285 lines
7.9 KiB
JavaScript
285 lines
7.9 KiB
JavaScript
import parser from 'postcss-values-parser';
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import fs from 'fs';
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import path from 'path';
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import postcss from 'postcss';
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function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
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try {
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var info = gen[key](arg);
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var value = info.value;
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} catch (error) {
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reject(error);
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return;
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}
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if (info.done) {
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resolve(value);
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} else {
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Promise.resolve(value).then(_next, _throw);
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}
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}
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function _asyncToGenerator(fn) {
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return function () {
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var self = this,
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args = arguments;
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return new Promise(function (resolve, reject) {
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var gen = fn.apply(self, args);
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function _next(value) {
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asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value);
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}
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function _throw(err) {
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asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err);
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}
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_next(undefined);
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});
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};
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}
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const dashedMatch = /^--/; // returns the value of a css function as a string
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var getFnValue = (node => {
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const value = String(node.nodes.slice(1, -1));
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return dashedMatch.test(value) ? value : undefined;
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});
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var updateEnvValue = ((node, variables) => {
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// get the value of a css function as a string
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const value = getFnValue(node);
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if (typeof value === 'string' && value in variables) {
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node.replaceWith(...asClonedArrayWithBeforeSpacing(variables[value], node.raws.before));
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}
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}); // return an array with its nodes cloned, preserving the raw
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const asClonedArrayWithBeforeSpacing = (array, beforeSpacing) => {
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const clonedArray = asClonedArray(array, null);
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if (clonedArray[0]) {
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clonedArray[0].raws.before = beforeSpacing;
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}
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return clonedArray;
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}; // return an array with its nodes cloned
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const asClonedArray = (array, parent) => array.map(node => asClonedNode(node, parent)); // return a cloned node
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const asClonedNode = (node, parent) => {
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const cloneNode = new node.constructor(node);
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for (const key in node) {
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if (key === 'parent') {
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cloneNode.parent = parent;
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} else if (Object(node[key]).constructor === Array) {
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cloneNode[key] = asClonedArray(node.nodes, cloneNode);
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} else if (Object(node[key]).constructor === Object) {
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cloneNode[key] = Object.assign({}, node[key]);
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}
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}
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return cloneNode;
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};
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// returns whether a node is a css env() function
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var isEnvFunc = (node => node && node.type === 'func' && node.value === 'env');
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function walk(node, fn) {
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node.nodes.slice(0).forEach(childNode => {
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if (childNode.nodes) {
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walk(childNode, fn);
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}
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if (isEnvFunc(childNode)) {
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fn(childNode);
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}
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});
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}
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var getReplacedValue = ((originalValue, variables) => {
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// get the ast of the original value
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const ast = parser(originalValue).parse(); // walk all of the css env() functions
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walk(ast, node => {
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// update the environment value for the css env() function
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updateEnvValue(node, variables);
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}); // return the stringified ast
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return String(ast);
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});
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// returns whether a node is an at-rule
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var isAtrule = (node => node && node.type === 'atrule');
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// returns whether a node is a declaration
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var isDecl = (node => node && node.type === 'decl');
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var getSupportedValue = (node => isAtrule(node) && node.params || isDecl(node) && node.value);
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function setSupportedValue (node, value) {
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if (isAtrule(node)) {
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node.params = value;
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}
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if (isDecl(node)) {
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node.value = value;
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}
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}
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/* Import Custom Properties from Object
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/* ========================================================================== */
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function importEnvironmentVariablesFromObject(object) {
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const environmentVariables = Object.assign({}, Object(object).environmentVariables || Object(object)['environment-variables']);
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for (const key in environmentVariables) {
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environmentVariables[key] = parser(environmentVariables[key]).parse().nodes;
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}
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return environmentVariables;
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}
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/* Import Custom Properties from JSON file
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/* ========================================================================== */
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function importEnvironmentVariablesFromJSONFile(_x) {
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return _importEnvironmentVariablesFromJSONFile.apply(this, arguments);
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}
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/* Import Custom Properties from JS file
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/* ========================================================================== */
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function _importEnvironmentVariablesFromJSONFile() {
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_importEnvironmentVariablesFromJSONFile = _asyncToGenerator(function* (from) {
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const object = yield readJSON(path.resolve(from));
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return importEnvironmentVariablesFromObject(object);
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});
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return _importEnvironmentVariablesFromJSONFile.apply(this, arguments);
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}
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function importEnvironmentVariablesFromJSFile(_x2) {
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return _importEnvironmentVariablesFromJSFile.apply(this, arguments);
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}
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/* Import Custom Properties from Sources
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/* ========================================================================== */
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function _importEnvironmentVariablesFromJSFile() {
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_importEnvironmentVariablesFromJSFile = _asyncToGenerator(function* (from) {
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const object = yield import(path.resolve(from));
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return importEnvironmentVariablesFromObject(object);
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});
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return _importEnvironmentVariablesFromJSFile.apply(this, arguments);
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}
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function importEnvironmentVariablesFromSources(sources) {
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return sources.map(source => {
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if (source instanceof Promise) {
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return source;
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} else if (source instanceof Function) {
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return source();
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} // read the source as an object
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const opts = source === Object(source) ? source : {
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from: String(source)
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}; // skip objects with Custom Properties
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if (opts.environmentVariables || opts['environment-variables']) {
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return opts;
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} // source pathname
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const from = String(opts.from || ''); // type of file being read from
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const type = (opts.type || path.extname(from).slice(1)).toLowerCase();
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return {
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type,
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from
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};
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}).reduce(
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/*#__PURE__*/
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function () {
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var _ref = _asyncToGenerator(function* (environmentVariables, source) {
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const _ref2 = yield source,
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type = _ref2.type,
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from = _ref2.from;
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if (type === 'js') {
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return Object.assign(environmentVariables, (yield importEnvironmentVariablesFromJSFile(from)));
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}
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if (type === 'json') {
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return Object.assign(environmentVariables, (yield importEnvironmentVariablesFromJSONFile(from)));
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}
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return Object.assign(environmentVariables, importEnvironmentVariablesFromObject((yield source)));
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});
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return function (_x3, _x4) {
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return _ref.apply(this, arguments);
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};
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}(), {});
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}
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/* Helper utilities
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/* ========================================================================== */
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const readFile = from => new Promise((resolve, reject) => {
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fs.readFile(from, 'utf8', (error, result) => {
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if (error) {
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reject(error);
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} else {
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resolve(result);
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}
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});
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});
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const readJSON =
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/*#__PURE__*/
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function () {
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var _ref3 = _asyncToGenerator(function* (from) {
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return JSON.parse((yield readFile(from)));
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});
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return function readJSON(_x5) {
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return _ref3.apply(this, arguments);
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};
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}();
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var index = postcss.plugin('postcss-env-fn', opts => {
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// sources to import environment variables from
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const importFrom = [].concat(Object(opts).importFrom || []); // promise any environment variables are imported
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const environmentVariablesPromise = importEnvironmentVariablesFromSources(importFrom);
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return (
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/*#__PURE__*/
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function () {
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var _ref = _asyncToGenerator(function* (root) {
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const environmentVariables = yield environmentVariablesPromise;
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root.walk(node => {
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const supportedValue = getSupportedValue(node);
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if (supportedValue) {
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const replacedValue = getReplacedValue(supportedValue, environmentVariables);
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if (replacedValue !== supportedValue) {
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setSupportedValue(node, replacedValue);
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}
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}
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});
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});
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return function (_x) {
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return _ref.apply(this, arguments);
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};
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}()
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);
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});
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export default index;
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//# sourceMappingURL=index.es.mjs.map
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