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node_modules/postcss-modules/build/css-loader-core/loader.js
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121
node_modules/postcss-modules/build/css-loader-core/loader.js
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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var _postcss = require("postcss");
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var _postcss2 = _interopRequireDefault(_postcss);
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var _fs = require("fs");
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var _fs2 = _interopRequireDefault(_fs);
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var _path = require("path");
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var _path2 = _interopRequireDefault(_path);
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var _parser = require("./parser");
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var _parser2 = _interopRequireDefault(_parser);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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// Copied from https://github.com/css-modules/css-modules-loader-core
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class Core {
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constructor(plugins) {
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this.plugins = plugins || Core.defaultPlugins;
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}
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load(sourceString, sourcePath, trace, pathFetcher) {
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let parser = new _parser2.default(pathFetcher, trace);
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return (0, _postcss2.default)(this.plugins.concat([parser.plugin()])).process(sourceString, { from: "/" + sourcePath }).then(result => {
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return {
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injectableSource: result.css,
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exportTokens: parser.exportTokens
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};
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});
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}
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}
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// Sorts dependencies in the following way:
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// AAA comes before AA and A
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// AB comes after AA and before A
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// All Bs come after all As
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// This ensures that the files are always returned in the following order:
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// - In the order they were required, except
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// - After all their dependencies
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const traceKeySorter = (a, b) => {
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if (a.length < b.length) {
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return a < b.substring(0, a.length) ? -1 : 1;
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} else if (a.length > b.length) {
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return a.substring(0, b.length) <= b ? -1 : 1;
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} else {
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return a < b ? -1 : 1;
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}
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};
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class FileSystemLoader {
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constructor(root, plugins) {
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this.root = root;
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this.sources = {};
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this.traces = {};
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this.importNr = 0;
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this.core = new Core(plugins);
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this.tokensByFile = {};
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}
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fetch(_newPath, relativeTo, _trace) {
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let newPath = _newPath.replace(/^["']|["']$/g, ""),
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trace = _trace || String.fromCharCode(this.importNr++);
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return new Promise((resolve, reject) => {
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let relativeDir = _path2.default.dirname(relativeTo),
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rootRelativePath = _path2.default.resolve(relativeDir, newPath),
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fileRelativePath = _path2.default.resolve(_path2.default.join(this.root, relativeDir), newPath);
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// if the path is not relative or absolute, try to resolve it in node_modules
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if (newPath[0] !== "." && newPath[0] !== "/") {
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try {
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fileRelativePath = require.resolve(newPath);
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} catch (e) {
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// noop
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}
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}
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const tokens = this.tokensByFile[fileRelativePath];
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if (tokens) {
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return resolve(tokens);
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}
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_fs2.default.readFile(fileRelativePath, "utf-8", (err, source) => {
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if (err) reject(err);
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this.core.load(source, rootRelativePath, trace, this.fetch.bind(this)).then(({ injectableSource, exportTokens }) => {
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this.sources[fileRelativePath] = injectableSource;
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this.traces[trace] = fileRelativePath;
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this.tokensByFile[fileRelativePath] = exportTokens;
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resolve(exportTokens);
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}, reject);
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});
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});
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}
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get finalSource() {
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const traces = this.traces;
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const sources = this.sources;
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let written = new Set();
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return Object.keys(traces).sort(traceKeySorter).map(key => {
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const filename = traces[key];
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if (written.has(filename)) {
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return null;
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}
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written.add(filename);
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return sources[filename];
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}).join("");
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}
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}
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exports.default = FileSystemLoader;
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