postcss-import-parser.js
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _postcss = _interopRequireDefault(require("postcss"));
var _postcssValueParser = _interopRequireDefault(require("postcss-value-parser"));
var _loaderUtils = require("loader-utils");
var _utils = require("../utils");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
const pluginName = 'postcss-import-parser';
var _default = _postcss.default.plugin(pluginName, options => (css, result) => {
const importsMap = new Map();
css.walkAtRules(/^import$/i, atRule => {
// Convert only top-level @import
if (atRule.parent.type !== 'root') {
return;
} // Nodes do not exists - `@import url('http://') :root {}`
if (atRule.nodes) {
result.warn("It looks like you didn't end your @import statement correctly. Child nodes are attached to it.", {
node: atRule
});
return;
}
const {
nodes
} = (0, _postcssValueParser.default)(atRule.params); // No nodes - `@import ;`
// Invalid type - `@import foo-bar;`
if (nodes.length === 0 || nodes[0].type !== 'string' && nodes[0].type !== 'function') {
result.warn(`Unable to find uri in "${atRule.toString()}"`, {
node: atRule
});
return;
}
let isStringValue;
let url;
if (nodes[0].type === 'string') {
isStringValue = true;
url = nodes[0].value;
} else if (nodes[0].type === 'function') {
// Invalid function - `@import nourl(test.css);`
if (nodes[0].value.toLowerCase() !== 'url') {
result.warn(`Unable to find uri in "${atRule.toString()}"`, {
node: atRule
});
return;
}
isStringValue = nodes[0].nodes.length !== 0 && nodes[0].nodes[0].type === 'string';
url = isStringValue ? nodes[0].nodes[0].value : _postcssValueParser.default.stringify(nodes[0].nodes);
} // Empty url - `@import "";` or `@import url();`
if (url.trim().length === 0) {
result.warn(`Unable to find uri in "${atRule.toString()}"`, {
node: atRule
});
return;
}
const isRequestable = (0, _loaderUtils.isUrlRequest)(url);
if (isRequestable) {
url = (0, _utils.normalizeUrl)(url, isStringValue); // Empty url after normalize - `@import '\
// \
// \
// ';
if (url.trim().length === 0) {
result.warn(`Unable to find uri in "${atRule.toString()}"`, {
node: atRule
});
return;
}
}
const media = _postcssValueParser.default.stringify(nodes.slice(1)).trim().toLowerCase();
if (options.filter && !options.filter({
url,
media
})) {
return;
}
atRule.remove();
if (isRequestable) {
const importKey = url;
let importName = importsMap.get(importKey);
if (!importName) {
importName = `___CSS_LOADER_AT_RULE_IMPORT_${importsMap.size}___`;
importsMap.set(importKey, importName);
result.messages.push({
type: 'import',
value: {
importName,
url: options.urlHandler ? options.urlHandler(url) : url
}
});
}
result.messages.push({
type: 'api-import',
value: {
type: 'internal',
importName,
media
}
});
return;
}
result.messages.push({
pluginName,
type: 'api-import',
value: {
type: 'external',
url,
media
}
});
});
});
exports.default = _default;