honkit/lib/cli/watch.js

HonKit is building beautiful books using Markdown.

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const path_1 = __importDefault(require("path"));
const chokidar_1 = __importDefault(require("chokidar"));
const parsers_1 = __importDefault(require("../parsers"));
/**
 * Watch a folder and call callback when a file is modified
 *
 * @param {WatchOptions} options
 * @return {FSWatcher} The chokidar watcher instance
 */
function watch(options) {
    const { callback, outputFolder } = options;
    const dir = path_1.default.resolve(options.watchDir);
    const toWatch = ["book.json", "book.js", "_layouts/**"];
    // Watch all parsable files
    parsers_1.default.extensions.forEach((ext) => {
        toWatch.push(`**/*${ext}`);
    });
    // Build ignored patterns
    // Always ignore _book and node_modules
    // https://github.com/honkit/honkit/issues/269
    const ignored = ["_book/**", "node_modules/**"];
    // If a custom output folder is specified, ignore it too
    // This prevents infinite rebuild loops when output folder is inside the watched directory
    // https://github.com/honkit/honkit/issues/491
    if (outputFolder) {
        // Convert to forward slashes for glob pattern (Windows compatibility)
        const outputRelative = path_1.default.relative(dir, path_1.default.resolve(dir, outputFolder)).replace(/\\/g, "/");
        // Only add to ignored if the output folder is inside the watched directory
        if (outputRelative && !outputRelative.startsWith("..") && !path_1.default.isAbsolute(outputRelative)) {
            ignored.push(`${outputRelative}/**`);
        }
    }
    const watcher = chokidar_1.default.watch(toWatch, {
        cwd: dir,
        ignored: ignored,
        ignoreInitial: true
    });
    watcher.on("all", (eventType, filepath) => {
        callback(null, path_1.default.resolve(dir, filepath), eventType);
    });
    watcher.on("error", (err) => {
        callback(err);
    });
    return watcher;
}
exports.default = watch;