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build when SASS deprecation warning occurs **/ failOnDeprecations?: boolean; + /** If set, wraps all component CSS output in a @layer with this name **/ + layerName?: string; } /** * Builds themed components and optionally design tokens, if not skipped. @@ -71,6 +73,7 @@ export async function buildThemedComponentsInternal(params: BuildThemedComponent descriptions = {}, jsonSchema = false, failOnDeprecations, + layerName, } = params; if (!skip.includes('design-tokens') && !designTokensOutputDir) { @@ -87,7 +90,7 @@ export async function buildThemedComponentsInternal(params: BuildThemedComponent scssDir, componentsOutputDir, getInlineStylesheets(primary, secondary, defaults, variablesMap, propertiesMap, neededTokens), - { failOnDeprecations }, + { failOnDeprecations, layerName }, ); const internalTokensTask = createInternalTokenFiles(defaults, propertiesMap, componentsOutputDir); diff --git a/src/build/tasks/postcss/index.ts b/src/build/tasks/postcss/index.ts index eba588a..b1ef133 100644 --- a/src/build/tasks/postcss/index.ts +++ b/src/build/tasks/postcss/index.ts @@ -8,6 +8,7 @@ import postCSSInlineSVG from 'postcss-inline-svg'; import postCSSModules from 'postcss-modules'; import postCSSIncreaseSpecificity from './increase-specifity'; +import postCSSLayerWrap from './layer-wrap'; import { createRelativeScopedNameFunction } from './generate-scoped-name'; import { writeCssModule } from './write-css-modules'; @@ -21,14 +22,20 @@ const browserslist = [ 'last 3 Safari versions', ]; -export const postCSSAfterAll = (input: string, filename: string) => { - return postcss([ +export interface PostCSSAfterAllOptions { + layerName?: string; +} + +export const postCSSAfterAll = (input: string, filename: string, options: PostCSSAfterAllOptions = {}) => { + const plugins = [ autoprefixer({ overrideBrowserslist: browserslist, }), postCSSIncreaseSpecificity(), postCSSDiscardEmpty(), - ]).process(input, { from: filename }); + ...(options.layerName ? [postCSSLayerWrap({ layerName: options.layerName })] : []), + ]; + return postcss(plugins).process(input, { from: filename }); }; export const postCSSForEach = (sourceDir: string, outputDir: string, input: string, filename: string) => { diff --git a/src/build/tasks/postcss/layer-wrap.ts b/src/build/tasks/postcss/layer-wrap.ts new file mode 100644 index 0000000..fde5971 --- /dev/null +++ b/src/build/tasks/postcss/layer-wrap.ts @@ -0,0 +1,34 @@ +// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. +// SPDX-License-Identifier: Apache-2.0 +import { PluginCreator, AtRule as AtRuleType } from 'postcss'; + +export interface LayerWrapOptions { + layerName: string; +} + +const creator: PluginCreator = ( + { layerName = 'awsui-components' } = { layerName: 'awsui-components' }, +) => { + return { + postcssPlugin: 'postcss-layer-wrap', + OnceExit(root, { AtRule }) { + // Skip if already wrapped in a single @layer + if ( + root.nodes.length === 1 && + root.nodes[0].type === 'atrule' && + (root.nodes[0] as AtRuleType).name === 'layer' + ) { + return; + } + + const layer = new AtRule({ name: 'layer', params: layerName }); + layer.append(root.nodes); + root.removeAll(); + root.append(layer); + }, + }; +}; + +creator.postcss = true; + +export default creator; diff --git a/src/build/tasks/style.ts b/src/build/tasks/style.ts index abc589c..83a4b68 100644 --- a/src/build/tasks/style.ts +++ b/src/build/tasks/style.ts @@ -14,6 +14,7 @@ export interface InlineStylesheet { export interface BuildStylesOptions { failOnDeprecations?: boolean; + layerName?: string; } export async function buildStyles( @@ -91,7 +92,9 @@ function createCompiler(inlines: InlineStylesheet[], outputDir: string, sassDir: } const intermediate = path.join(sassDir, rename(file, '.css')); const postCSSForEachResult = await postCSSForEach(sassDir, outputDir, sassResult.css, intermediate); - const postCSSAfterAllResult = await postCSSAfterAll(postCSSForEachResult.css, intermediate); + const postCSSAfterAllResult = await postCSSAfterAll(postCSSForEachResult.css, intermediate, { + layerName: options.layerName, + }); const output = path.join(outputDir, rename(file, scopedFileExt)); await fs.promises.writeFile(output, postCSSAfterAllResult.css);