feat: experimental.renderBuiltUrl (revised build base options)

docs/guide/build.md

@@ -197,45 +197,34 @@ A user may choose to deploy in three different paths:
 - The generated hashed assets (JS, CSS, and other file types like images)
 - The copied [public files](assets.md#the-public-directory)
 
-A single static [base](#public-base-path) isn't enough in these scenarios. Vite provides experimental support for advanced base options during build, using `experimental.buildAdvancedBaseOptions`.
+A single static [base](#public-base-path) isn't enough in these scenarios. Vite provides experimental support for advanced base options during build, using `experimental.renderBuiltUrl`.
 
 ```js
-  experimental: {
-    buildAdvancedBaseOptions: {
-      // Same as base: './'
-      // type: boolean, default: false
-      relative: true
-      // Static base
-      // type: string, default: undefined
-      url: 'https://cdn.domain.com/'
-      // Dynamic base to be used for paths inside JS
-      // type: (url: string) => string, default: undefined
-      runtime: (url: string) => `window.__toCdnUrl(${url})`
-    },
+experimental: {
+  renderBuiltUrl: (filename: string, { hostType: 'js' | 'css' | 'html' }) => {
+    if (hostType === 'js') {
+      return { runtime: `window.__toCdnUrl(${JSON.stringify(filename)})` }
+    } else {
+      return { relative: true }
+    }
   }
+}
 ```
 
-When `runtime` is defined, it will be used for hashed assets and public files paths inside JS assets. Inside CSS and HTML generated files, paths will use `url` if defined or fallback to `config.base`.
-
-If `relative` is true and `url` is defined, relative paths will be prefered for assets inside the same group (for example a hashed image referenced from a JS file). And `url` will be used for the paths in HTML entries and for paths between different groups (a public file referenced from a CSS file).
-
-If the hashed assets and public files aren't deployed together, options for each group can be defined independently:
+If the hashed assets and public files aren't deployed together, options for each group can be defined independently using asset `type` included in the third `context` param given to the function.
 
 ```js
   experimental: {
-    buildAdvancedBaseOptions: {
-      assets: {
-        relative: true
-        url: 'https://cdn.domain.com/assets',
-        runtime: (url: string) => `window.__assetsPath(${url})`
-      },
-      public: {
-        relative: false
-        url: 'https://www.domain.com/',
-        runtime: (url: string) => `window.__publicPath + ${url}`
+    renderBuiltUrl(filename: string, { hostType: 'js' | 'css' | 'html', type: 'public' | 'asset' }) {
+      if (type === 'public') {
+        return 'https://www.domain.com/' + filename
+      }
+      else if (path.extname(importer) === '.js') {
+        return { runtime: `window.__assetsPath(${JSON.stringify(filename)})` }
+      }
+      else {
+        return 'https://cdn.domain.com/assets/' + filename
       }
     }
   }
 ```
-
-Any option that isn't defined in the `public` or `assets` entry will be inherited from the main `buildAdvancedBaseOptions` config.

packages/plugin-legacy/src/index.ts

@@ -6,7 +6,6 @@ import { fileURLToPath } from 'node:url'
 import { build, normalizePath } from 'vite'
 import MagicString from 'magic-string'
 import type {
-  BuildAdvancedBaseOptions,
   BuildOptions,
   HtmlTagDescriptor,
   Plugin,
@@ -32,38 +31,71 @@ async function loadBabel() {
   return babel
 }
 
-function getBaseInHTML(
-  urlRelativePath: string,
-  baseOptions: BuildAdvancedBaseOptions,
-  config: ResolvedConfig
-) {
+// Duplicated from build.ts in Vite Core, at least while the feature is experimental
+// We should later expose this helper for other plugins to use
+function toOutputFilePathInHtml(
+  filename: string,
+  type: 'asset' | 'public',
+  hostId: string,
+  hostType: 'js' | 'css' | 'html',
+  config: ResolvedConfig,
+  toRelative: (filename: string, importer: string) => string
+): string {
+  const { renderBuiltUrl } = config.experimental
+  let relative = config.base === '' || config.base === './'
+  if (renderBuiltUrl) {
+    const result = renderBuiltUrl(filename, {
+      hostId,
+      hostType,
+      type,
+      ssr: !!config.build.ssr
+    })
+    if (typeof result === 'object') {
+      if (result.runtime) {
+        throw new Error(
+          `{ runtime: "${result.runtime}" } is not supported for assets in ${hostType} files: ${filename}`
+        )
+      }
+      if (typeof result.relative === 'boolean') {
+        relative = true
+      }
+    } else if (result) {
+      return result
+    }
+  }
+  if (relative && !config.build.ssr) {
+    return toRelative(filename, hostId)
+  } else {
+    return config.base + filename
+  }
+}
+function getBaseInHTML(urlRelativePath: string, config: ResolvedConfig) {
   // Prefer explicit URL if defined for linking to assets and public files from HTML,
   // even when base relative is specified
-  return (
-    baseOptions.url ??
-    (baseOptions.relative
-      ? path.posix.join(
-          path.posix.relative(urlRelativePath, '').slice(0, -2),
-          './'
-        )
-      : config.base)
-  )
+  return config.base === './' || config.base === ''
+    ? path.posix.join(
+        path.posix.relative(urlRelativePath, '').slice(0, -2),
+        './'
+      )
+    : config.base
 }
 
-function getAssetsBase(urlRelativePath: string, config: ResolvedConfig) {
-  return getBaseInHTML(
-    urlRelativePath,
-    config.experimental.buildAdvancedBaseOptions.assets,
-    config
-  )
-}
 function toAssetPathFromHtml(
   filename: string,
   htmlPath: string,
   config: ResolvedConfig
 ): string {
   const relativeUrlPath = normalizePath(path.relative(config.root, htmlPath))
-  return getAssetsBase(relativeUrlPath, config) + filename
+  const toRelative = (filename: string, hostId: string) =>
+    getBaseInHTML(relativeUrlPath, config) + filename
+  return toOutputFilePathInHtml(
+    filename,
+    'asset',
+    htmlPath,
+    'html',
+    config,
+    toRelative
+  )
 }
 
 // https://gist.github.com/samthor/64b114e4a4f539915a95b91ffd340acc

packages/vite/src/node/build.ts

@@ -22,7 +22,7 @@ import type { RollupCommonJSOptions } from 'types/commonjs'
 import type { RollupDynamicImportVarsOptions } from 'types/dynamicImportVars'
 import type { TransformOptions } from 'esbuild'
 import type { InlineConfig, ResolvedConfig } from './config'
-import { isDepsOptimizerEnabled, resolveBaseUrl, resolveConfig } from './config'
+import { isDepsOptimizerEnabled, resolveConfig } from './config'
 import { buildReporterPlugin } from './plugins/reporter'
 import { buildEsbuildPlugin } from './plugins/esbuild'
 import { terserPlugin } from './plugins/terser'
@@ -831,109 +831,89 @@ function injectSsrFlag<T extends Record<string, any>>(
   return { ...(options ?? {}), ssr: true } as T & { ssr: boolean }
 }
 
-/*
- * If defined, these functions will be called for assets and public files
- * paths which are generated in JS assets. Examples:
- *
- *   assets: { runtime: (url: string) => `window.__assetsPath(${url})` }
- *   public: { runtime: (url: string) => `window.__publicPath + ${url}` }
- *
- * For assets and public files paths in CSS or HTML, the corresponding
- * `assets.url` and `public.url` base urls or global base will be used.
- *
- * When using relative base, the assets.runtime function isn't needed as
- * all the asset paths will be computed using import.meta.url
- * The public.runtime function is still useful if the public files aren't
- * deployed in the same base as the hashed assets
- */
-
-export interface BuildAdvancedBaseOptions {
-  /**
-   * Relative base. If true, every generated URL is relative and the dist folder
-   * can be deployed to any base or subdomain. Use this option when the base
-   * is unkown at build time
-   * @default false
-   */
-  relative?: boolean
-  url?: string
-  runtime?: (filename: string) => string
-}
-
-export type BuildAdvancedBaseConfig = BuildAdvancedBaseOptions & {
-  /**
-   * Base for assets and public files in case they should be different
-   */
-  assets?: string | BuildAdvancedBaseOptions
-  public?: string | BuildAdvancedBaseOptions
-}
-
-export type ResolvedBuildAdvancedBaseConfig = BuildAdvancedBaseOptions & {
-  assets: BuildAdvancedBaseOptions
-  public: BuildAdvancedBaseOptions
-}
-
-/**
- * Resolve base. Note that some users use Vite to build for non-web targets like
- * electron or expects to deploy
- */
-export function resolveBuildAdvancedBaseConfig(
-  baseConfig: BuildAdvancedBaseConfig | undefined,
-  resolvedBase: string,
-  isBuild: boolean,
-  logger: Logger
-): ResolvedBuildAdvancedBaseConfig {
-  baseConfig ??= {}
-
-  const relativeBaseShortcut = resolvedBase === '' || resolvedBase === './'
-
-  const resolved = {
-    relative: baseConfig?.relative ?? relativeBaseShortcut,
-    url: baseConfig?.url
-      ? resolveBaseUrl(
-          baseConfig?.url,
-          isBuild,
-          logger,
-          'experimental.buildAdvancedBaseOptions.url'
-        )
-      : undefined,
-    runtime: baseConfig?.runtime
+export type RenderBuiltAssetUrl = (
+  filename: string,
+  type: {
+    type: 'asset' | 'public'
+    hostId: string
+    hostType: 'js' | 'css' | 'html'
+    ssr: boolean
+  }
+) => string | { relative?: boolean; runtime?: string } | undefined
+
+export function toOutputFilePathInString(
+  filename: string,
+  type: 'asset' | 'public',
+  hostId: string,
+  hostType: 'js' | 'css' | 'html',
+  config: ResolvedConfig,
+  toRelative: (
+    filename: string,
+    hostType: string
+  ) => string | { runtime: string }
+): string | { runtime: string } {
+  const { renderBuiltUrl } = config.experimental
+  let relative = config.base === '' || config.base === './'
+  if (renderBuiltUrl) {
+    const result = renderBuiltUrl(filename, {
+      hostId,
+      hostType,
+      type,
+      ssr: !!config.build.ssr
+    })
+    if (typeof result === 'object') {
+      if (result.runtime) {
+        return { runtime: result.runtime }
+      }
+      if (typeof result.relative === 'boolean') {
+        relative = result.relative
+      }
+    } else if (result) {
+      return result
+    }
   }
-
-  return {
-    ...resolved,
-    assets: resolveBuildBaseSpecificOptions(
-      baseConfig?.assets,
-      resolved,
-      isBuild,
-      logger,
-      'assets'
-    ),
-    public: resolveBuildBaseSpecificOptions(
-      baseConfig?.public,
-      resolved,
-      isBuild,
-      logger,
-      'public'
-    )
+  if (relative && !config.build.ssr) {
+    return toRelative(filename, hostId)
   }
+  return config.base + filename
 }
 
-function resolveBuildBaseSpecificOptions(
-  options: BuildAdvancedBaseOptions | string | undefined,
-  parent: BuildAdvancedBaseOptions,
-  isBuild: boolean,
-  logger: Logger,
-  optionName: string
-): BuildAdvancedBaseOptions {
-  const urlConfigPath = `experimental.buildAdvancedBaseOptions.${optionName}.url`
-  if (typeof options === 'string') {
-    options = { url: options }
+export function toOutputFilePathWithoutRuntime(
+  filename: string,
+  type: 'asset' | 'public',
+  hostId: string,
+  hostType: 'js' | 'css' | 'html',
+  config: ResolvedConfig,
+  toRelative: (filename: string, hostId: string) => string
+): string {
+  const { renderBuiltUrl } = config.experimental
+  let relative = config.base === '' || config.base === './'
+  if (renderBuiltUrl) {
+    const result = renderBuiltUrl(filename, {
+      hostId,
+      hostType,
+      type,
+      ssr: !!config.build.ssr
+    })
+    if (typeof result === 'object') {
+      if (result.runtime) {
+        throw new Error(
+          `{ runtime: "${result.runtime} }" is not supported for assets in ${hostType} files: ${filename}`
+        )
+      }
+      if (typeof result.relative === 'boolean') {
+        relative = result.relative
+      }
+    } else if (result) {
+      return result
+    }
   }
-  return {
-    relative: options?.relative ?? parent.relative,
-    url: options?.url
-      ? resolveBaseUrl(options?.url, isBuild, logger, urlConfigPath)
-      : parent.url,
-    runtime: options?.runtime ?? parent.runtime
+  if (relative && !config.build.ssr) {
+    return toRelative(filename, hostId)
+  } else {
+    return config.base + filename
   }
 }
+
+export const toOutputFilePathInCss = toOutputFilePathWithoutRuntime
+export const toOutputFilePathInHtml = toOutputFilePathWithoutRuntime