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Merge pull request #2102 from embroider-build/user-controlled-babel
User-controlled babel config
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| Original file line number | Diff line number | Diff line change |
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| module.exports = require('./src/babel'); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| import type { PluginItem } from '@babel/core'; | ||
| import { existsSync } from 'fs'; | ||
| import { | ||
| locateEmbroiderWorkingDir, | ||
| ResolverLoader, | ||
| templateColocationPluginPath, | ||
| type TemplateColocationPluginOptions, | ||
| } from '@embroider/core'; | ||
| import { join } from 'path'; | ||
| import type { Transform } from 'babel-plugin-ember-template-compilation'; | ||
| import type { Options as ResolverTransformOptions } from './resolver-transform'; | ||
| import type { Options as AdjustImportsOptions } from './babel-plugin-adjust-imports'; | ||
|
|
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| export interface CompatBabelState { | ||
| plugins: PluginItem[]; | ||
| templateTransforms: Transform[]; | ||
| babelMacros: PluginItem[]; | ||
| templateMacros: Transform[]; | ||
| } | ||
|
|
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| function loadCompatConfig(): CompatBabelState { | ||
| let compatFile = join(locateEmbroiderWorkingDir(process.cwd()), '_babel_compat_.js'); | ||
| if (existsSync(compatFile)) { | ||
| // eslint-disable-next-line @typescript-eslint/no-require-imports | ||
| return require(compatFile); | ||
| } | ||
| return { | ||
| plugins: [], | ||
| templateTransforms: [], | ||
| babelMacros: [], | ||
| templateMacros: [], | ||
| }; | ||
| } | ||
|
|
||
| const resolverLoader = new ResolverLoader(process.cwd()); | ||
|
|
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| export function pluginsFromV1Addons() { | ||
| let config = loadCompatConfig(); | ||
| return config.plugins; | ||
| } | ||
|
|
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| export function transformsFromV1Addons() { | ||
| let config = loadCompatConfig(); | ||
| return config.templateTransforms; | ||
| } | ||
|
|
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| export function looseModeSupport(): Transform { | ||
| const { resolver } = resolverLoader; | ||
| let opts: ResolverTransformOptions = { | ||
| appRoot: resolver.options.appRoot, | ||
| emberVersion: resolver.options.emberVersion, | ||
| }; | ||
| return [require.resolve('./resolver-transform'), opts]; | ||
| } | ||
|
|
||
| export function templateMacros() { | ||
| let config = loadCompatConfig(); | ||
| return config.templateMacros; | ||
| } | ||
|
|
||
| export function babelMacros() { | ||
| let config = loadCompatConfig(); | ||
| return config.babelMacros; | ||
| } | ||
|
|
||
| export function adjustImports() { | ||
| let pluginConfig: AdjustImportsOptions = { | ||
| appRoot: resolverLoader.resolver.options.appRoot, | ||
| }; | ||
| return [require.resolve('./babel-plugin-adjust-imports'), pluginConfig]; | ||
| } | ||
|
|
||
| export function oldDebugMacros(): PluginItem[] { | ||
| let debugMacros = require.resolve('babel-plugin-debug-macros'); | ||
| return [ | ||
| [ | ||
| debugMacros, | ||
| { | ||
| flags: [ | ||
| { | ||
| source: '@glimmer/env', | ||
| flags: { | ||
| DEBUG: true, | ||
| CI: false, | ||
| }, | ||
| }, | ||
| ], | ||
| debugTools: { | ||
| isDebug: true, | ||
| source: '@ember/debug', | ||
| assertPredicateIndex: 1, | ||
| }, | ||
| externalizeHelpers: { | ||
| module: '@ember/debug', | ||
| }, | ||
| }, | ||
| '@ember/debug stripping', | ||
| ], | ||
| [ | ||
| debugMacros, | ||
| { | ||
| externalizeHelpers: { | ||
| module: '@ember/application/deprecations', | ||
| }, | ||
| debugTools: { | ||
| isDebug: true, | ||
| source: '@ember/application/deprecations', | ||
| assertPredicateIndex: 1, | ||
| }, | ||
| }, | ||
| '@ember/application/deprecations stripping', | ||
| ], | ||
| ]; | ||
| } | ||
|
|
||
| export function templateColocation(): PluginItem { | ||
| let colocationOptions: TemplateColocationPluginOptions = { | ||
| appRoot: resolverLoader.resolver.options.appRoot, | ||
|
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| // This extra weirdness is a compromise in favor of build performance. | ||
| // | ||
| // 1. When auto-upgrading an addon from v1 to v2, we definitely want to | ||
| // run any custom AST transforms in stage1. | ||
| // | ||
| // 2. In general case, AST transforms are allowed to manipulate Javascript | ||
| // scope. This means that running transforms -- even when we're doing | ||
| // source-to-source compilation that emits handlebars and not wire | ||
| // format -- implies changing .hbs files into .js files. | ||
| // | ||
| // 3. So stage1 may need to rewrite .hbs to .hbs.js (to avoid colliding | ||
| // with an existing co-located .js file). | ||
| // | ||
| // 4. But stage1 doesn't necessarily want to run babel over the | ||
| // corresponding JS file. Most of the time, that's just an | ||
| // unnecessarily expensive second parse. (We only run it in stage1 to | ||
| // eliminate an addon's custom babel plugins, and many addons don't | ||
| // have any.) | ||
| // | ||
| // 5. Therefore, the work of template-colocation gets defered until here, | ||
| // and it may see co-located templates named `.hbs.js` instead of the | ||
| // usual `.hbs. | ||
| templateExtensions: ['.hbs', '.hbs.js'], | ||
|
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| // All of the above only applies to auto-upgraded packages that were | ||
| // authored in v1. V2 packages don't get any of this complexity, they're | ||
| // supposed to take care of colocating their own templates explicitly. | ||
| packageGuard: true, | ||
| }; | ||
| return [templateColocationPluginPath, colocationOptions]; | ||
| } | ||
|
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| export function babelCompatSupport(): PluginItem[] { | ||
| return [...babelMacros(), adjustImports(), ...oldDebugMacros(), templateColocation(), ...pluginsFromV1Addons()]; | ||
| } | ||
|
|
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| export function templateCompatSupport(): Transform[] { | ||
| return [...transformsFromV1Addons(), ...templateMacros(), looseModeSupport()]; | ||
| } |
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