@angular-devkit/build-angular
Version:
Angular Webpack Build Facade
127 lines • 13.5 kB
JavaScript
;
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.LessStylesheetLanguage = void 0;
const promises_1 = require("node:fs/promises");
/**
* The lazy-loaded instance of the less stylesheet preprocessor.
* It is only imported and initialized if a less stylesheet is used.
*/
let lessPreprocessor;
function isLessException(error) {
return !!error && typeof error === 'object' && 'column' in error;
}
exports.LessStylesheetLanguage = Object.freeze({
name: 'less',
componentFilter: /^less;/,
fileFilter: /\.less$/,
process(data, file, _, options, build) {
return compileString(data, file, options, build.resolve.bind(build));
},
});
async function compileString(data, filename, options, resolver) {
const less = (lessPreprocessor ?? (lessPreprocessor = (await Promise.resolve().then(() => __importStar(require('less')))).default));
const resolverPlugin = {
install({ FileManager }, pluginManager) {
const resolverFileManager = new (class extends FileManager {
supportsSync() {
return false;
}
supports() {
return true;
}
async loadFile(filename, currentDirectory, options, environment) {
// Attempt direct loading as a relative path to avoid resolution overhead
try {
return await super.loadFile(filename, currentDirectory, options, environment);
}
catch (error) {
// Attempt a full resolution if not found
const fullResult = await resolver(filename, {
kind: 'import-rule',
resolveDir: currentDirectory,
});
if (fullResult.path) {
return {
filename: fullResult.path,
contents: await (0, promises_1.readFile)(fullResult.path, 'utf-8'),
};
}
// Otherwise error by throwing the failing direct result
throw error;
}
}
})();
pluginManager.addFileManager(resolverFileManager);
},
};
try {
const result = await less.render(data, {
filename,
paths: options.includePaths,
plugins: [resolverPlugin],
rewriteUrls: 'all',
sourceMap: options.sourcemap
? {
sourceMapFileInline: true,
outputSourceFiles: true,
}
: undefined,
});
return {
contents: result.css,
loader: 'css',
watchFiles: [filename, ...result.imports],
};
}
catch (error) {
if (isLessException(error)) {
return {
errors: [
{
text: error.message,
location: {
file: error.filename,
line: error.line,
column: error.column,
// Middle element represents the line containing the error
lineText: error.extract && error.extract[Math.trunc(error.extract.length / 2)],
},
},
],
loader: 'css',
};
}
throw error;
}
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport type { OnLoadResult, PluginBuild } from 'esbuild';\nimport { readFile } from 'node:fs/promises';\nimport { StylesheetLanguage, StylesheetPluginOptions } from './stylesheet-plugin-factory';\n\n/**\n * The lazy-loaded instance of the less stylesheet preprocessor.\n * It is only imported and initialized if a less stylesheet is used.\n */\nlet lessPreprocessor: typeof import('less') | undefined;\n\ninterface LessException extends Error {\n  filename: string;\n  line: number;\n  column: number;\n  extract?: string[];\n}\n\nfunction isLessException(error: unknown): error is LessException {\n  return !!error && typeof error === 'object' && 'column' in error;\n}\n\nexport const LessStylesheetLanguage = Object.freeze<StylesheetLanguage>({\n  name: 'less',\n  componentFilter: /^less;/,\n  fileFilter: /\\.less$/,\n  process(data, file, _, options, build) {\n    return compileString(data, file, options, build.resolve.bind(build));\n  },\n});\n\nasync function compileString(\n  data: string,\n  filename: string,\n  options: StylesheetPluginOptions,\n  resolver: PluginBuild['resolve'],\n): Promise<OnLoadResult> {\n  const less = (lessPreprocessor ??= (await import('less')).default);\n\n  const resolverPlugin: Less.Plugin = {\n    install({ FileManager }, pluginManager): void {\n      const resolverFileManager = new (class extends FileManager {\n        override supportsSync(): boolean {\n          return false;\n        }\n\n        override supports(): boolean {\n          return true;\n        }\n\n        override async loadFile(\n          filename: string,\n          currentDirectory: string,\n          options: Less.LoadFileOptions,\n          environment: Less.Environment,\n        ): Promise<Less.FileLoadResult> {\n          // Attempt direct loading as a relative path to avoid resolution overhead\n          try {\n            return await super.loadFile(filename, currentDirectory, options, environment);\n          } catch (error) {\n            // Attempt a full resolution if not found\n            const fullResult = await resolver(filename, {\n              kind: 'import-rule',\n              resolveDir: currentDirectory,\n            });\n            if (fullResult.path) {\n              return {\n                filename: fullResult.path,\n                contents: await readFile(fullResult.path, 'utf-8'),\n              };\n            }\n            // Otherwise error by throwing the failing direct result\n            throw error;\n          }\n        }\n      })();\n\n      pluginManager.addFileManager(resolverFileManager);\n    },\n  };\n\n  try {\n    const result = await less.render(data, {\n      filename,\n      paths: options.includePaths,\n      plugins: [resolverPlugin],\n      rewriteUrls: 'all',\n      sourceMap: options.sourcemap\n        ? {\n            sourceMapFileInline: true,\n            outputSourceFiles: true,\n          }\n        : undefined,\n    } as Less.Options);\n\n    return {\n      contents: result.css,\n      loader: 'css',\n      watchFiles: [filename, ...result.imports],\n    };\n  } catch (error) {\n    if (isLessException(error)) {\n      return {\n        errors: [\n          {\n            text: error.message,\n            location: {\n              file: error.filename,\n              line: error.line,\n              column: error.column,\n              // Middle element represents the line containing the error\n              lineText: error.extract && error.extract[Math.trunc(error.extract.length / 2)],\n            },\n          },\n        ],\n        loader: 'css',\n      };\n    }\n\n    throw error;\n  }\n}\n"]}