snippetadapter.js 4.3 KB

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  1. /**
  2. * @license Copyright (c) 2003-2018, CKSource - Frederico Knabben. All rights reserved.
  3. * For licensing, see LICENSE.md.
  4. */
  5. /* eslint-env node */
  6. const path = require( 'path' );
  7. const fs = require( 'fs' );
  8. const webpack = require( 'webpack' );
  9. const { bundler, styles: { getPostCssConfig } } = require( '@ckeditor/ckeditor5-dev-utils' );
  10. const CKEditorWebpackPlugin = require( '@ckeditor/ckeditor5-dev-webpack-plugin' );
  11. const ExtractTextPlugin = require( 'extract-text-webpack-plugin' );
  12. const BabelMinifyPlugin = require( 'babel-minify-webpack-plugin' );
  13. const webpackProcesses = new Map();
  14. module.exports = function snippetAdapter( data ) {
  15. if ( !data.snippetSource.js ) {
  16. throw new Error( `Missing snippet source for "${ data.snippetPath }".` );
  17. }
  18. const snippetConfig = readSnippetConfig( data.snippetSource.js );
  19. const outputPath = path.join( data.outputPath, data.snippetPath );
  20. const webpackConfig = getWebpackConfig( {
  21. entry: data.snippetSource.js,
  22. outputPath,
  23. language: snippetConfig.language,
  24. minify: data.options.production
  25. } );
  26. let promise;
  27. // See #530.
  28. if ( webpackProcesses.has( outputPath ) ) {
  29. promise = webpackProcesses.get( outputPath );
  30. } else {
  31. promise = runWebpack( webpackConfig );
  32. webpackProcesses.set( outputPath, promise );
  33. }
  34. return promise
  35. .then( () => {
  36. const wasCSSGenerated = fs.existsSync( path.join( outputPath, 'snippet.css' ) );
  37. const cssFiles = [
  38. path.join( data.basePath, 'assets', 'snippet-styles.css' )
  39. ];
  40. // CSS may not be generated by Webpack if a snippet's JS file didn't import any SCSS files.
  41. if ( wasCSSGenerated ) {
  42. cssFiles.unshift( path.join( data.relativeOutputPath, data.snippetPath, 'snippet.css' ) );
  43. }
  44. // If the snippet is a dependency of a parent snippet, append JS and CSS to HTML and save to disk.
  45. if ( data.isDependency ) {
  46. let htmlFile = fs.readFileSync( data.snippetSource.html ).toString();
  47. if ( wasCSSGenerated ) {
  48. htmlFile += '<link rel="stylesheet" href="snippet.css" type="text/css">';
  49. }
  50. htmlFile += '<script src="snippet.js"></script>';
  51. fs.writeFileSync( path.join( outputPath, 'snippet.html' ), htmlFile );
  52. }
  53. return {
  54. html: fs.readFileSync( data.snippetSource.html ),
  55. assets: {
  56. js: [
  57. path.join( data.relativeOutputPath, data.snippetPath, 'snippet.js' )
  58. ],
  59. css: cssFiles
  60. },
  61. dependencies: snippetConfig.dependencies
  62. };
  63. } );
  64. };
  65. function getWebpackConfig( config ) {
  66. const plugins = [
  67. new ExtractTextPlugin( 'snippet.css' ),
  68. new CKEditorWebpackPlugin( {
  69. language: config.language || 'en'
  70. } ),
  71. new webpack.BannerPlugin( {
  72. banner: bundler.getLicenseBanner(),
  73. raw: true
  74. } )
  75. ];
  76. if ( config.minify ) {
  77. plugins.push(
  78. new BabelMinifyPlugin( null, {
  79. comments: false
  80. } )
  81. );
  82. }
  83. return {
  84. devtool: 'source-map',
  85. entry: config.entry,
  86. output: {
  87. path: config.outputPath,
  88. filename: 'snippet.js'
  89. },
  90. plugins,
  91. // Configure the paths so building CKEditor 5 snippets work even if the script
  92. // is triggered from a directory outside ckeditor5 (e.g. multi-project case).
  93. resolve: {
  94. modules: getModuleResolvePaths()
  95. },
  96. resolveLoader: {
  97. modules: getModuleResolvePaths()
  98. },
  99. module: {
  100. rules: [
  101. {
  102. test: /\.svg$/,
  103. use: [ 'raw-loader' ]
  104. },
  105. {
  106. test: /\.css$/,
  107. use: ExtractTextPlugin.extract( {
  108. fallback: 'style-loader',
  109. use: [
  110. {
  111. loader: 'postcss-loader',
  112. options: getPostCssConfig( {
  113. themeImporter: {
  114. themePath: require.resolve( '@ckeditor/ckeditor5-theme-lark' )
  115. },
  116. minify: config.minify
  117. } )
  118. }
  119. ]
  120. } )
  121. }
  122. ]
  123. }
  124. };
  125. }
  126. function runWebpack( webpackConfig ) {
  127. return new Promise( ( resolve, reject ) => {
  128. webpack( webpackConfig, ( err, stats ) => {
  129. if ( err ) {
  130. reject( err );
  131. } else if ( stats.hasErrors() ) {
  132. reject( new Error( stats.toString() ) );
  133. } else {
  134. resolve();
  135. }
  136. } );
  137. } );
  138. }
  139. function getModuleResolvePaths() {
  140. return [
  141. path.resolve( __dirname, '..', '..', 'node_modules' ),
  142. 'node_modules'
  143. ];
  144. }
  145. function readSnippetConfig( snippetSourcePath ) {
  146. const snippetSource = fs.readFileSync( snippetSourcePath ).toString();
  147. const configSourceMatch = snippetSource.match( /\n\/\* config ([\s\S]+?)\*\// );
  148. if ( !configSourceMatch ) {
  149. return {};
  150. }
  151. return JSON.parse( configSourceMatch[ 1 ] );
  152. }