add hw2

node_modules/sucrase/dist/esm/cli.js

@@ -0,0 +1,317 @@
+/* eslint-disable no-console */
+import commander from "commander";
+import {glob} from "glob";
+import {exists, mkdir, readdir, readFile, stat, writeFile} from "mz/fs";
+import {dirname, join, relative} from "path";
+
+import { transform} from "./index";
+
+
+
+
+
+
+
+
+
+
+
+export default function run() {
+  commander
+    .description(`Sucrase: super-fast Babel alternative.`)
+    .usage("[options] <srcDir>")
+    .option(
+      "-d, --out-dir <out>",
+      "Compile an input directory of modules into an output directory.",
+    )
+    .option(
+      "-p, --project <dir>",
+      "Compile a TypeScript project, will read from tsconfig.json in <dir>",
+    )
+    .option("--out-extension <extension>", "File extension to use for all output files.", "js")
+    .option("--exclude-dirs <paths>", "Names of directories that should not be traversed.")
+    .option("-q, --quiet", "Don't print the names of converted files.")
+    .option("-t, --transforms <transforms>", "Comma-separated list of transforms to run.")
+    .option("--disable-es-transforms", "Opt out of all ES syntax transforms.")
+    .option("--jsx-runtime <string>", "Transformation mode for the JSX transform.")
+    .option("--production", "Disable debugging information from JSX in output.")
+    .option(
+      "--jsx-import-source <string>",
+      "Automatic JSX transform import path prefix, defaults to `React.Fragment`.",
+    )
+    .option(
+      "--jsx-pragma <string>",
+      "Classic JSX transform element creation function, defaults to `React.createElement`.",
+    )
+    .option(
+      "--jsx-fragment-pragma <string>",
+      "Classic JSX transform fragment component, defaults to `React.Fragment`.",
+    )
+    .option("--keep-unused-imports", "Disable automatic removal of type-only imports/exports.")
+    .option("--preserve-dynamic-import", "Don't transpile dynamic import() to require.")
+    .option(
+      "--inject-create-require-for-import-require",
+      "Use `createRequire` when transpiling TS `import = require` to ESM.",
+    )
+    .option(
+      "--enable-legacy-typescript-module-interop",
+      "Use default TypeScript ESM/CJS interop strategy.",
+    )
+    .option("--enable-legacy-babel5-module-interop", "Use Babel 5 ESM/CJS interop strategy.")
+    .parse(process.argv);
+
+  if (commander.project) {
+    if (
+      commander.outDir ||
+      commander.transforms ||
+      commander.args[0] ||
+      commander.enableLegacyTypescriptModuleInterop
+    ) {
+      console.error(
+        "If TypeScript project is specified, out directory, transforms, source " +
+          "directory, and --enable-legacy-typescript-module-interop may not be specified.",
+      );
+      process.exit(1);
+    }
+  } else {
+    if (!commander.outDir) {
+      console.error("Out directory is required");
+      process.exit(1);
+    }
+
+    if (!commander.transforms) {
+      console.error("Transforms option is required.");
+      process.exit(1);
+    }
+
+    if (!commander.args[0]) {
+      console.error("Source directory is required.");
+      process.exit(1);
+    }
+  }
+
+  const options = {
+    outDirPath: commander.outDir,
+    srcDirPath: commander.args[0],
+    project: commander.project,
+    outExtension: commander.outExtension,
+    excludeDirs: commander.excludeDirs ? commander.excludeDirs.split(",") : [],
+    quiet: commander.quiet,
+    sucraseOptions: {
+      transforms: commander.transforms ? commander.transforms.split(",") : [],
+      disableESTransforms: commander.disableEsTransforms,
+      jsxRuntime: commander.jsxRuntime,
+      production: commander.production,
+      jsxImportSource: commander.jsxImportSource,
+      jsxPragma: commander.jsxPragma || "React.createElement",
+      jsxFragmentPragma: commander.jsxFragmentPragma || "React.Fragment",
+      keepUnusedImports: commander.keepUnusedImports,
+      preserveDynamicImport: commander.preserveDynamicImport,
+      injectCreateRequireForImportRequire: commander.injectCreateRequireForImportRequire,
+      enableLegacyTypeScriptModuleInterop: commander.enableLegacyTypescriptModuleInterop,
+      enableLegacyBabel5ModuleInterop: commander.enableLegacyBabel5ModuleInterop,
+    },
+  };
+
+  buildDirectory(options).catch((e) => {
+    process.exitCode = 1;
+    console.error(e);
+  });
+}
+
+
+
+
+
+
+async function findFiles(options) {
+  const outDirPath = options.outDirPath;
+  const srcDirPath = options.srcDirPath;
+
+  const extensions = options.sucraseOptions.transforms.includes("typescript")
+    ? [".ts", ".tsx"]
+    : [".js", ".jsx"];
+
+  if (!(await exists(outDirPath))) {
+    await mkdir(outDirPath);
+  }
+
+  const outArr = [];
+  for (const child of await readdir(srcDirPath)) {
+    if (["node_modules", ".git"].includes(child) || options.excludeDirs.includes(child)) {
+      continue;
+    }
+    const srcChildPath = join(srcDirPath, child);
+    const outChildPath = join(outDirPath, child);
+    if ((await stat(srcChildPath)).isDirectory()) {
+      const innerOptions = {...options};
+      innerOptions.srcDirPath = srcChildPath;
+      innerOptions.outDirPath = outChildPath;
+      const innerFiles = await findFiles(innerOptions);
+      outArr.push(...innerFiles);
+    } else if (extensions.some((ext) => srcChildPath.endsWith(ext))) {
+      const outPath = outChildPath.replace(/\.\w+$/, `.${options.outExtension}`);
+      outArr.push({
+        srcPath: srcChildPath,
+        outPath,
+      });
+    }
+  }
+
+  return outArr;
+}
+
+async function runGlob(options) {
+  const tsConfigPath = join(options.project, "tsconfig.json");
+
+  let str;
+  try {
+    str = await readFile(tsConfigPath, "utf8");
+  } catch (err) {
+    console.error("Could not find project tsconfig.json");
+    console.error(`  --project=${options.project}`);
+    console.error(err);
+    process.exit(1);
+  }
+  const json = JSON.parse(str);
+
+  const foundFiles = [];
+
+  const files = json.files;
+  const include = json.include;
+
+  const absProject = join(process.cwd(), options.project);
+  const outDirs = [];
+
+  if (!(await exists(options.outDirPath))) {
+    await mkdir(options.outDirPath);
+  }
+
+  if (files) {
+    for (const file of files) {
+      if (file.endsWith(".d.ts")) {
+        continue;
+      }
+      if (!file.endsWith(".ts") && !file.endsWith(".js")) {
+        continue;
+      }
+
+      const srcFile = join(absProject, file);
+      const outFile = join(options.outDirPath, file);
+      const outPath = outFile.replace(/\.\w+$/, `.${options.outExtension}`);
+
+      const outDir = dirname(outPath);
+      if (!outDirs.includes(outDir)) {
+        outDirs.push(outDir);
+      }
+
+      foundFiles.push({
+        srcPath: srcFile,
+        outPath,
+      });
+    }
+  }
+  if (include) {
+    for (const pattern of include) {
+      const globFiles = await glob(join(absProject, pattern));
+      for (const file of globFiles) {
+        if (!file.endsWith(".ts") && !file.endsWith(".js")) {
+          continue;
+        }
+        if (file.endsWith(".d.ts")) {
+          continue;
+        }
+
+        const relativeFile = relative(absProject, file);
+        const outFile = join(options.outDirPath, relativeFile);
+        const outPath = outFile.replace(/\.\w+$/, `.${options.outExtension}`);
+
+        const outDir = dirname(outPath);
+        if (!outDirs.includes(outDir)) {
+          outDirs.push(outDir);
+        }
+
+        foundFiles.push({
+          srcPath: file,
+          outPath,
+        });
+      }
+    }
+  }
+
+  for (const outDirPath of outDirs) {
+    if (!(await exists(outDirPath))) {
+      await mkdir(outDirPath);
+    }
+  }
+
+  // TODO: read exclude
+
+  return foundFiles;
+}
+
+async function updateOptionsFromProject(options) {
+  /**
+   * Read the project information and assign the following.
+   *  - outDirPath
+   *  - transform: imports
+   *  - transform: typescript
+   *  - enableLegacyTypescriptModuleInterop: true/false.
+   */
+
+  const tsConfigPath = join(options.project, "tsconfig.json");
+
+  let str;
+  try {
+    str = await readFile(tsConfigPath, "utf8");
+  } catch (err) {
+    console.error("Could not find project tsconfig.json");
+    console.error(`  --project=${options.project}`);
+    console.error(err);
+    process.exit(1);
+  }
+  const json = JSON.parse(str);
+  const sucraseOpts = options.sucraseOptions;
+  if (!sucraseOpts.transforms.includes("typescript")) {
+    sucraseOpts.transforms.push("typescript");
+  }
+
+  const compilerOpts = json.compilerOptions;
+  if (compilerOpts.outDir) {
+    options.outDirPath = join(process.cwd(), options.project, compilerOpts.outDir);
+  }
+  if (compilerOpts.esModuleInterop !== true) {
+    sucraseOpts.enableLegacyTypeScriptModuleInterop = true;
+  }
+  if (compilerOpts.module === "commonjs") {
+    if (!sucraseOpts.transforms.includes("imports")) {
+      sucraseOpts.transforms.push("imports");
+    }
+  }
+}
+
+async function buildDirectory(options) {
+  let files;
+  if (options.outDirPath && options.srcDirPath) {
+    files = await findFiles(options);
+  } else if (options.project) {
+    await updateOptionsFromProject(options);
+    files = await runGlob(options);
+  } else {
+    console.error("Project or Source directory required.");
+    process.exit(1);
+  }
+
+  for (const file of files) {
+    await buildFile(file.srcPath, file.outPath, options);
+  }
+}
+
+async function buildFile(srcPath, outPath, options) {
+  if (!options.quiet) {
+    console.log(`${srcPath} -> ${outPath}`);
+  }
+  const code = (await readFile(srcPath)).toString();
+  const transformedCode = transform(code, {...options.sucraseOptions, filePath: srcPath}).code;
+  await writeFile(outPath, transformedCode);
+}