115 lines
3.3 KiB
JavaScript
115 lines
3.3 KiB
JavaScript
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import Debug from 'debug';
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import {URL} from 'url';
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import {default as isFauxInternal} from '../utils/is-faux-internal.js';
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const indexRE = /(^|.*\/)index.md(#?.*)$/i;
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const EXTERNAL_URL_RE = /^(?:[a-z]+:|\/\/)/i;
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function isExternal(path) {
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return EXTERNAL_URL_RE.test(path);
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}
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function normalizeHref(hrefAttr, env) {
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let url = hrefAttr[1];
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const indexMatch = url.match(indexRE);
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if (indexMatch) {
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const [, path, hash] = indexMatch;
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url = path + hash;
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} else {
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let cleanUrl = url.replace(/[?#].*$/, '');
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// transform foo.md -> foo[.html]
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if (cleanUrl.endsWith('.md')) {
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cleanUrl = cleanUrl.replace(/\.md$/, env.cleanUrls ? '' : '.html');
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}
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// transform ./foo -> ./foo[.html]
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if (
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!env.cleanUrls &&
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!cleanUrl.endsWith('.html') &&
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!cleanUrl.endsWith('/')
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) {
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cleanUrl += '.html';
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}
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const parsed = new URL(url, 'http://a.com');
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url = cleanUrl + parsed.search + parsed.hash;
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}
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// ensure leading . for relative paths
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if (!url.startsWith('/') && !/^\.\//.test(url)) {
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url = './' + url;
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}
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// export it for existence check
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pushLink(url.replace(/\.html$/, ''), env);
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// markdown-it encodes the uri
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hrefAttr[1] = decodeURI(url);
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}
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function pushLink(link, env) {
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const links = env.links || (env.links = []);
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links.push(link);
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}
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export default function(md, externalAttrs, base, domains, debug = Debug('@lando/markdown-plugin')) { // eslint-disable-line
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md.renderer.rules.link_open = (
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tokens,
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idx,
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options,
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env,
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self,
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) => {
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const token = tokens[idx];
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const hrefIndex = token.attrIndex('href');
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if (hrefIndex >= 0) {
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const hrefAttr = token.attrs[hrefIndex];
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const url = hrefAttr[1];
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if (isExternal(url)) {
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// set external attributes unless faux internal
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if (!isFauxInternal(url, domains)) {
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Object.entries(externalAttrs).forEach(([key, val]) => {
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token.attrSet(key, val);
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});
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// we need to for _self for fauxinternals
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} else {
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token.attrSet('target', '_self');
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}
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// catch localhost links as dead link
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if (url.replace(EXTERNAL_URL_RE, '').startsWith('//localhost:')) {
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pushLink(url, env);
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}
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hrefAttr[1] = url;
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} else {
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if (
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// internal anchor links
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!url.startsWith('#') &&
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// mail/custom protocol links
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new URL(url, 'http://a.com').protocol.startsWith('http') &&
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// links to files (other than html/md)
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!/\.(?!html|md)\w+($|\?)/i.test(url)
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) {
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normalizeHref(hrefAttr, env);
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} else if (url.startsWith('#')) {
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hrefAttr[1] = decodeURI(hrefAttr[1]);
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}
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// append base to internal (non-relative) urls
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if (hrefAttr[1].startsWith('/')) {
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hrefAttr[1] = `${base}${hrefAttr[1]}`.replace(/\/+/g, '/');
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}
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}
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// encode vite-specific replace strings in case they appear in URLs
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// this also excludes them from build-time replacements (which injects
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// <wbr/> and will break URLs)
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hrefAttr[1] = hrefAttr[1]
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.replace(/\bimport\.meta/g, 'import%2Emeta')
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.replace(/\bprocess\.env/g, 'process%2Eenv');
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}
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return self.renderToken(tokens, idx, options);
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};
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debug('added custom markdown %o rule with config %o', 'link_open', {base, domains});
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};
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