✨ Initial release

Releases the initial (`0.1.0`) version. Provides a basic implementation
that emits `.d.css.ts` files with named exports for the class names in
the files matching the given glob. Updates README with guidance. Adds
`glob` and `css-tree`.

README.md

@@ -2,6 +2,90 @@
 
 Basic TypeScript declaration generator for CSS files.
 
+## Install
+
+Install the CLI as a dev dependency.
+
+```shell
+npm install --save-dev css-typed
+```
+
+## Usage
+
+Run `css-typed` and pass it a glob targeting your CSS files.
+
+```shell
+npx css-typed 'src/**/*.css'
+```
+
+This will generate `.d.css.ts` files next to the original source files.
+
+> Note: A CSS module file with the name `foo.module.css` will
+> emit `foo.module.d.css.ts`
+
+## Configuration
+
+Configure TypeScript to allow arbitrary extensions (TS 5+).
+
+```json
+{
+	"compilerOptions": {
+		"allowArbitraryExtensions": true
+	}
+}
+```
+
+Add `*.d.css.ts` to your `.gitignore` if appropriate.
+
+```shell
+echo '*.d.css.ts' >> .gitignore
+```
+
+## Recipes
+
+### Run script
+
+To run it as part of your build, you will likely include it as a run script,
+maybe as `codegen` or `pretsc`.
+
+```json
+{
+	"scripts": {
+		"codegen": "css-typed 'src/**/*.css'",
+		"pretsc": "css-typed 'src/**/*.css'",
+		"tsc": "tsc"
+	}
+}
+```
+
+### Watch
+
+The CLI does not have built-in watch support. Feel free to [nodemon] or similar.
+
+```json
+{
+	"scripts": {
+		"codegen": "css-typed 'src/**/*.css'",
+		"codegen:watch": "nodemon -x 'npm run codegen' -w src -e css"
+	}
+}
+```
+
+[nodemon]: https://www.npmjs.com/package/nodemon
+
+## Details
+
+This (very basic) implementation uses [glob] for file matching and [css-tree]
+for CSS parsing. It extracts CSS classes (`ClassSelector` in CSS Tree’s AST) and
+exports them as `string` constants (named exports).
+
+I chose CSS Tree after a brief search because it had a nice API, good
+documentation, and supported CSS nesting (a requirement for my original use
+case).
+
+[glob]: https://www.npmjs.com/package/glob
+[css-tree]: https://www.npmjs.com/package/css-tree
+
 ## Motivation
 
 [typescript-plugin-css-modules] provides a great IDE experience, but cannot
@@ -24,10 +108,21 @@ appears [abandoned][174].
 
 Therefore, I wrote my own (very basic) implementation.
 
-<!-- prettier-ignore-start -->
 [typescript-plugin-css-modules]: https://www.npmjs.com/package/typescript-plugin-css-modules
 [typed-css-modules]: https://www.npmjs.com/package/typed-css-modules
 [typed-scss-modules]: https://www.npmjs.com/package/typed-scss-modules
 [css-modules-loader-core]: https://www.npmjs.com/package/css-modules-loader-core
 [174]: https://github.com/css-modules/css-modules-loader-core/issues/174
-<!-- prettier-ignore-end -->
+
+## Future
+
+This (very basic) implementation suited my immediate needs, but I see some
+improvements we could make. _All naming subject to bike shedding._
+
+- `ext`: Traditional (pre TS 5) extension naming with `*.css.d.ts`
+- `ignore`: Ignore support
+- `format`: Class name formatting
+  - (Related) Gracefully handle invalid names (example: kebab case)
+- `outDir`: Publish to a directory instead of next to the sources
+- `watch`: First-class watch mode
+- General CLI/UX improvements

main.js

@@ -0,0 +1,56 @@
+#!/usr/bin/env node
+
+import { existsSync } from "node:fs";
+import { readFile, writeFile } from "node:fs/promises";
+import { join, parse as parsePath } from "node:path";
+
+import { parse as parseCss, walk } from "css-tree";
+import { glob } from "glob";
+
+await main(process.argv[2]);
+
+async function main(pattern) {
+	if (!pattern) {
+		console.error(`Expected glob pattern`);
+		process.exit(2);
+	}
+
+	const files = await glob(pattern);
+
+	const time = new Date().toISOString();
+	const results = await Promise.all(
+		files.map((file) => generateDeclaration(file, time)),
+	);
+
+	const errors = results.filter(Boolean);
+	if (errors.length > 0) {
+		console.error(`Errors encountered`, errors);
+		process.exit(3);
+	}
+
+	process.exit(0);
+}
+
+async function generateDeclaration(path, time) {
+	// Handle case where the file got deleted by the time we got here
+	if (!existsSync(path)) return;
+
+	const css = await readFile(path, `utf8`);
+
+	let ts = `// Generated from ${path} by css-typed at ${time}\n\n`;
+
+	const ast = parseCss(css, { filename: path });
+	walk(ast, (node) => {
+		if (node.type === `ClassSelector`) {
+			ts += `export const ${node.name}: string;\n`;
+		}
+	});
+
+	await writeFile(dtsPath(path), ts, `utf8`);
+	return undefined;
+}
+
+function dtsPath(path) {
+	const { dir, name, ext } = parsePath(path);
+	return join(dir, `${name}.d${ext}.ts`);
+}

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "css-typed",
-	"version": "0.0.1",
+	"version": "0.1.0",
 	"description": "Basic TypeScript declaration generator for CSS files",
 	"keywords": [
 		"CSS",
@@ -23,6 +23,10 @@
 		"type": "git",
 		"url": "git+https://github.com/connorjs/css-typed.git"
 	},
+	"type": "module",
+	"bin": {
+		"css-typed": "main.js"
+	},
 	"scripts": {
 		"format": "prettier -l '**/*.{json,md}' --ignore-path .gitignore",
 		"prepare": "is-ci || husky install",
@@ -31,10 +35,17 @@
 	"lint-staged": {
 		"*.{json,md}": "prettier -w"
 	},
+	"dependencies": {
+		"css-tree": "^2.3.1",
+		"glob": "^9.3.2"
+	},
 	"devDependencies": {
 		"husky": "^8.0.3",
 		"is-ci": "^3.0.1",
 		"lint-staged": "^13.2.0",
 		"prettier": "^2.8.6"
+	},
+	"engines": {
+		"node": ">=14"
 	}
 }