1 files changed, 74 insertions, 0 deletions
diff --git a/scripts/index.mjs b/scripts/index.mjs
new file mode 100644
index 0000000..576cfb8
--- /dev/null
+++ b/scripts/index.mjs
@@ -0,0 +1,74 @@
+import { readFile, writeFile } from 'fs/promises'
+
+import centra from 'centra'
+import pLimit from 'p-limit'
+import { remark } from 'remark'
+import remarkGfm from 'remark-gfm'
+import { select, selectAll } from 'unist-util-select'
+
+const baseurl = process.argv[2]
+const inputFile = process.argv[3]
+const outputFile = process.argv[4]
+
+const selector = 'tableCell:first-child inlineCode'
+const sortEntries = async tree => {
+	const rows = select('table', tree)
+	const header = rows.children.shift()
+
+	rows.children.sort((first, second) =>
+		select(selector, first).value
+			.localeCompare(select(selector, second).value))
+
+	rows.children.unshift(header)
+	return tree
+}
+
+const makeUrl = link => link.url.startsWith('http') ? link.url : baseurl + link.url
+
+const get404s = async tree => {
+	const rows = select('table', tree)
+	const links = selectAll('tableCell:first-child link', rows)
+		.map(makeUrl)
+
+
+	const limit = pLimit(5)
+	const reqs = links
+		.map(url => 
+			limit(() => centra(url, 'HEAD')
+				.send()
+				.then(res => [url, res.statusCode])
+				.catch(() => [url, undefined])))
+	
+	const status = await Promise.all(reqs)
+	const good = new Set(status.filter(([_, s]) => typeof s === 'number' && s < 400).map(([url]) => url))
+
+	if (good.size !== status.length) {
+		console.log(`Found ${status.length - good.size} broken URLs`)
+		status
+			.filter(([url]) => !good.has(url))
+			.forEach(([url, status]) => console.log(`${url} : ${typeof status === 'number' ? status : 'failed'}`))
+	}
+
+	// filter the table
+	rows.children = rows.children
+		.filter(row => {
+			const link = select('tableCell:first-child link', row)
+			return link ? good.has(makeUrl(link)) : true
+		})
+
+
+	return tree
+}
+
+const main = async () => {
+	const file = await readFile(inputFile, { encoding: 'utf-8' })
+	const output = await remark()
+		.use(remarkGfm)
+		.use(() => get404s)
+		.use(() => sortEntries)
+		.process(file)
+
+	await writeFile(outputFile, String(output))
+}
+
+main()