Refactor scripts (#2465)

* Refactor all kinds of scripts

* Update docs to ensure linter passes

scripts/release.js

@@ -0,0 +1,153 @@
+#!/usr/bin/env node
+/* eslint-disable no-process-exit */
+"use strict"
+
+// This is my temporary hack to simplify deployment until I fix the underlying
+// problems in these bugs:
+// - https://github.com/MithrilJS/mithril.js/issues/2417
+// - https://github.com/MithrilJS/mithril.js/pull/2422
+//
+// Depending on the complexity, it might become permanent. It really isn't that
+// helpful to create a release on Travis vs locally, aside from a couple extra
+// potential 2FA prompts by npm during login and publish.
+
+if (require.main !== module) {
+	throw new Error("This is a script, not a module!")
+}
+
+const path = require("path")
+const fs = require("fs")
+const {execFileSync} = require("child_process")
+const rimraf = require("rimraf")
+
+function showHelp() {
+	console.error(`
+scripts/release.sh increment [ --preid id ]
+
+Invoke as \`scripts/release.sh\` to invoke the release sequence, specifying the
+version increment via \`increment\` (required). Here's how they all work:
+
+- \`major\` increments from 1.0.0 or 2.0.0-beta.0 to 2.0.0
+- \`minor\` increments from 1.0.0 to 1.1.0
+- \`patch\` increments from 1.0.0 to 1.0.1
+- \`premajor\` increments from 1.0.0 to 2.0.0-beta.0
+- \`preminor\` increments from 1.0.0 to 1.1.0-beta.0
+- \`prepatch\` increments from 1.0.0 to 1.0.1-beta.0
+- \`prerelease\` increments from 2.0.0-beta.0 to 2.0.0-beta.1
+
+\`--preid beta\` specifies the \`beta\` part above (default). It's required for
+all \`pre*\` increment types except \`prerelease\`.
+
+See the docs for \`npm version\` <https://docs.npmjs.com/cli/version> for
+details on the \`increment\` parameter.
+`.trim())
+	process.exit(0)
+}
+
+function bail(...args) {
+	console.error(...args)
+	process.exit(1)
+}
+
+const rootDir = path.dirname(__dirname)
+const p = (...args) => path.resolve(rootDir, ...args)
+
+function readVersion() {
+	return JSON.parse(fs.readFileSync(p("../package.json"), "utf-8")).version
+}
+
+const parsed = require("minimist")(process.argv.slice(2), {
+	boolean: ["help"],
+	alias: {help: ["h", "?"]},
+	string: ["preid"],
+	"--": true,
+})
+
+if (parsed.help || !parsed["--"].length) showHelp()
+const publishType = parsed["--"][0]
+const publishPreid = parsed.preid
+const publishArgs = publishType.startsWith("pre") ? ["--tag", "next"] : []
+let releaseArgs = []
+
+if (publishType.startsWith("pre") && publishType !== "prerelease") {
+	if (publishPreid == null) {
+		bail("`pre*` increments other than `prerelease` require `--preid`")
+	}
+	releaseArgs = [`--preid=${publishPreid}`]
+}
+
+function exec(cmd, args, opts) {
+	return execFileSync(name, args, {
+		windowsHide: true,
+		stdio: "inherit",
+		encoding: "utf-8",
+		...opts,
+	})
+}
+
+const upstream = require("./_upstream")
+
+exec("git", ["checkout", "next"])
+exec("git", ["pull", "--rebase", upstream.fetch.branch, "next"])
+
+// Because I'm too lazy to make everything async.
+exec("read", ["-rsp", `
+Update "Upcoming" in \`docs/change-log.md\`. If moving a prerelease to stable,
+also replace all references to \`mithril@next\` to \`mithril\`, including in
+Flems snippets. Press enter once ready to continue.
+`.trim()], {shell: true})
+
+// Verify the changelog was updated
+let changelogUpdated = false
+let treeDirty = false
+
+for (const line of exec("git", ["status", "-z"]).split(/\0/g)) {
+	switch (line) {
+		case " M CHANGELOG.md":
+		case "M  CHANGELOG.md":
+		case "MM CHANGELOG.md":
+			changelogUpdated = true
+			break
+
+		default:
+			treeDirty = true
+	}
+}
+
+if (!changelogUpdated || treeDirty) {
+	if (!changelogUpdated) console.error("Error: Changelog must be updated!")
+	if (!treeDirty) console.error("Error: Tree must not be otherwise dirty!")
+	process.exit(1)
+}
+
+exec("git", ["add", "."])
+exec("git", ["commit", "-m", "Preparing for release"])
+
+exec("git", ["checkout", "master"])
+exec("git", ["pull", "--rebase", upstream.fetch.branch, "master"])
+// There may be merge conflicts with `index.js` and/or the bundle - just ignore
+// them. Whatever they have is canon, as is the case with everything else.
+exec("git", ["merge", "next", "-s", "theirs"])
+rimraf.sync(p("node_modules"))
+exec("npm", ["install-test"])
+
+exec("npm", ["version", "-m", "v%s", publishType, ...releaseArgs])
+
+exec("git", ["push", "--follow-tags", "origin", "master"])
+exec("git", ["push", "--follow-tags", upstream.push.branch, "master"])
+
+exec("git", ["checkout", "next"])
+exec("git", ["checkout", "master", "--", "mithril.js", "mithril.min.js"])
+// That's already been updated in `master`.
+exec("git", ["commit", "-m", `Generated bundles for ${readVersion()} [skip ci]`])
+
+exec("git", ["push"])
+exec("git", ["push", upstream.push.branch, "next"])
+
+exec("git", ["checkout", "master"])
+
+exec("npm", ["login"])
+exec("npm", ["publish", ...publishArgs])
+exec("npm", ["logout"])
+
+require("./update-docs")()