@mypaas/hcm-cli/lib/compiler/compile-less.js

Vant Cli 是一个 Vue 组件库构建工具，通过 Vant Cli 可以快速搭建一套功能完备的 Vue 组件库。

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.compileLess = void 0;
const less_1 = require("less");
const fs_extra_1 = require("fs-extra");
// less plugin to resolve tilde
class TildeResolver extends less_1.FileManager {
    loadFile(filename, ...args) {
        filename = filename.replace('~', '');
        return less_1.FileManager.prototype.loadFile.apply(this, [filename, ...args]);
    }
}
const TildeResolverPlugin = {
    install(lessInstance, pluginManager) {
        pluginManager.addFileManager(new TildeResolver());
    }
};
const CssVarOperationPlugin = {
    install({ tree: { Call, Anonymous, Expression }, visitors }, pluginManager) {
        const call = (name, ...args) => new Call(name, [new Expression(args)]);
        class Visitor {
            constructor() {
                this.native = new visitors.Visitor(this);
                this.isPreEvalVisitor = true;
                this.isReplacing = true;
            }
            run(root) {
                return this.native.visit(root);
            }
            visitOperation(node) {
                return call('calc', node.operands[0], new Anonymous(node.op), node.operands[1]);
            }
            visitNegative(node) {
                return call('calc', new Anonymous('-1'), new Anonymous('*'), node.value);
            }
        }
        pluginManager.addVisitor(new Visitor());
    }
};
async function compileLess(filePath) {
    const source = fs_extra_1.readFileSync(filePath, 'utf-8');
    const { css } = await less_1.render(source, {
        filename: filePath,
        plugins: [TildeResolverPlugin, CssVarOperationPlugin]
    });
    return css;
}
exports.compileLess = compileLess;