines +292 to +293
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Also fine with these being made more typical.


// harmonize RFC URLs
line = line.replace('http://www.ietf.org/rfc/rfc2119.txt','https://tools.ietf.org/html/rfc2119'); // only in 2.0.md
line = line.replace(/https:\/\/www.rfc-editor.org\/rfc\/rfc([0-9]{1,5})(\.html)?/g,'https://tools.ietf.org/html/rfc$1');
line = line.replaceAll('https://datatracker.ietf.org/doc/html/rfc','https://tools.ietf.org/html/rfc');
line = line.replaceAll('http://tools.ietf.org','https://tools.ietf.org');

// handle url fragments in RFC links and construct section titles links as well as RFC links
line = line.replace(/\]\]\(https:\/\/tools.ietf.org\/html\/rfc([0-9]{1,5})\/?(\#[^)]*)?\)/g, function(match, rfcNumber, fragment) {
if (fragment) {
// Extract section title from the fragment
let sectionTitle = fragment.replace('#', '').replace(/-/g, ' ');
sectionTitle = sectionTitle.charAt(0).toUpperCase() + sectionTitle.slice(1); // Capitalize the first letter
return `]] [${sectionTitle}](https://datatracker.ietf.org/doc/html/rfc${rfcNumber}${fragment})`;
} else {
return ']]';
}
});
}

// minor fixup to get bibliography link to work
//if (line.indexOf('[ABNF]')>=0) {
// line = line.replace('[ABNF]','[Augmented Backus-Naur Form]');
//}

if (!inCodeBlock && line.indexOf('](../') >= 0) {
const regExp = /\((\.\.[^)]+)\)/g;
line = line.replace(regExp,function(match,group1){
Expand All @@ -306,9 +323,10 @@ for (let l in lines) {
let heading = 0;
while (line[heading] === '#') heading++;
let delta = heading-prevHeading;
if (delta>1) console.warn(delta,line);
if (delta>0) delta = 1;
//if (delta<0) delta = -1;
if (Math.abs(delta)>1) console.warn(delta,line);
// if (Math.abs(delta)>1) console.warn(delta,line);
Comment on lines -311 to +329
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Any particular reason to keep this line as a comment instead of delete?

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Reverence for @MikeRalphson 😄

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Will remove them in a future PR

let prefix = '';
let newSection = '<section>';
if (line.includes('## Version ')) {
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