Add Sprinkles (#53)

.changeset/lovely-tigers-applaud.md

@@ -0,0 +1,6 @@
+---
+'@vanilla-extract/esbuild-plugin': minor
+'@vanilla-extract/webpack-plugin': minor
+---
+
+Support exporting functions from `.css.ts` files via recipes

.gitignore

@@ -3,6 +3,8 @@ dist
 tsconfig.tsbuildinfo
 yarn-error.log
 packages/**/README.md
+!packages/sprinkles/README.md
+
 
 .yarn/*
 !.yarn/patches

README.md

@@ -76,6 +76,10 @@ document.write(`
 
 ---
 
+Want to work at a higher level while maximising style re-use? Check out  🍨 [Sprinkles](https://github.com/seek-oss/vanilla-extract/tree/master/packages/sprinkles), our official zero-runtime atomic CSS framework, built on top of vanilla-extract.
+
+---
+
 - [Setup](#setup)
   - [webpack](#webpack)
   - [esbuild](#esbuild)
@@ -115,7 +119,7 @@ There are currently a few integrations to choose from.
 1. Install the dependencies.
 
 ```bash
-$ yarn add --dev @vanilla-extract/css @vanilla-extract/babel-plugin @vanilla-extract/webpack-plugin
+$ npm install @vanilla-extract/css @vanilla-extract/babel-plugin @vanilla-extract/webpack-plugin
 ```
 
 2. Add the [Babel](https://babeljs.io) plugin.
@@ -171,7 +175,7 @@ module.exports = {
 1. Install the dependencies.
 
 ```bash
-$ yarn add --dev @vanilla-extract/css @vanilla-extract/esbuild-plugin
+$ npm install @vanilla-extract/css @vanilla-extract/esbuild-plugin
 ```
 
 2. Add the [esbuild](https://esbuild.github.io/) plugin to your build script.
@@ -620,7 +624,7 @@ export const green = composeStyles(base, style({
 We also provide a lightweight standalone package to support dynamic runtime theming.
 
 ```bash
-$ yarn add --dev @vanilla-extract/dynamic
+$ npm install @vanilla-extract/dynamic
 ```
 
 ### createInlineTheme
@@ -681,7 +685,7 @@ We also provide a standalone package of optional utility functions to make it ea
 > 💡 This package can be used with any CSS-in-JS library.
 
 ```bash
-$ yarn add --dev @vanilla-extract/css-utils
+$ npm install @vanilla-extract/css-utils
 ```
 
 ### calc

fixtures/sprinkles/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "@fixtures/sprinkles",
+  "version": "0.0.0",
+  "main": "src/index.ts",
+  "sideEffects": true,
+  "author": "SEEK",
+  "private": true,
+  "dependencies": {
+    "@vanilla-extract/css": "0.3.2",
+    "@vanilla-extract/sprinkles": "0.1.0"
+  }
+}

fixtures/sprinkles/src/index.ts

@@ -0,0 +1,18 @@
+import { atoms } from './styles.css';
+import testNodes from '../test-nodes.json';
+
+function render() {
+  document.body.innerHTML = `
+  <div id="${testNodes.root}" class="${atoms({
+    display: 'block',
+    paddingTop: {
+      mobile: 'small',
+      desktop: 'medium',
+    },
+  })}"> 
+    Sprinkles
+  </div>
+`;
+}
+
+render();

fixtures/sprinkles/src/styles.css.ts

@@ -0,0 +1,28 @@
+import { createAtomicStyles, createAtomsFn } from '@vanilla-extract/sprinkles';
+
+export const atoms = createAtomsFn(
+  createAtomicStyles({
+    defaultCondition: 'mobile',
+    conditions: {
+      mobile: {},
+      tablet: {
+        '@media': 'screen and (min-width: 768px)',
+      },
+      desktop: {
+        '@media': 'screen and (min-width: 1024px)',
+      },
+      darkDesktop: {
+        '@supports': 'not (display: grid)',
+        '@media': 'screen and (min-width: 1024px)',
+        selector: '[data-dark-mode] &',
+      },
+    },
+    properties: {
+      display: ['flex', 'none', 'block'],
+      paddingTop: {
+        small: '10px',
+        medium: '20px',
+      },
+    },
+  }),
+);

fixtures/sprinkles/test-nodes.json

@@ -0,0 +1,3 @@
+{
+  "root": "root"
+}

packages/esbuild-plugin/src/index.ts

@@ -11,6 +11,10 @@ import { build as esbuild, Plugin } from 'esbuild';
 import evalCode from 'eval';
 import { stringify } from 'javascript-stringify';
 import isPlainObject from 'lodash/isPlainObject';
+import crypto from 'crypto';
+
+const hash = (value: string) =>
+  crypto.createHash('md5').update(value).digest('hex');
 
 const vanillaCssNamespace = 'vanilla-extract-css-ns';
 
@@ -192,7 +196,7 @@ export function vanillaExtractPlugin({
   };
 }
 
-const stringifyExports = (value: any) =>
+const stringifyExports = (recipeImports: Set<string>, value: any): any =>
   stringify(
     value,
     (value, _indent, next) => {
@@ -208,6 +212,37 @@ const stringifyExports = (value: any) =>
         return next(value);
       }
 
+      if (valueType === 'function' && value.__recipe__) {
+        const { importPath, importName, args } = value.__recipe__;
+
+        if (
+          typeof importPath !== 'string' ||
+          typeof importName !== 'string' ||
+          !Array.isArray(args)
+        ) {
+          throw new Error('Invalid recipe');
+        }
+
+        try {
+          const hashedImportName = `_${hash(`${importName}${importPath}`).slice(
+            0,
+            5,
+          )}`;
+
+          recipeImports.add(
+            `import { ${importName} as ${hashedImportName} } from '${importPath}';`,
+          );
+
+          return `${hashedImportName}(${args
+            .map((arg) => stringifyExports(recipeImports, arg))
+            .join(',')})`;
+        } catch (err) {
+          console.error(err);
+
+          throw new Error('Invalid recipe.');
+        }
+      }
+
       throw new Error(dedent`
         Invalid exports.
 
@@ -230,13 +265,15 @@ const serializeVanillaModule = (
     return `import '${request}';`;
   });
 
+  const recipeImports = new Set<string>();
+
   const moduleExports = Object.keys(exports).map((key) =>
     key === 'default'
-      ? `export default ${stringifyExports(exports[key])};`
-      : `export var ${key} = ${stringifyExports(exports[key])};`,
+      ? `export default ${stringifyExports(recipeImports, exports[key])};`
+      : `export var ${key} = ${stringifyExports(recipeImports, exports[key])};`,
   );
 
-  const outputCode = [...cssImports, ...moduleExports];
+  const outputCode = [...cssImports, ...recipeImports, ...moduleExports];
 
   return outputCode.join('\n');
 };