chore(scripts): split downlevel-dts to multiple files

Author: trivikr

scripts/downlevel-dts/downlevelWorkspace.mjs

@@ -1,29 +1,20 @@
+// @ts-check
 import { exec } from "child_process";
 import { access, readFile, writeFile } from "fs/promises";
 import { join } from "path";
 import stripComments from "strip-comments";
 import { promisify } from "util";
 
+import { getAllFiles } from "./getAllFiles.mjs";
+import { getDeclarationDirname } from "./getDeclarationDirname.mjs";
+import { getDownlevelDirname } from "./getDownlevelDirname.mjs";
+
 const execPromise = promisify(exec);
 
 export const downlevelWorkspace = async (workspacesDir, workspaceName) => {
   const workspaceDir = join(workspacesDir, workspaceName);
-
-  const packageJsonPath = join(workspaceDir, "package.json");
-  const packageJson = JSON.parse((await readFile(packageJsonPath)).toString());
-  if (!packageJson.scripts["downlevel-dts"]) {
-    console.error(`The "downlevel-dts" script is not defined for "${workspaceDir}"`);
-    return;
-  }
-  const downlevelArgs = packageJson.scripts["downlevel-dts"].split(" ");
-  const downlevelDirname = downlevelArgs[2].replace(`${downlevelArgs[1]}/`, "");
-
-  const tsTypesConfigPath = join(workspaceDir, "tsconfig.types.json");
-  const declarationDirname = JSON.parse((await readFile(tsTypesConfigPath)).toString()).compilerOptions.declarationDir;
-
-  if (!declarationDirname) {
-    throw new Error(`The declarationDir is not defined in "${tsTypesConfigPath}".`);
-  }
+  const downlevelDirname = await getDownlevelDirname(workspaceDir);
+  const declarationDirname = await getDeclarationDirname(workspaceDir);
 
   const declarationDir = join(workspaceDir, declarationDirname);
   try {

scripts/downlevel-dts/getAllFiles.mjs

@@ -0,0 +1,16 @@
+import { readdirSync, statSync } from "fs";
+
+export const getAllFiles = (dirPath, arrayOfFiles = []) => {
+  const files = readdirSync(dirPath);
+
+  files.forEach((file) => {
+    const { isDirectory } = statSync(dirPath + "/" + file);
+    if (isDirectory()) {
+      arrayOfFiles = getAllFiles(dirPath + "/" + file, arrayOfFiles);
+    } else {
+      arrayOfFiles.push(join(dirPath, "/", file));
+    }
+  });
+
+  return arrayOfFiles;
+};

scripts/downlevel-dts/getDeclarationDirname.mjs

@@ -0,0 +1,14 @@
+import { readFile } from "fs/promises";
+import { join } from "path";
+
+export const getDeclarationDirname = async (workspaceDir) => {
+  const tsTypesConfigPath = join(workspaceDir, "tsconfig.types.json");
+  const tsTypesConfigJson = JSON.parse((await readFile(tsTypesConfigPath)).toString());
+
+  const declarationDirname = tsTypesConfigJson.compilerOptions.declarationDir;
+  if (!declarationDirname) {
+    throw new Error(`The declarationDir is not defined in "${tsTypesConfigPath}".`);
+  }
+
+  return declarationDirname;
+};

scripts/downlevel-dts/getDownlevelDirname.mjs

@@ -0,0 +1,13 @@
+import { readFile } from "fs/promises";
+import { join } from "path";
+
+export const getDownlevelDirname = async (workspaceDir) => {
+  const packageJsonPath = join(workspaceDir, "package.json");
+  const packageJson = JSON.parse((await readFile(packageJsonPath)).toString());
+  if (!packageJson.scripts["downlevel-dts"]) {
+    console.error(`The "downlevel-dts" script is not defined for "${workspaceDir}"`);
+    return;
+  }
+  const downlevelArgs = packageJson.scripts["downlevel-dts"].split(" ");
+  return downlevelArgs[2].replace(`${downlevelArgs[1]}/`, "");
+};

scripts/downlevel-dts/getWorkspaces.mjs

@@ -0,0 +1,13 @@
+import { readdirSync, readFileSync } from "fs";
+import { join } from "path";
+
+export const getWorkspaces = (rootDir) => {
+  const { packages } = JSON.parse(readFileSync(join(rootDir, "package.json")).toString()).workspaces;
+  return packages
+    .map((dir) => dir.replace("/*", ""))
+    .flatMap((workspacesDir) =>
+      readdirSync(join(rootDir, workspacesDir), { withFileTypes: true })
+        .filter((dirent) => dirent.isDirectory())
+        .map((dirent) => ({ workspacesDir, workspaceName: dirent.name }))
+    );
+};

scripts/downlevel-dts/index.mjs

@@ -1,11 +1,10 @@
 // @ts-check
 import parallelLimit from "async/parallelLimit";
-import { readdirSync, readFileSync, statSync } from "fs";
 import { cpus } from "os";
-import { join } from "path";
 import yargs from "yargs";
 
 import { downlevelWorkspace } from "./downlevelWorkspace.mjs";
+import { getWorkspaces } from "./getWorkspaces.mjs";
 
 // ToDo: Write downlevel-dts as a yargs command, and import yargs in scripts instead.
 yargs
@@ -17,30 +16,7 @@ yargs
   .help()
   .alias("h", "help").argv;
 
-const { packages } = JSON.parse(readFileSync(join(process.cwd(), "package.json")).toString()).workspaces;
-
-const getAllFiles = (dirPath, arrayOfFiles = []) => {
-  const files = readdirSync(dirPath);
-
-  files.forEach((file) => {
-    if (statSync(dirPath + "/" + file).isDirectory()) {
-      arrayOfFiles = getAllFiles(dirPath + "/" + file, arrayOfFiles);
-    } else {
-      arrayOfFiles.push(join(dirPath, "/", file));
-    }
-  });
-
-  return arrayOfFiles;
-};
-
-const workspaces = packages
-  .map((dir) => dir.replace("/*", ""))
-  .flatMap((workspacesDir) =>
-    readdirSync(join(process.cwd(), workspacesDir), { withFileTypes: true })
-      .filter((dirent) => dirent.isDirectory())
-      .map((dirent) => ({ workspacesDir, workspaceName: dirent.name }))
-  );
-
+const workspaces = getWorkspaces(process.cwd());
 const tasks = workspaces.map(({ workspacesDir, workspaceName }) => async () => {
   await downlevelWorkspace(workspacesDir, workspaceName);
 });