simple-squiggle

A restricted subset of Squiggle
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DirectoryExistsPlugin.js (1697B)

      1 /*
      2 	MIT License http://www.opensource.org/licenses/mit-license.php
      3 	Author Tobias Koppers @sokra
      4 */
      5 
      6 "use strict";
      7 
      8 /** @typedef {import("./Resolver")} Resolver */
      9 /** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
     10 
     11 module.exports = class DirectoryExistsPlugin {
     12 	/**
     13 	 * @param {string | ResolveStepHook} source source
     14 	 * @param {string | ResolveStepHook} target target
     15 	 */
     16 	constructor(source, target) {
     17 		this.source = source;
     18 		this.target = target;
     19 	}
     20 
     21 	/**
     22 	 * @param {Resolver} resolver the resolver
     23 	 * @returns {void}
     24 	 */
     25 	apply(resolver) {
     26 		const target = resolver.ensureHook(this.target);
     27 		resolver
     28 			.getHook(this.source)
     29 			.tapAsync(
     30 				"DirectoryExistsPlugin",
     31 				(request, resolveContext, callback) => {
     32 					const fs = resolver.fileSystem;
     33 					const directory = request.path;
     34 					if (!directory) return callback();
     35 					fs.stat(directory, (err, stat) => {
     36 						if (err || !stat) {
     37 							if (resolveContext.missingDependencies)
     38 								resolveContext.missingDependencies.add(directory);
     39 							if (resolveContext.log)
     40 								resolveContext.log(directory + " doesn't exist");
     41 							return callback();
     42 						}
     43 						if (!stat.isDirectory()) {
     44 							if (resolveContext.missingDependencies)
     45 								resolveContext.missingDependencies.add(directory);
     46 							if (resolveContext.log)
     47 								resolveContext.log(directory + " is not a directory");
     48 							return callback();
     49 						}
     50 						if (resolveContext.fileDependencies)
     51 							resolveContext.fileDependencies.add(directory);
     52 						resolver.doResolve(
     53 							target,
     54 							request,
     55 							`existing directory ${directory}`,
     56 							resolveContext,
     57 							callback
     58 						);
     59 					});
     60 				}
     61 			);
     62 	}
     63 };