fix: configure eslint and jest to ignore output directory

Author: satya164

README.md

@@ -68,13 +68,19 @@ To configure your project manually, follow these steps:
    ]
    ```
 
-1. Add the output directory to `.gitignore`
+1. Add the output directory to `.gitignore` and `.eslintignore`
 
    ```gitignore
    # generated files by bob
    lib/
    ```
 
+1. Add the output directory to `jest.modulePathIgnorePatterns` if you use [Jest](https://jestjs.io)
+
+   ```json
+   "modulePathIgnorePatterns": ["<rootDir>/lib/"]
+   ```
+
 And we're done 🎉
 
 ## LICENSE

src/cli.ts

@@ -192,18 +192,37 @@ yargs
       }),
     };
 
+    if (pkg.jest) {
+      const entry = `<rootDir>/${output}/`;
+
+      if (pkg.jest.modulePathIgnorePatterns) {
+        const { modulePathIgnorePatterns } = pkg.jest;
+
+        if (!modulePathIgnorePatterns.includes(entry)) {
+          modulePathIgnorePatterns.push(entry);
+        }
+      } else {
+        pkg.jest.modulePathIgnorePatterns = [entry];
+      }
+    }
+
     await fs.writeFile(pak, JSON.stringify(pkg, null, 2));
 
-    const gitignore = path.join(root, '.gitignore');
+    const ignorefiles = [
+      path.join(root, '.gitignore'),
+      path.join(root, '.eslintignore'),
+    ];
 
-    if (await fs.pathExists(gitignore)) {
-      const content = await fs.readFile(gitignore, 'utf-8');
+    for (const ignorefile of ignorefiles) {
+      if (await fs.pathExists(ignorefile)) {
+        const content = await fs.readFile(ignorefile, 'utf-8');
 
-      if (!content.split('\n').includes(`${output}/`)) {
-        await fs.writeFile(
-          gitignore,
-          `${content}\n# generated by bob\n${output}/\n`
-        );
+        if (!content.split('\n').includes(`${output}/`)) {
+          await fs.writeFile(
+            ignorefile,
+            `${content}\n# generated by bob\n${output}/\n`
+          );
+        }
       }
     }
 

src/targets/commonjs.ts

@@ -1,3 +1,5 @@
+import path from 'path';
+import chalk from 'chalk';
 import del from 'del';
 import compile from '../utils/compile';
 import { Input } from '../types';
@@ -13,7 +15,7 @@ export default async function build({
   options,
   report
 }: Options) {
-  report.info('Cleaning up previous build');
+  report.info(`Cleaning up previous build at ${chalk.blue(path.relative(root, output))}`);
 
   await del([output]);
 

src/targets/module.ts

@@ -1,3 +1,5 @@
+import path from 'path';
+import chalk from 'chalk';
 import del from 'del';
 import compile from '../utils/compile';
 import { Input } from '../types';
@@ -13,7 +15,7 @@ export default async function build({
   options,
   report
 }: Options) {
-  report.info('Cleaning up previous build');
+  report.info(`Cleaning up previous build at ${chalk.blue(path.relative(root, output))}`);
 
   await del([output]);
 

src/targets/typescript.ts

@@ -6,7 +6,7 @@ import del from 'del';
 import { Input } from '../types';
 
 export default async function build({ root, output, report }: Input) {
-  report.info('Cleaning up previous build');
+  report.info(`Cleaning up previous build at ${chalk.blue(path.relative(root, output))}`);
 
   await del([output]);