Add updater page, disabled by default

src/site/api/admin.js

@@ -0,0 +1,62 @@
+const child_process = require("child_process")
+const constants = require("../../lib/constants")
+const {render} = require("pinski/plugins")
+
+function run(command) {
+	return new Promise((resolve, reject) => {
+		child_process.exec(command, {encoding: "utf8"}, (error, stdout, stderr) => {
+			if (error) reject(error)
+			else resolve({stdout, stderr})
+		})
+	})
+}
+
+let lastFetchRunAt = 0
+async function fetch() {
+	if (lastFetchRunAt + constants.caching.updater_cache_time < Date.now()) {
+		await run("git fetch origin")
+		lastFetchRunAt = Date.now()
+	}
+}
+
+module.exports = [
+	{route: "/admin/updater", methods: ["GET"], code: async () => {
+		if (constants.settings.enable_updater_page) {
+			let {stdout: current} = await run("git rev-parse --abbrev-ref HEAD")
+			current = current.trim()
+			let {stdout: upstream} = await run("git rev-parse --abbrev-ref '@{u}'")
+			upstream = upstream.trim()
+			if (current !== "master" || upstream !== "origin/master") {
+				return render(200, "pug/admin_update.pug", {error: `Refusing to automatically update: current is ${current}, upstream is ${upstream}, need master and origin/master`})
+			} else {
+				await fetch()
+				let {stdout: log} = await run("git log --oneline origin/master ^master")
+				log = log.trim()
+				const numberOfCommits = log === "" ? 0 : log.split("\n").length
+				const {stdout: changedFiles} = await run("git diff master origin/master --name-only")
+				const changedFilesList = changedFiles.trim().split("\n")
+				let requiresRestart = false
+				let requiresDeps = false
+				if (changedFilesList.some(c => c.startsWith("src/lib") || c === "server.js")) {
+					requiresRestart = true
+				}
+				if (changedFilesList.some(c => c === "package.json" || c === "package-lock.json")) {
+					requiresDeps = true
+					requiresRestart = true
+				}
+				const formattedLog = log.split("\n").map(line => {
+					if (!line) return line // skip for empty string
+					const [hash, message] = line.match(/(\w+) (.*)$/).slice(1)
+					return {hash, message}
+				})
+				return render(200, "pug/admin_update.pug", {formattedLog, numberOfCommits, requiresDeps, requiresRestart})
+			}
+		} else {
+			return render(403, "pug/friendlyerror.pug", {
+				statusCode: 403,
+				title: "Updater page disabled",
+				message: "Updater page disabled"
+			})
+		}
+	}}
+]