172 lines
No EOL
5.5 KiB
JavaScript
Executable file
172 lines
No EOL
5.5 KiB
JavaScript
Executable file
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = loader;
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var _path = _interopRequireDefault(require("path"));
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var _package = _interopRequireDefault(require("postcss/package.json"));
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var _options = _interopRequireDefault(require("./options.json"));
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var _utils = require("./utils");
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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let hasExplicitDependencyOnPostCSS = false;
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/**
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* **PostCSS Loader**
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*
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* Loads && processes CSS with [PostCSS](https://github.com/postcss/postcss)
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*
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* @method loader
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*
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* @param {String} content Source
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* @param {Object} sourceMap Source Map
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* @param {Object} meta Meta
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*
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* @return {callback} callback Result
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*/
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async function loader(content, sourceMap, meta) {
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const options = this.getOptions(_options.default);
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const callback = this.async();
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const configOption = typeof options.postcssOptions === "undefined" || typeof options.postcssOptions.config === "undefined" ? true : options.postcssOptions.config;
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let implementation;
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try {
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implementation = (0, _utils.getPostcssImplementation)(this, options.implementation);
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} catch (error) {
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callback(error);
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return;
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}
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if (!implementation) {
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callback(new Error(`The Postcss implementation "${options.implementation}" not found`));
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return;
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}
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let loadedConfig;
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if (configOption) {
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try {
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loadedConfig = await (0, _utils.loadConfig)(this, configOption, options.postcssOptions);
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} catch (error) {
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callback(error);
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return;
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}
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}
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const {
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plugins,
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processOptions
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} = await (0, _utils.getPostcssOptions)(this, loadedConfig, options.postcssOptions);
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const useSourceMap = typeof options.sourceMap !== "undefined" ? options.sourceMap : this.sourceMap;
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if (useSourceMap) {
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processOptions.map = {
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inline: false,
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annotation: false,
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...processOptions.map
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};
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}
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if (sourceMap && processOptions.map) {
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processOptions.map.prev = (0, _utils.normalizeSourceMap)(sourceMap, this.context);
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}
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let root;
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// Reuse PostCSS AST from other loaders
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if (meta && meta.ast && meta.ast.type === "postcss" &&
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// eslint-disable-next-line global-require
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require("semver").satisfies(meta.ast.version, `^${_package.default.version}`)) {
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({
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root
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} = meta.ast);
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}
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if (!root && options.execute) {
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// eslint-disable-next-line no-param-reassign
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content = (0, _utils.exec)(content, this);
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}
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let result;
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let processor;
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try {
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processor = implementation(plugins);
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result = await processor.process(root || content, processOptions);
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} catch (error) {
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// Check postcss versions to avoid using PostCSS 7.
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// For caching reasons, we use the readFileSync and existsSync functions from the context,
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// not the functions from the `fs` module.
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if (!hasExplicitDependencyOnPostCSS && processor && processor.version && processor.version.startsWith("7.")) {
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// The `findPackageJsonDir` function returns `string` or `null`.
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// This is used to do for caching, that is, an explicit comparison with `undefined`
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// is used to make the condition body run once.
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const packageJSONDir = (0, _utils.findPackageJSONDir)(process.cwd(), this.fs.statSync);
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if (packageJSONDir) {
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let bufferOfPackageJSON;
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try {
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bufferOfPackageJSON = this.fs.readFileSync(_path.default.resolve(packageJSONDir, "package.json"), "utf8");
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} catch (_error) {
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// Nothing
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}
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if (bufferOfPackageJSON) {
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let pkg;
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try {
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pkg = JSON.parse(bufferOfPackageJSON);
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} catch (_error) {
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// Nothing
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}
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if (pkg) {
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const {
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dependencies = {},
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devDependencies = {}
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} = pkg;
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if (!dependencies.postcss && !devDependencies.postcss) {
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this.emitWarning(new Error("Add postcss as project dependency. postcss is not a peer dependency for postcss-loader. " + "Use `npm install postcss` or `yarn add postcss`"));
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} else {
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hasExplicitDependencyOnPostCSS = true;
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}
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}
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}
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}
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}
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(0, _utils.reportError)(this, callback, error);
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return;
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}
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for (const warning of result.warnings()) {
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this.emitWarning((0, _utils.warningFactory)(warning));
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}
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for (const message of result.messages) {
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// eslint-disable-next-line default-case
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switch (message.type) {
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case "dependency":
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this.addDependency(message.file);
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break;
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case "build-dependency":
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this.addBuildDependency(message.file);
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break;
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case "missing-dependency":
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this.addMissingDependency(message.file);
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break;
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case "context-dependency":
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this.addContextDependency(message.file);
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break;
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case "dir-dependency":
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this.addContextDependency(message.dir);
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break;
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case "asset":
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if (message.content && message.file) {
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this.emitFile(message.file, message.content, message.sourceMap, message.info);
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}
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}
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}
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// eslint-disable-next-line no-undefined
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let map = result.map ? result.map.toJSON() : undefined;
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if (map && useSourceMap) {
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map = (0, _utils.normalizeSourceMapAfterPostcss)(map, this.context);
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}
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let ast;
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try {
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ast = {
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type: "postcss",
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version: result.processor.version,
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root: result.root
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};
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} catch (error) {
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(0, _utils.reportError)(this, callback, error);
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return;
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}
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callback(null, result.css, map, {
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ast
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});
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} |