snowpack-plugin-less/dist/index.js

Use the Less compiler to build .less files from source

"use strict";
const tslib_1 = require("tslib");
const fs = tslib_1.__importStar(require("fs"));
const render_1 = require("./render");
const pkg = require('../package.json');
const plugin = (snowpackConfig, options = {}) => {
    const importedByMap = new Map();
    function addImportsToMap(filePath, importedPath) {
        const importedBy = importedByMap.get(importedPath);
        if (importedBy) {
            importedBy.add(filePath);
        }
        else {
            importedByMap.set(importedPath, new Set([filePath]));
        }
    }
    return {
        name: pkg.name,
        resolve: {
            input: ['.less'],
            output: ['.css'],
        },
        onChange({ filePath }) {
            if (importedByMap.has(filePath)) {
                const importedBy = importedByMap.get(filePath);
                importedByMap.delete(filePath);
                if (this.markChanged) {
                    for (const importerFilePath of importedBy) {
                        this.markChanged(importerFilePath);
                    }
                }
            }
        },
        load({ filePath, isDev }) {
            return tslib_1.__awaiter(this, void 0, void 0, function* () {
                try {
                    const content = yield fs.promises.readFile(filePath, 'utf-8');
                    const result = yield render_1.render(content, Object.assign(Object.assign({}, options), { filename: filePath }));
                    if (isDev) {
                        result.imports.forEach((importedPath) => addImportsToMap(filePath, importedPath));
                    }
                    return {
                        '.css': {
                            code: result.css,
                        },
                    };
                }
                catch (err) {
                    console.error(err);
                }
            });
        },
    };
};
module.exports = plugin;