feat(yarn): try to add list of ignore files from Yarn for ESLint and Prettier

Author: hckhanh

src/actions/CreateFileAction.ts

@@ -1,12 +1,19 @@
-import { withCurrentDir, writeContentToFile } from "../process";
+import { getFileStats, withCurrentDir, writeContentToFile } from "../process";
 import { Action } from "./Action";
 
 export class CreateFileAction extends Action {
-  constructor(private fileName: string, private content: string) {
+  constructor(private fileName: string, private content: string, private tryUpdateOnly = false) {
     super();
   }
 
   async exec(): Promise<void> {
-    await writeContentToFile(withCurrentDir(this.fileName), this.content);
+    const filePath = withCurrentDir(this.fileName);
+
+    if (this.tryUpdateOnly) {
+      const stats = await getFileStats(filePath);
+      stats && stats.isFile() && (await writeContentToFile(filePath, this.content, "a"));
+    } else {
+      await writeContentToFile(filePath, this.content);
+    }
   }
 }

src/configs.ts

@@ -31,16 +31,18 @@ export const eslintBaseConfigs = {
   rules: {},
 };
 
+export const ignoreYarn2 = `
+# Yarn
+.yarn
+.pnp.*
+`;
+
 export const ignoreFiles = `
 # Builds
 lib
 dist
 build
 
-# Yarn
-.yarn
-.pnp.*
-
 # Test
 coverage
 

src/generators/Yarn2Generator.ts

@@ -1,5 +1,7 @@
 import { Action } from "../actions/Action";
+import { CreateFileAction } from "../actions/CreateFileAction";
 import { CreateYarn2ConfigsAction } from "../actions/CreateYarn2ConfigsAction";
+import { ignoreYarn2 } from "../configs";
 import { Formatter } from "../formatters/Formatter";
 import { InquirerConfigs } from "../types";
 import { Generator } from "./Generator";
@@ -15,6 +17,10 @@ export class Yarn2Generator extends Generator {
     userConfigs: InquirerConfigs,
     formatter: Formatter,
   ): Action[] {
-    return [new CreateYarn2ConfigsAction(userConfigs)];
+    return [
+      new CreateYarn2ConfigsAction(userConfigs),
+      new CreateFileAction(".eslintignore", ignoreYarn2, true),
+      new CreateFileAction(".prettierignore", ignoreYarn2, true),
+    ];
   }
 }

src/process.ts

@@ -60,7 +60,7 @@ export async function getFileStats(file: string): Promise<Stats | undefined> {
   }
 }
 
-export async function writeContentToFile(file: string, content: string, flag = "a+") {
+export async function writeContentToFile(file: string, content: string, flag = "a") {
   const stats = await getFileStats(file);
 
   if (stats) {