[dx] Allow vscode to search inside md files by default (#3105)

Before this PR all .md files were targeted by the `.ignore` file, which
has bitten me on a number of occasions since .md files often contain
valuable information (e.g. the vscode extensions docs). This PR
unignores .md files while still ignoring _generated_ .md files like our
changelogs, the api-report files, and the generated docs sections.

Additionally, the `yarn format` and `yarn lint` commands were configured
slightly differently, which was confusing, so I've unified those and
simplified the lint.ts script at the same time.

### Change Type

- [ ] `patch` — Bug fix
- [ ] `minor` — New feature
- [ ] `major` — Breaking change
- [ ] `dependencies` — Changes to package dependencies[^1]
- [ ] `documentation` — Changes to the documentation only[^2]
- [ ] `tests` — Changes to any test code only[^2]
- [x] `internal` — Any other changes that don't affect the published
package[^2]
- [ ] I don't know

[^1]: publishes a `patch` release, for devDependencies use `internal`
[^2]: will not publish a new version

scripts/lint.ts

@@ -1,70 +1,26 @@
-import ignore from 'ignore'
 import * as path from 'path'
 import { exec } from './lib/exec'
-import { REPO_ROOT, readFileIfExists } from './lib/file'
-
-const ESLINT_EXTENSIONS = ['js', 'jsx', 'ts', 'tsx']
-const PRETTIER_EXTENSIONS = ['js', 'jsx', 'ts', 'tsx', 'json']
+import { REPO_ROOT } from './lib/file'
 
 async function main() {
 	const shouldFix = process.argv.includes('--fix')
-
-	const lsFiles = await exec('git', ['ls-files', '.'], {
-		processStdoutLine: () => {
-			// don't print anything
-		},
-	})
-
-	const filesByExtension = new Map<string, string[]>()
-	for (const file of lsFiles.trim().split('\n')) {
-		const ext = file.split('.').pop()
-		if (!ext) continue
-		let files = filesByExtension.get(ext)
-		if (!files) {
-			files = []
-			filesByExtension.set(ext.toLowerCase(), files)
-		}
-		files.push(file)
-	}
-
-	let prettierFiles = PRETTIER_EXTENSIONS.flatMap((ext) => filesByExtension.get(ext) ?? [])
-	let eslintFiles = ESLINT_EXTENSIONS.flatMap((ext) => filesByExtension.get(ext) ?? [])
-
 	const relativeCwd = path.relative(REPO_ROOT, process.cwd())
 
-	const prettierIgnoreFile = await readFileIfExists(path.join(REPO_ROOT, '.prettierignore'))
-	if (prettierIgnoreFile) {
-		prettierFiles = prettierFiles
-			.map((f) => path.join(relativeCwd, f))
-			.filter(ignore().add(prettierIgnoreFile).createFilter())
-			.map((f) => path.relative(relativeCwd, f))
-	}
-
-	const eslintIgnoreFile = await readFileIfExists(path.join(REPO_ROOT, '.eslintignore'))
-	if (eslintIgnoreFile) {
-		eslintFiles = eslintFiles
-			.map((f) => path.join(relativeCwd, f))
-			.filter(ignore().add(eslintIgnoreFile).createFilter())
-			.map((f) => path.relative(relativeCwd, f))
-	}
-
 	try {
-		await exec('yarn', [
-			'run',
-			'-T',
-			'prettier',
-			shouldFix ? '--write' : '--check',
-			'--cache',
-			...prettierFiles,
-		])
-		await exec('yarn', [
-			'run',
-			'-T',
-			'eslint',
-			'--report-unused-disable-directives',
-			shouldFix ? '--fix' : null,
-			...eslintFiles,
-		])
+		await exec('yarn', ['prettier', shouldFix ? '--write' : '--check', '--cache', relativeCwd], {
+			pwd: REPO_ROOT,
+		})
+		await exec(
+			'yarn',
+			[
+				'eslint',
+				'--report-unused-disable-directives',
+				'--no-error-on-unmatched-pattern',
+				shouldFix ? '--fix' : null,
+				relativeCwd,
+			],
+			{ pwd: REPO_ROOT }
+		)
 	} catch (error) {
 		process.exit(1)
 	}