@yinxulai/babel-plugin-less
Version:
一个 `Babel` 插件，用来帮助你对文件中引用的 `less` 进行预处理、转换成 `css` 并自动管理, 支持 `cssModule`, `autoPrefix`
142 lines • 7.27 kB
JavaScript
;
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __rest = (this && this.__rest) || function (s, e) {
var t = {};
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
t[p] = s[p];
if (s != null && typeof Object.getOwnPropertySymbols === "function")
for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
t[p[i]] = s[p[i]];
}
return t;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var path_1 = __importDefault(require("path"));
var less_1 = __importDefault(require("less"));
var postcss_1 = __importDefault(require("postcss"));
var cssnano_1 = __importDefault(require("cssnano"));
var fs_1 = require("fs");
var autoprefixer_1 = __importDefault(require("autoprefixer"));
var postcss_modules_1 = __importDefault(require("postcss-modules"));
var optionsArgs = process.argv.slice(2);
var options = JSON.parse(optionsArgs[0]);
// 预处理语法
function transformStyleSyntax(source, options) {
return __awaiter(this, void 0, void 0, function () {
var data;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, less_1.default.render(source, options)];
case 1:
data = _a.sent();
return [2 /*return*/, data.css || ''];
}
});
});
}
// 处理 css module, 同时会补充浏览器前缀
function transformStyleByPostCss(source, options) {
return __awaiter(this, void 0, void 0, function () {
var result, plugins, cssModule, autoPrefix, postcssOptions, options_1, postcssResult;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
result = {};
plugins = [];
cssModule = options.cssModule, autoPrefix = options.autoPrefix, postcssOptions = __rest(options, ["cssModule", "autoPrefix"]);
plugins.push(cssnano_1.default());
// 开启补充浏览器前缀
if (autoPrefix) {
plugins.push(autoprefixer_1.default());
}
// 开启 css Module
if (cssModule) {
// 如果开启了 cssModule
// 保证一定有 tokens 对象
// 因为使用者会调用 style.className
result.tokens = {};
options_1 = __assign(__assign({}, (typeof cssModule === 'object' ? cssModule : {})), { getJSON: function (_, token) { return result.tokens = token || {}; } });
plugins.push(postcss_modules_1.default(options_1));
}
return [4 /*yield*/, postcss_1.default(plugins)
.process(source || '', postcssOptions)];
case 1:
postcssResult = _a.sent();
result.css = postcssResult.css;
return [2 /*return*/, result];
}
});
});
}
function transform() {
return __awaiter(this, void 0, void 0, function () {
var fileName, cssModule, dirname, source, styleString;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
fileName = options.fileName, cssModule = options.cssModule;
dirname = path_1.default.dirname(fileName);
source = fs_1.readFileSync(fileName).toString();
return [4 /*yield*/, transformStyleSyntax(source, { paths: [dirname] })];
case 1:
styleString = _a.sent();
return [4 /*yield*/, transformStyleByPostCss(styleString, { from: fileName, autoPrefix: true, cssModule: cssModule })];
case 2: return [2 /*return*/, _a.sent()];
}
});
});
}
transform()
.catch(function (error) { return console.error(JSON.stringify(error)); })
.then(function (result) { return console.log(JSON.stringify(result)); });
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