Skip to content
Permalink
9bfb9ba527
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Go to file
 
 
Cannot retrieve contributors at this time
170 lines (158 sloc) 4.15 KB
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const forEachBail = require("./forEachBail");
/** @typedef {import("./Resolver")} Resolver */
/** @typedef {import("./Resolver").ResolveContext} ResolveContext */
/**
* @typedef {Object} DescriptionFileInfo
* @property {any=} content
* @property {string} path
* @property {string} directory
*/
/**
* @callback ErrorFirstCallback
* @param {Error|null=} error
* @param {DescriptionFileInfo=} result
*/
/**
* @param {Resolver} resolver resolver
* @param {string} directory directory
* @param {string[]} filenames filenames
* @param {DescriptionFileInfo|undefined} oldInfo oldInfo
* @param {ResolveContext} resolveContext resolveContext
* @param {ErrorFirstCallback} callback callback
*/
function loadDescriptionFile(
resolver,
directory,
filenames,
oldInfo,
resolveContext,
callback
) {
(function findDescriptionFile() {
if (oldInfo && oldInfo.directory === directory) {
// We already have info for this directory and can reuse it
return callback(null, oldInfo);
}
forEachBail(
filenames,
(filename, callback) => {
const descriptionFilePath = resolver.join(directory, filename);
if (resolver.fileSystem.readJson) {
resolver.fileSystem.readJson(descriptionFilePath, (err, content) => {
if (err) {
if (typeof err.code !== "undefined") {
if (resolveContext.missingDependencies) {
resolveContext.missingDependencies.add(descriptionFilePath);
}
return callback();
}
if (resolveContext.fileDependencies) {
resolveContext.fileDependencies.add(descriptionFilePath);
}
return onJson(err);
}
if (resolveContext.fileDependencies) {
resolveContext.fileDependencies.add(descriptionFilePath);
}
onJson(null, content);
});
} else {
resolver.fileSystem.readFile(descriptionFilePath, (err, content) => {
if (err) {
if (resolveContext.missingDependencies) {
resolveContext.missingDependencies.add(descriptionFilePath);
}
return callback();
}
if (resolveContext.fileDependencies) {
resolveContext.fileDependencies.add(descriptionFilePath);
}
let json;
if (content) {
try {
json = JSON.parse(content.toString());
} catch (e) {
return onJson(e);
}
} else {
return onJson(new Error("No content in file"));
}
onJson(null, json);
});
}
function onJson(err, content) {
if (err) {
if (resolveContext.log)
resolveContext.log(
descriptionFilePath + " (directory description file): " + err
);
else
err.message =
descriptionFilePath + " (directory description file): " + err;
return callback(err);
}
callback(null, {
content,
directory,
path: descriptionFilePath
});
}
},
(err, result) => {
if (err) return callback(err);
if (result) {
return callback(null, result);
} else {
const dir = cdUp(directory);
if (!dir) {
return callback();
} else {
directory = dir;
return findDescriptionFile();
}
}
}
);
})();
}
/**
* @param {any} content content
* @param {string|string[]} field field
* @returns {object|string|number|boolean|undefined} field data
*/
function getField(content, field) {
if (!content) return undefined;
if (Array.isArray(field)) {
let current = content;
for (let j = 0; j < field.length; j++) {
if (current === null || typeof current !== "object") {
current = null;
break;
}
current = current[field[j]];
}
return current;
} else {
return content[field];
}
}
/**
* @param {string} directory directory
* @returns {string|null} parent directory or null
*/
function cdUp(directory) {
if (directory === "/") return null;
const i = directory.lastIndexOf("/"),
j = directory.lastIndexOf("\\");
const p = i < 0 ? j : j < 0 ? i : i < j ? j : i;
if (p < 0) return null;
return directory.substr(0, p || 1);
}
exports.loadDescriptionFile = loadDescriptionFile;
exports.getField = getField;
exports.cdUp = cdUp;