Support identifier formatting configuration

.changeset/config.json

@@ -9,5 +9,8 @@
   "access": "public",
   "baseBranch": "master",
   "updateInternalDependencies": "patch",
+  "___experimentalUnsafeOptions_WILL_CHANGE_IN_PATCH": {
+    "onlyUpdatePeerDependentsWhenOutOfRange": true
+  },
   "ignore": ["@fixtures/*", "test-helpers", "vanilla-extract-webpack-react"]
 }

.changeset/gold-wombats-thank.md

@@ -0,0 +1,21 @@
+---
+'@vanilla-extract/snowpack-plugin': major
+---
+
+Formatting of identifiers (e.g. class names, keyframes, CSS Vars, etc) can now be configured via the `identifiers` option which accepts either `short` or `debug`.
+
+- `short` identifiers are a 7+ character hash. e.g. `hnw5tz3`
+- `debug` identifiers contain human readable prefixes representing the owning filename and a potential rule level debug name. e.g. `somefile_mystyle_hnw5tz3`
+
+```js
+import { vanillaExtractPlugin } from '@vanilla-extract/snowpack-plugin';
+
+const snowpackConfig = { 
+    plugins: [['@vanilla-extract/snowpack-plugin', { identifiers: 'short' }]] 
+}
+```
+
+BREAKING CHANGE
+
+Previously identifiers were formatted as `short` when `process.env.NODE_ENV` was set to "production". By default, they will now be formatted according to Snowpacks's [mode config](https://www.snowpack.dev/reference/configuration#mode).
+

.changeset/hip-icons-destroy.md

@@ -0,0 +1,19 @@
+---
+'@vanilla-extract/webpack-plugin': major
+---
+
+Formatting of identifiers (e.g. class names, keyframes, CSS Vars, etc) can now be configured via the `identifiers` option which accepts either `short` or `debug`.
+
+- `short` identifiers are a 7+ character hash. e.g. `hnw5tz3`
+- `debug` identifiers contain human readable prefixes representing the owning filename and a potential rule level debug name. e.g. `somefile_mystyle_hnw5tz3`
+
+```js
+import { vanillaExtractPlugin } from '@vanilla-extract/webpack-plugin';
+
+vanillaExtractPlugin({ identifiers: 'short' })
+```
+
+BREAKING CHANGE
+
+Previously identifiers were formatted as `short` when `process.env.NODE_ENV` was set to "production". By default, they will now be formatted according to webpack's [mode config](https://webpack.js.org/configuration/mode/).
+

.changeset/olive-zoos-roll.md

@@ -0,0 +1,18 @@
+---
+'@vanilla-extract/vite-plugin': major
+---
+
+Formatting of identifiers (e.g. class names, keyframes, CSS Vars, etc) can now be configured via the `identifiers` option which accepts either `short` or `debug`.
+
+- `short` identifiers are a 7+ character hash. e.g. `hnw5tz3`
+- `debug` identifiers contain human readable prefixes representing the owning filename and a potential rule level debug name. e.g. `somefile_mystyle_hnw5tz3`
+
+```js
+import { vanillaExtractPlugin } from '@vanilla-extract/vite-plugin';
+
+vanillaExtractPlugin({ identifiers: 'short' });
+```
+
+BREAKING CHANGE
+
+Previously identifiers were formatted as `short` when `process.env.NODE_ENV` was set to "production". By default, they will now be formatted according to Vite's [mode config](https://vitejs.dev/config/#mode).

.changeset/sharp-dingos-smell.md

@@ -0,0 +1,18 @@
+---
+'@vanilla-extract/esbuild-plugin': major
+---
+
+Formatting of identifiers (e.g. class names, keyframes, CSS Vars, etc) can now be configured via the `identifiers` option which accepts either `short` or `debug`.
+
+- `short` identifiers are a 7+ character hash. e.g. `hnw5tz3`
+- `debug` identifiers contain human readable prefixes representing the owning filename and a potential rule level debug name. e.g. `somefile_mystyle_hnw5tz3`
+
+```js
+import { vanillaExtractPlugin } from '@vanilla-extract/esbuild-plugin';
+
+vanillaExtractPlugin({ identifiers: 'short' });
+```
+
+BREAKING CHANGE
+
+Previously identifiers were formatted as `short` when `process.env.NODE_ENV` was set to "production". By default, they will now be formatted according to esbuild's [minify config](https://esbuild.github.io/api/#minify).

.changeset/twenty-cougars-visit.md

@@ -0,0 +1,6 @@
+---
+'@vanilla-extract/css': minor
+'@vanilla-extract/integration': minor
+---
+
+Support configurable identifier types 

README.md

@@ -85,6 +85,8 @@ Want to work at a higher level while maximising style re-use? Check out  🍨 [S
   - [Snowpack](#snowpack)
   - [Gatsby](#gatsby)
   - [Test environments](#test-environments)
+  - [Configuration](#configuration)
+    - [identifiers](#identifiers)
 - [Styling API](#styling-api)
   - [style](#style)
   - [styleVariants](#stylevariants)
@@ -132,6 +134,8 @@ npm install @vanilla-extract/css @vanilla-extract/babel-plugin @vanilla-extract/
 
 3. Add the [webpack](https://webpack.js.org) plugin.
 
+> 💡 This plugin accepts an optional [configuration object](#configuration).
+
 ```js
 const { VanillaExtractPlugin } = require('@vanilla-extract/webpack-plugin');
 
@@ -185,6 +189,8 @@ npm install @vanilla-extract/css @vanilla-extract/esbuild-plugin
 
 2. Add the [esbuild](https://esbuild.github.io/) plugin to your build script.
 
+> 💡 This plugin accepts an optional [configuration object](#configuration).
+
 ```js
 const { vanillaExtractPlugin } = require('@vanilla-extract/esbuild-plugin');
 
@@ -246,6 +252,8 @@ npm install @vanilla-extract/css @vanilla-extract/vite-plugin
 
 2. Add the [Vite](https://vitejs.dev/) plugin to your Vite config.
 
+> 💡 This plugin accepts an optional [configuration object](#configuration).
+
 ```js
 import { vanillaExtractPlugin } from '@vanilla-extract/vite-plugin';
 
@@ -267,6 +275,8 @@ npm install @vanilla-extract/css @vanilla-extract/snowpack-plugin
 
 2. Add the [Snowpack](https://www.snowpack.dev/) plugin to your snowpack config.
 
+> 💡 This plugin accepts an optional [configuration object](#configuration).
+
 ```js
 // snowpack.config.json
 {
@@ -305,6 +315,16 @@ In testing environments (like `jsdom`) vanilla-extract will create and insert st
 import '@vanilla-extract/css/disableRuntimeStyles';
 ```
 
+### Configuration
+
+#### identifiers
+
+Different formatting of identifiers (e.g. class names, keyframes, CSS Vars, etc) can be configured by selecting from the following options:
+
+- `short` identifiers are a 7+ character hash. e.g. `hnw5tz3`
+- `debug` identifiers contain human readable prefixes representing the owning filename and a potential rule level debug name. e.g. `myfile_mystyle_hnw5tz3`
+
+Each integration will set a default value based on the configuration options passed to the bundler.
 
 ---
 

package.json

@@ -41,8 +41,8 @@
     "@babel/preset-env": "^7.13.15",
     "@babel/preset-react": "^7.13.13",
     "@babel/preset-typescript": "^7.13.0",
-    "@changesets/changelog-github": "^0.3.0",
-    "@changesets/cli": "^2.14.1",
+    "@changesets/changelog-github": "^0.4.0",
+    "@changesets/cli": "^2.16.0",
     "@manypkg/cli": "^0.17.0",
     "@preconstruct/cli": "^2.0.1",
     "@testing-library/dom": "^7.30.0",

packages/css/src/adapter.ts

@@ -6,6 +6,7 @@ export const mockAdapter: Adapter = {
   onEndFileScope: () => {},
   registerComposition: () => {},
   markCompositionUsed: () => {},
+  getIdentOption: () => 'debug',
 };
 
 let adapter: Adapter = mockAdapter;
@@ -46,3 +47,12 @@ export const markCompositionUsed: Adapter['markCompositionUsed'] = (
 export const onEndFileScope: Adapter['onEndFileScope'] = (...props) => {
   return adapter.onEndFileScope(...props);
 };
+
+export const getIdentOption: Adapter['getIdentOption'] = (...props) => {
+  // Backwards compatibility with old versions of the integration package
+  if (!('getIdentOption' in adapter)) {
+    return process.env.NODE_ENV === 'production' ? 'short' : 'debug';
+  }
+
+  return adapter.getIdentOption(...props);
+};

packages/css/src/identifier.ts

@@ -1,5 +1,6 @@
 import hash from '@emotion/hash';
 
+import { getIdentOption } from './adapter';
 import { getAndIncrementRefCounter, getFileScope } from './fileScope';
 
 function getDevPrefix(debugId: string | undefined) {
@@ -29,7 +30,7 @@ export function generateIdentifier(debugId: string | undefined) {
 
   let identifier = `${fileScopeHash}${refCount}`;
 
-  if (process.env.NODE_ENV !== 'production') {
+  if (getIdentOption() === 'debug') {
     const devPrefix = getDevPrefix(debugId);
 
     if (devPrefix) {

packages/css/src/runtimeAdapter.ts

@@ -67,6 +67,8 @@ const browserRuntimeAdapter: Adapter = {
 
     bufferedCSSObjs = [];
   },
+  getIdentOption: () =>
+    process.env.NODE_ENV === 'production' ? 'short' : 'debug',
 };
 
 if (typeof window !== 'undefined') {

packages/css/src/types.ts

@@ -102,12 +102,15 @@ export interface Composition {
   identifier: string;
   classList: string;
 }
+
+type IdentOption = 'short' | 'debug';
 export interface Adapter {
   appendCss: (css: CSS, fileScope: FileScope) => void;
   registerClassName: (className: string) => void;
   registerComposition: (composition: Composition) => void;
   markCompositionUsed: (identifier: string) => void;
   onEndFileScope: (fileScope: FileScope) => void;
+  getIdentOption: () => IdentOption;
 }
 
 export type NullableTokens = {

packages/css/src/vars.ts

@@ -11,6 +11,7 @@ import cssesc from 'cssesc';
 import { Tokens, NullableTokens, ThemeVars } from './types';
 import { getAndIncrementRefCounter, getFileScope } from './fileScope';
 import { validateContract } from './validateContract';
+import { getIdentOption } from './adapter';
 
 export function createVar(debugId?: string): CSSVarFunction {
   // Convert ref count to base 36 for optimal hash lengths
@@ -20,7 +21,7 @@ export function createVar(debugId?: string): CSSVarFunction {
     packageName ? `${packageName}${filePath}` : filePath,
   );
   const varName =
-    process.env.NODE_ENV !== 'production' && debugId
+    getIdentOption() === 'debug' && debugId
       ? `${debugId}__${fileScopeHash}${refCount}`
       : `${fileScopeHash}${refCount}`;
 

packages/esbuild-plugin/src/index.ts

@@ -5,6 +5,7 @@ import {
   getSourceFromVirtualCssFile,
   compile,
   vanillaExtractFilescopePlugin,
+  IdentifierOption,
 } from '@vanilla-extract/integration';
 import type { Plugin } from 'esbuild';
 
@@ -15,12 +16,14 @@ interface VanillaExtractPluginOptions {
   externals?: Array<string>;
   runtime?: boolean;
   processCss?: (css: string) => Promise<string>;
+  identifiers?: IdentifierOption;
 }
 export function vanillaExtractPlugin({
   outputCss,
   externals = [],
   runtime = false,
   processCss,
+  identifiers,
 }: VanillaExtractPluginOptions = {}): Plugin {
   if (runtime) {
     // If using runtime CSS then just apply fileScopes to code
@@ -64,6 +67,8 @@ export function vanillaExtractPlugin({
           source,
           filePath: path,
           outputCss,
+          identOption:
+            identifiers ?? (build.initialOptions.minify ? 'short' : 'debug'),
         });
 
         return {

packages/integration/src/index.ts

@@ -4,3 +4,5 @@ export { getPackageInfo } from './packageInfo';
 export { compile, vanillaExtractFilescopePlugin } from './compile';
 export { hash } from './hash';
 export * from './filters';
+
+export type { IdentifierOption } from './processVanillaFile';

packages/integration/src/processVanillaFile.ts

@@ -23,10 +23,13 @@ function parseFileScope(serialisedFileScope: string): FileScope {
   };
 }
 
+export type IdentifierOption = ReturnType<Adapter['getIdentOption']>;
+
 interface ProcessVanillaFileOptions {
   source: string;
   filePath: string;
   outputCss?: boolean;
+  identOption?: IdentifierOption;
   serializeVirtualCssPath?: (file: {
     fileName: string;
     base64Source: string;
@@ -37,6 +40,7 @@ export function processVanillaFile({
   source,
   filePath,
   outputCss = true,
+  identOption = process.env.NODE_ENV === 'production' ? 'short' : 'debug',
   serializeVirtualCssPath,
 }: ProcessVanillaFileOptions) {
   type Css = Parameters<Adapter['appendCss']>[0];
@@ -68,6 +72,7 @@ export function processVanillaFile({
       usedCompositions.add(identifier);
     },
     onEndFileScope: () => {},
+    getIdentOption: () => identOption,
   };
 
   setAdapter(cssAdapter);

packages/snowpack-plugin/src/index.ts

@@ -4,10 +4,15 @@ import {
   processVanillaFile,
   compile,
   getSourceFromVirtualCssFile,
+  IdentifierOption,
 } from '@vanilla-extract/integration';
 
+interface Options {
+  identifiers?: IdentifierOption;
+}
 export default function vanillaExtractPlugin(
   snowpackConfig: SnowpackConfig,
+  { identifiers }: Options = {},
 ): SnowpackPlugin {
   const importedByMap = new Map();
 
@@ -53,6 +58,9 @@ export default function vanillaExtractPlugin(
         source,
         filePath,
         outputCss: !isSSR,
+        identOption:
+          identifiers ??
+          (snowpackConfig.mode === 'production' ? 'short' : 'debug'),
         serializeVirtualCssPath({ base64Source, fileScope }) {
           const cssUrl = `${path.join(cwd, fileScope.filePath)}.css`;
 

packages/vite-plugin/src/index.ts

@@ -9,9 +9,13 @@ import {
   compile,
   hash,
   getPackageInfo,
+  IdentifierOption,
 } from '@vanilla-extract/integration';
 
-export function vanillaExtractPlugin(): Plugin {
+interface Options {
+  identifiers?: IdentifierOption;
+}
+export function vanillaExtractPlugin({ identifiers }: Options = {}): Plugin {
   let config: ResolvedConfig;
   let packageInfo: ReturnType<typeof getPackageInfo>;
   const cssMap = new Map<string, string>();
@@ -83,6 +87,8 @@ export function vanillaExtractPlugin(): Plugin {
         source,
         filePath: id,
         outputCss: !ssr,
+        identOption:
+          identifiers ?? (config.mode === 'production' ? 'short' : 'debug'),
       });
     },
   };