2020-10-11 13:26:24 +00:00
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const pug = require("pug")
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const sass = require("sass")
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const fs = require("fs").promises
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const os = require("os")
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const crypto = require("crypto")
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const path = require("path")
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const pj = path.join
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const babel = require("@babel/core")
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const fetch = require("node-fetch")
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const chalk = require("chalk")
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const hint = require("jshint").JSHINT
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process.chdir(pj(__dirname, "src"))
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const buildDir = "../build"
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const validationQueue = []
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const validationHost = os.hostname() === "future" ? "http://localhost:8888/" : "http://validator.w3.org/nu/"
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const static = new Map()
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const links = new Map()
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const pugLocals = {static, links}
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const spec = require("./spec.js")
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function hash(buffer) {
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return crypto.createHash("sha256").update(buffer).digest("hex").slice(0, 10)
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}
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function validate(filename, body, type) {
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const promise = fetch(validationHost+"?out=json", {
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method: "POST",
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body,
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headers: {
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"content-type": `text/${type}; charset=UTF-8`
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}
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}).then(res => res.json()).then(root => {
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return function cont() {
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let concerningMessages = 0
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for (const message of root.messages) {
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if (message.hiliteStart) {
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let type = message.type
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if (message.type === "error") {
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type = chalk.red("error")
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} else if (message.type === "warning") {
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type = chalk.yellow("warning")
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} else {
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continue // don't care about info
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}
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2020-10-12 12:35:54 +00:00
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let match
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if (match = message.message.match(/Property “([\w-]+)” doesn't exist.$/)) {
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// allow these properties specifically
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if (["scrollbar-width", "scrollbar-color"].includes(match[1])) {
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continue
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}
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}
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2020-10-11 13:26:24 +00:00
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concerningMessages++
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console.log(`validation: ${type} in ${filename}`)
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console.log(` ${message.message}`)
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const text = message.extract.replace(/\n/g, "⏎").replace(/\t/g, " ")
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console.log(chalk.grey(
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" "
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+ text.slice(0, message.hiliteStart)
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+ chalk.inverse(text.substr(message.hiliteStart, message.hiliteLength))
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+ text.slice(message.hiliteStart+message.hiliteLength)
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))
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} else {
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console.log(message)
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}
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}
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if (!concerningMessages) {
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console.log(`validation: ${chalk.green("ok")} for ${filename}`)
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}
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}
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})
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validationQueue.push(promise)
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return promise
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}
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function runHint(filename, source) {
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hint(source, {
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esversion: 9,
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undef: true,
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2020-10-15 09:06:41 +00:00
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// unused: true,
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2020-10-11 13:26:24 +00:00
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loopfunc: true,
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2020-10-15 09:06:41 +00:00
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globals: ["console", "URLSearchParams"],
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browser: true,
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asi: true,
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2020-10-11 13:26:24 +00:00
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})
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const result = hint.data()
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2020-10-15 09:06:41 +00:00
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let problems = 0
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if (result.errors) {
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2020-10-11 13:26:24 +00:00
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for (const error of result.errors) {
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if (error.evidence) {
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const text = error.evidence.replace(/\t/g, " ")
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2020-10-15 09:06:41 +00:00
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if ([
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"W014"
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].includes(error.code)) continue
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2020-10-11 13:26:24 +00:00
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let type = error.code.startsWith("W") ? chalk.yellow("warning") : chalk.red("error")
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console.log(`hint: ${type} in ${filename}`)
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console.log(` ${error.line}:${error.character}: ${error.reason} (${error.code})`)
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console.log(chalk.gray(
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" "
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2020-10-15 09:06:41 +00:00
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+ text.slice(0, error.character)
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+ chalk.inverse(text.substr(error.character, 1))
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+ text.slice(error.character+1)
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2020-10-11 13:26:24 +00:00
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))
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2020-10-15 09:06:41 +00:00
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problems++
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2020-10-11 13:26:24 +00:00
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}
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}
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2020-10-15 09:06:41 +00:00
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}
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if (problems) {
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console.log(`hint: ${chalk.cyan(problems+" problems")} in ${filename}`)
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2020-10-11 13:26:24 +00:00
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} else {
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console.log(`hint: ${chalk.green("ok")} for ${filename}`)
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}
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}
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async function addFile(sourcePath, targetPath) {
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const contents = await fs.readFile(pj(".", sourcePath), {encoding: null})
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static.set(sourcePath, `${targetPath}?static=${hash(contents)}`)
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fs.writeFile(pj(buildDir, targetPath), contents)
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}
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async function addJS(sourcePath, targetPath) {
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const source = await fs.readFile(pj(".", sourcePath), {encoding: "utf8"})
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static.set(sourcePath, `${targetPath}?static=${hash(source)}`)
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runHint(sourcePath, source);
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fs.writeFile(pj(buildDir, targetPath), source)
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}
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async function addSass(sourcePath, targetPath) {
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const renderedCSS = sass.renderSync({
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file: pj(".", sourcePath),
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outputStyle: "expanded",
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indentType: "tab",
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indentWidth: 1,
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functions: {
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"static($name)": function(name) {
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if (!(name instanceof sass.types.String)) {
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throw "$name: expected a string"
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}
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const result = static.get(name.getValue())
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if (typeof result === "string") {
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return new sass.types.String(result)
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} else {
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throw new Error("static file '"+name.getValue()+"' does not exist")
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}
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}
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}
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}).css
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static.set(sourcePath, `${targetPath}?static=${hash(renderedCSS)}`)
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validate(sourcePath, renderedCSS, "css")
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await fs.writeFile(pj(buildDir, targetPath), renderedCSS)
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}
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async function addPug(sourcePath, targetPath) {
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function getRelative(staticTarget) {
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const pathLayer = (path.dirname(targetPath).replace(/\/$/, "").match(/\//g) || []).length
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const prefix = Array(pathLayer).fill("../").join("")
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const result = prefix + staticTarget.replace(/^\//, "")
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if (result) return result
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else return "./"
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}
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function getStatic(target) {
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return getRelative(static.get(target))
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}
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function getStaticName(target) {
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return getRelative(static.get(target)).replace(/\?.*$/, "")
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}
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function getLink(target) {
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return getRelative(links.get(target))
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}
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const renderedHTML = pug.compileFile(pj(".", sourcePath), {pretty: true})({getStatic, getStaticName, getLink, ...pugLocals})
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let renderedWithoutPHP = renderedHTML.replace(/<\?(?:php|=).*?\?>/gsm, "")
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validate(sourcePath, renderedWithoutPHP, "html")
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await fs.writeFile(pj(buildDir, targetPath), renderedHTML)
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}
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async function addBabel(sourcePath, targetPath) {
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const originalCode = await fs.readFile(pj(".", sourcePath), "utf8")
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const compiled = babel.transformSync(originalCode, {
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sourceMaps: false,
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sourceType: "script",
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presets: [
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[
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"@babel/env", {
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targets: {
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"ie": 11
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}
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}
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]
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],
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generatorOpts: {
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comments: false,
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minified: false,
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sourceMaps: false,
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}
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})
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const filenameWithQuery = `${targetPath}?static=${hash(compiled.code)}`
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static.set(sourcePath, filenameWithQuery)
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await Promise.all([
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fs.writeFile(pj(buildDir, targetPath), originalCode),
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fs.writeFile(pj(buildDir, minFilename), compiled.code),
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fs.writeFile(pj(buildDir, mapFilename), JSON.stringify(compiled.map))
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])
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}
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;(async () => {
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// Stage 1: Register
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for (const item of spec) {
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if (item.type === "pug") {
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links.set(item.source, item.target.replace(/index.html$/, ""))
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}
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}
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// Stage 2: Build
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for (const item of spec) {
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if (item.type === "file") {
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await addFile(item.source, item.target)
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} else if (item.type === "js") {
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await addJS(item.source, item.target)
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} else if (item.type === "sass") {
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await addSass(item.source, item.target)
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} else if (item.type === "babel") {
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await addBabel(item.source, item.target)
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} else if (item.type === "pug") {
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await addPug(item.source, item.target)
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} else {
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throw new Error("Unknown item type: "+item.type)
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}
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}
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console.log(chalk.green("All files emitted."))
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await Promise.all(validationQueue).then(v => {
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console.log(`validation: using host ${chalk.cyan(validationHost)}`)
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v.forEach(cont => cont())
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})
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console.log(chalk.green("Build complete.") + "\n\n------------\n")
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})()
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