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.eleventy.js
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.eleventy.js
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const slugify = require("@sindresorhus/slugify");
const markdownIt = require("markdown-it");
const fs = require('fs');
const matter = require('gray-matter');
const faviconPlugin = require('eleventy-favicon');
module.exports = function(eleventyConfig) {
let markdownLib = markdownIt({
breaks: true,
html: true
})
.use(require("markdown-it-footnote"))
.use(require('markdown-it-mathjax3'), {
tex: {
inlineMath: [["$", "$"]]
},
options: {
skipHtmlTags: {'[-]': ['pre']}
}
})
.use(require('markdown-it-task-checkbox'), {
disabled: true,
divWrap: false,
divClass: 'checkbox',
idPrefix: 'cbx_',
ulClass: 'task-list',
liClass: 'task-list-item'
})
.use(namedHeadingsFilter)
.use(function(md) {
//https://github.com/DCsunset/markdown-it-mermaid-plugin
const origFenceRule = md.renderer.rules.fence || function(tokens, idx, options, env, self) {
return self.renderToken(tokens, idx, options, env, self);
};
md.renderer.rules.fence = (tokens, idx, options, env, slf) => {
const token = tokens[idx];
if (token.info === 'mermaid') {
const code = token.content.trim();
return `<pre class="mermaid">${code}</pre>`;
}
if (token.info === 'transclusion') {
const code = token.content.trim();
return `<div class="transclusion">${md.render(code)}</div>`;
}
if (token.info.startsWith("ad-")) {
const code = token.content.trim();
if (code && code.toLowerCase().startsWith("title:")) {
const title = code.substring(6, code.indexOf("\n"));
const titleDiv = title ? `<div class="admonition-title">${title}</div>` : '';
return `<div class="language-${token.info} admonition admonition-example admonition-plugin">${titleDiv}${md.render(code.slice(code.indexOf("\n")))}</div>`;
}
const title = `<div class="admonition-title">${token.info.charAt(3).toUpperCase()}${token.info.substring(4).toLowerCase()}</div>`;
return `<div class="language-${token.info} admonition admonition-example admonition-plugin">${title}${md.render(code)}</div>`;
}
// Other languages
return origFenceRule(tokens, idx, options, env, slf);
};
const defaultImageRule = md.renderer.rules.image || function(tokens, idx, options, env, self) {
return self.renderToken(tokens, idx, options, env, self);
};
md.renderer.rules.image = (tokens, idx, options, env, self) => {
const imageName = tokens[idx].content;
const [fileName, width] = imageName.split("|");
if (width) {
const widthIndex = tokens[idx].attrIndex('width');
const widthAttr = `${width}px`;
if (widthIndex < 0) {
tokens[idx].attrPush(['width', widthAttr]);
} else {
tokens[idx].attrs[widthIndex][1] = widthAttr;
}
}
return defaultImageRule(tokens, idx, options, env, self);
};
const defaultLinkRule = md.renderer.rules.link_open || function(tokens, idx, options, env, self) {
return self.renderToken(tokens, idx, options, env, self);
};
md.renderer.rules.link_open = function(tokens, idx, options, env, self) {
const aIndex = tokens[idx].attrIndex('target');
const classIndex = tokens[idx].attrIndex('class');
if (aIndex < 0) {
tokens[idx].attrPush(['target', '_blank']);
} else {
tokens[idx].attrs[aIndex][1] = '_blank';
}
if (classIndex < 0) {
tokens[idx].attrPush(['class', 'external-link']);
} else {
tokens[idx].attrs[classIndex][1] = 'external-link';
}
return defaultLinkRule(tokens, idx, options, env, self);
};
});
eleventyConfig.setLibrary("md", markdownLib);
eleventyConfig.addTransform('link', function(str) {
return str && str.replace(/\[\[(.*?)\]\]/g, function(match, p1) {
//Check if it is an embedded excalidraw drawing or mathjax javascript
if (p1.indexOf("],[") > -1 || p1.indexOf('"$"') > -1) {
return match;
}
const [fileLink, linkTitle] = p1.split("|");
let fileName = fileLink;
let header = "";
let headerLinkPath = "";
if(fileLink.includes("#")){
[fileName, header] = fileLink.split("#");
headerLinkPath = `#${headerToId(header)}`;
}
let permalink = `/notes/${slugify(fileName)}`;
const title = linkTitle ? linkTitle : fileName;
try {
const file = fs.readFileSync(`./src/site/notes/${fileName}.md`, 'utf8');
const frontMatter = matter(file);
if (frontMatter.data.permalink) {
permalink = frontMatter.data.permalink;
}
} catch {
//Ignore if file doesn't exist
}
return `<a class="internal-link" href="${permalink}${headerLinkPath}">${title}</a>`;
});
})
eleventyConfig.addTransform('highlight', function(str) {
return str && str.replace(/\=\=(.*?)\=\=/g, function(match, p1) {
return `<mark>${p1}</mark>`;
});
});
eleventyConfig.addPassthroughCopy("src/site/img");
eleventyConfig.addPlugin(faviconPlugin, { destination: 'dist' });
return {
dir: {
input: "src/site",
output: "dist",
data: `_data`
},
templateFormats: ["njk", "md", "11ty.js", "css"],
htmlTemplateEngine: "njk",
markdownTemplateEngine: "njk",
passthroughFileCopy: true,
};
};
function headerToId(heading){
return slugify(heading);
}
//https://github.com/rstacruz/markdown-it-named-headings/blob/master/index.js
function namedHeadingsFilter(md, options){
md.core.ruler.push('named_headings', namedHeadings.bind(null, md));
}
function namedHeadings (md, state) {
var ids = {}
state.tokens.forEach(function (token, i) {
if (token.type === 'heading_open') {
var text = md.renderer.render(state.tokens[i + 1].children, md.options)
var id = headerToId(text);
var uniqId = uncollide(ids, id)
ids[uniqId] = true
setAttr(token, 'id', uniqId)
}
})
}
function uncollide (ids, id) {
if (!ids[id]) return id
var i = 1
while (ids[id + '-' + i]) { i++ }
return id + '-' + i
}
function setAttr (token, attr, value, options) {
var idx = token.attrIndex(attr)
if (idx === -1) {
token.attrPush([ attr, value ])
} else if (options && options.append) {
token.attrs[idx][1] =
token.attrs[idx][1] + ' ' + value
} else {
token.attrs[idx][1] = value
}
}