From e82ba97a396e4e9d77486b48e6ee8b1dfd1c1b4c Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Mon, 24 Jul 2023 07:07:58 +0000
Subject: [PATCH] actually add processed tag to frontmatter

---
 quartz/build.ts |  171 ++++++++++++++++++++++++++++++++++++++++++++------------
 1 files changed, 134 insertions(+), 37 deletions(-)

diff --git a/quartz/build.ts b/quartz/build.ts
index 6926d68..b96c462 100644
--- a/quartz/build.ts
+++ b/quartz/build.ts
@@ -1,8 +1,8 @@
-import 'source-map-support/register.js'
+import "source-map-support/register.js"
 import path from "path"
 import { PerfTimer } from "./perf"
 import { rimraf } from "rimraf"
-import { globby } from "globby"
+import { globby, isGitIgnored } from "globby"
 import chalk from "chalk"
 import http from "http"
 import serveHandler from "serve-handler"
@@ -10,62 +10,159 @@
 import { filterContent } from "./processors/filter"
 import { emitContent } from "./processors/emit"
 import cfg from "../quartz.config"
-import { FilePath } from "./path"
+import { FilePath, slugifyFilePath } from "./path"
+import chokidar from "chokidar"
+import { ProcessedContent } from "./plugins/vfile"
+import WebSocket, { WebSocketServer } from "ws"
+import { Argv, BuildCtx } from "./ctx"
 
-interface Argv {
-  directory: string
-  verbose: boolean
-  output: string
-  serve: boolean
-  port: number
-}
+async function buildQuartz(argv: Argv, version: string) {
+  const ctx: BuildCtx = {
+    argv,
+    cfg,
+    allSlugs: [],
+  }
 
-export default async function buildQuartz(argv: Argv, version: string) {
   console.log(chalk.bgGreen.black(`\n Quartz v${version} \n`))
   const perf = new PerfTimer()
   const output = argv.output
 
   const pluginCount = Object.values(cfg.plugins).flat().length
-  const pluginNames = (key: 'transformers' | 'filters' | 'emitters') => cfg.plugins[key].map(plugin => plugin.name)
+  const pluginNames = (key: "transformers" | "filters" | "emitters") =>
+    cfg.plugins[key].map((plugin) => plugin.name)
   if (argv.verbose) {
     console.log(`Loaded ${pluginCount} plugins`)
-    console.log(`  Transformers: ${pluginNames('transformers').join(", ")}`)
-    console.log(`  Filters: ${pluginNames('filters').join(", ")}`)
-    console.log(`  Emitters: ${pluginNames('emitters').join(", ")}`)
+    console.log(`  Transformers: ${pluginNames("transformers").join(", ")}`)
+    console.log(`  Filters: ${pluginNames("filters").join(", ")}`)
+    console.log(`  Emitters: ${pluginNames("emitters").join(", ")}`)
   }
 
-  // clean
-  perf.addEvent('clean')
+  perf.addEvent("clean")
   await rimraf(output)
-  console.log(`Cleaned output directory \`${output}\` in ${perf.timeSince('clean')}`)
+  console.log(`Cleaned output directory \`${output}\` in ${perf.timeSince("clean")}`)
 
-  // glob
-  perf.addEvent('glob')
-  const fps = await globby('**/*.md', {
+  perf.addEvent("glob")
+  const fps = await globby("**/*.md", {
     cwd: argv.directory,
     ignore: cfg.configuration.ignorePatterns,
     gitignore: true,
   })
-  console.log(`Found ${fps.length} input files from \`${argv.directory}\` in ${perf.timeSince('glob')}`)
+  console.log(
+    `Found ${fps.length} input files from \`${argv.directory}\` in ${perf.timeSince("glob")}`,
+  )
 
-  const filePaths = fps.map(fp => `${argv.directory}${path.sep}${fp}` as FilePath)
-  const parsedFiles = await parseMarkdown(cfg.plugins.transformers, argv.directory, filePaths, argv.verbose)
-  const filteredContent = filterContent(cfg.plugins.filters, parsedFiles, argv.verbose)
-  await emitContent(argv.directory, output, cfg, filteredContent, argv.verbose)
+  const filePaths = fps.map((fp) => `${argv.directory}${path.sep}${fp}` as FilePath)
+  ctx.allSlugs = fps.map((fp) => slugifyFilePath(fp as FilePath))
+
+  const parsedFiles = await parseMarkdown(ctx, filePaths)
+  const filteredContent = filterContent(ctx, parsedFiles)
+  await emitContent(ctx, filteredContent)
   console.log(chalk.green(`Done processing ${fps.length} files in ${perf.timeSince()}`))
 
   if (argv.serve) {
-    const server = http.createServer(async (req, res) => {
-      await serveHandler(req, res, {
-        public: output,
-        directoryListing: false,
-      })
-      const status = res.statusCode
-      const statusString = status === 200 ? chalk.green(`[${status}]`) : chalk.red(`[${status}]`)
-      console.log(statusString + chalk.grey(` ${req.url}`))
+    await startServing(ctx, parsedFiles)
+  }
+}
+
+async function startServing(ctx: BuildCtx, initialContent: ProcessedContent[]) {
+  const { argv } = ctx
+  const wss = new WebSocketServer({ port: 3001 })
+  const connections: WebSocket[] = []
+  wss.on("connection", (ws) => connections.push(ws))
+
+  const ignored = await isGitIgnored()
+  const contentMap = new Map<FilePath, ProcessedContent>()
+  for (const content of initialContent) {
+    const [_tree, vfile] = content
+    contentMap.set(vfile.data.filePath!, content)
+  }
+
+  let timeoutId: ReturnType<typeof setTimeout> | null = null
+  let toRebuild: Set<FilePath> = new Set()
+  let toRemove: Set<FilePath> = new Set()
+  async function rebuild(fp: string, action: "add" | "change" | "delete") {
+    if (!ignored(fp)) {
+      const filePath = `${argv.directory}${path.sep}${fp}` as FilePath
+      if (action === "add" || action === "change") {
+        toRebuild.add(filePath)
+      } else if (action === "delete") {
+        toRemove.add(filePath)
+      }
+
+      if (timeoutId) {
+        clearTimeout(timeoutId)
+      }
+
+      timeoutId = setTimeout(async () => {
+        const perf = new PerfTimer()
+        console.log(chalk.yellow("Detected change, rebuilding..."))
+        try {
+          const filesToRebuild = [...toRebuild].filter((fp) => !toRemove.has(fp))
+
+          ctx.allSlugs = [...new Set([...contentMap.keys(), ...toRebuild])]
+            .filter((fp) => !toRemove.has(fp))
+            .map((fp) => slugifyFilePath(path.relative(argv.directory, fp) as FilePath))
+
+          const parsedContent = await parseMarkdown(ctx, filesToRebuild)
+          for (const content of parsedContent) {
+            const [_tree, vfile] = content
+            contentMap.set(vfile.data.filePath!, content)
+          }
+
+          for (const fp of toRemove) {
+            contentMap.delete(fp)
+          }
+
+          await rimraf(argv.output)
+          const parsedFiles = [...contentMap.values()]
+          const filteredContent = filterContent(ctx, parsedFiles)
+          await emitContent(ctx, filteredContent)
+          console.log(chalk.green(`Done rebuilding in ${perf.timeSince()}`))
+        } catch {
+          console.log(chalk.yellow(`Rebuild failed. Waiting on a change to fix the error...`))
+        }
+        connections.forEach((conn) => conn.send("rebuild"))
+        toRebuild.clear()
+        toRemove.clear()
+      }, 250)
+    }
+  }
+
+  const watcher = chokidar.watch(".", {
+    persistent: true,
+    cwd: argv.directory,
+    ignoreInitial: true,
+  })
+
+  watcher
+    .on("add", (fp) => rebuild(fp, "add"))
+    .on("change", (fp) => rebuild(fp, "change"))
+    .on("unlink", (fp) => rebuild(fp, "delete"))
+
+  const server = http.createServer(async (req, res) => {
+    await serveHandler(req, res, {
+      public: argv.output,
+      directoryListing: false,
     })
-    server.listen(argv.port)
-    console.log(chalk.cyan(`Started a Quartz server listening at http://localhost:${argv.port}`))
-    console.log('hint: exit with ctrl+c')
+    const status = res.statusCode
+    const statusString =
+      status >= 200 && status < 300
+        ? chalk.green(`[${status}]`)
+        : status >= 300 && status < 400
+        ? chalk.yellow(`[${status}]`)
+        : chalk.red(`[${status}]`)
+    console.log(statusString + chalk.grey(` ${req.url}`))
+  })
+  server.listen(argv.port)
+  console.log(chalk.cyan(`Started a Quartz server listening at http://localhost:${argv.port}`))
+  console.log("hint: exit with ctrl+c")
+}
+
+export default async (argv: Argv, version: string) => {
+  try {
+    await buildQuartz(argv, version)
+  } catch {
+    console.log(chalk.red("\nExiting Quartz due to a fatal error"))
+    process.exit(1)
   }
 }

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