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/*
MIT License http://www.opensource.org/licenses/mit-license.php
*/
"use strict";
const path = require("path");
const WINDOWS_ABS_PATH_REGEXP = /^[a-zA-Z]:[\\/]/;
const SEGMENTS_SPLIT_REGEXP = /([|!])/;
const WINDOWS_PATH_SEPARATOR_REGEXP = /\\/g;
/**
* @typedef {Object} MakeRelativePathsCache
* @property {Map<string, Map<string, string>>=} relativePaths
*/
const relativePathToRequest = relativePath => {
if (relativePath === "") return "./.";
if (relativePath === "..") return "../.";
if (relativePath.startsWith("../")) return relativePath;
return `./${relativePath}`;
};
/**
* @param {string} context context for relative path
* @param {string} maybeAbsolutePath path to make relative
* @returns {string} relative path in request style
*/
const absoluteToRequest = (context, maybeAbsolutePath) => {
if (maybeAbsolutePath[0] === "/") {
if (
maybeAbsolutePath.length > 1 &&
maybeAbsolutePath[maybeAbsolutePath.length - 1] === "/"
) {
// this 'path' is actually a regexp generated by dynamic requires.
// Don't treat it as an absolute path.
return maybeAbsolutePath;
}
const querySplitPos = maybeAbsolutePath.indexOf("?");
let resource =
querySplitPos === -1
? maybeAbsolutePath
: maybeAbsolutePath.slice(0, querySplitPos);
resource = relativePathToRequest(path.posix.relative(context, resource));
return querySplitPos === -1
? resource
: resource + maybeAbsolutePath.slice(querySplitPos);
}
if (WINDOWS_ABS_PATH_REGEXP.test(maybeAbsolutePath)) {
const querySplitPos = maybeAbsolutePath.indexOf("?");
let resource =
querySplitPos === -1
? maybeAbsolutePath
: maybeAbsolutePath.slice(0, querySplitPos);
resource = path.win32.relative(context, resource);
if (!WINDOWS_ABS_PATH_REGEXP.test(resource)) {
resource = relativePathToRequest(
resource.replace(WINDOWS_PATH_SEPARATOR_REGEXP, "/")
);
}
return querySplitPos === -1
? resource
: resource + maybeAbsolutePath.slice(querySplitPos);
}
// not an absolute path
return maybeAbsolutePath;
};
/**
* @param {string} context context for relative path
* @param {string} relativePath path
* @returns {string} absolute path
*/
const requestToAbsolute = (context, relativePath) => {
if (relativePath.startsWith("./") || relativePath.startsWith("../"))
return path.join(context, relativePath);
return relativePath;
};
const makeCacheable = fn => {
/** @type {WeakMap<object, Map<string, Map<string, string>>>} */
const cache = new WeakMap();
/**
* @param {string} context context used to create relative path
* @param {string} identifier identifier used to create relative path
* @param {Object=} associatedObjectForCache an object to which the cache will be attached
* @returns {string} the returned relative path
*/
const cachedFn = (context, identifier, associatedObjectForCache) => {
if (!associatedObjectForCache) return fn(context, identifier);
let innerCache = cache.get(associatedObjectForCache);
if (innerCache === undefined) {
innerCache = new Map();
cache.set(associatedObjectForCache, innerCache);
}
let cachedResult;
let innerSubCache = innerCache.get(context);
if (innerSubCache === undefined) {
innerCache.set(context, (innerSubCache = new Map()));
} else {
cachedResult = innerSubCache.get(identifier);
}
if (cachedResult !== undefined) {
return cachedResult;
} else {
const result = fn(context, identifier);
innerSubCache.set(identifier, result);
return result;
}
};
/**
* @param {Object=} associatedObjectForCache an object to which the cache will be attached
* @returns {function(string, string): string} cached function
*/
cachedFn.bindCache = associatedObjectForCache => {
let innerCache;
if (associatedObjectForCache) {
innerCache = cache.get(associatedObjectForCache);
if (innerCache === undefined) {
innerCache = new Map();
cache.set(associatedObjectForCache, innerCache);
}
} else {
innerCache = new Map();
}
/**
* @param {string} context context used to create relative path
* @param {string} identifier identifier used to create relative path
* @returns {string} the returned relative path
*/
const boundFn = (context, identifier) => {
let cachedResult;
let innerSubCache = innerCache.get(context);
if (innerSubCache === undefined) {
innerCache.set(context, (innerSubCache = new Map()));
} else {
cachedResult = innerSubCache.get(identifier);
}
if (cachedResult !== undefined) {
return cachedResult;
} else {
const result = fn(context, identifier);
innerSubCache.set(identifier, result);
return result;
}
};
return boundFn;
};
/**
* @param {string} context context used to create relative path
* @param {Object=} associatedObjectForCache an object to which the cache will be attached
* @returns {function(string): string} cached function
*/
cachedFn.bindContextCache = (context, associatedObjectForCache) => {
let innerSubCache;
if (associatedObjectForCache) {
let innerCache = cache.get(associatedObjectForCache);
if (innerCache === undefined) {
innerCache = new Map();
cache.set(associatedObjectForCache, innerCache);
}
innerSubCache = innerCache.get(context);
if (innerSubCache === undefined) {
innerCache.set(context, (innerSubCache = new Map()));
}
} else {
innerSubCache = new Map();
}
/**
* @param {string} identifier identifier used to create relative path
* @returns {string} the returned relative path
*/
const boundFn = identifier => {
const cachedResult = innerSubCache.get(identifier);
if (cachedResult !== undefined) {
return cachedResult;
} else {
const result = fn(context, identifier);
innerSubCache.set(identifier, result);
return result;
}
};
return boundFn;
};
return cachedFn;
};
/**
*
* @param {string} context context for relative path
* @param {string} identifier identifier for path
* @returns {string} a converted relative path
*/
const _makePathsRelative = (context, identifier) => {
return identifier
.split(SEGMENTS_SPLIT_REGEXP)
.map(str => absoluteToRequest(context, str))
.join("");
};
exports.makePathsRelative = makeCacheable(_makePathsRelative);
/**
*
* @param {string} context context for relative path
* @param {string} identifier identifier for path
* @returns {string} a converted relative path
*/
const _makePathsAbsolute = (context, identifier) => {
return identifier
.split(SEGMENTS_SPLIT_REGEXP)
.map(str => requestToAbsolute(context, str))
.join("");
};
exports.makePathsAbsolute = makeCacheable(_makePathsAbsolute);
/**
* @param {string} context absolute context path
* @param {string} request any request string may containing absolute paths, query string, etc.
* @returns {string} a new request string avoiding absolute paths when possible
*/
const _contextify = (context, request) => {
return request
.split("!")
.map(r => absoluteToRequest(context, r))
.join("!");
};
const contextify = makeCacheable(_contextify);
exports.contextify = contextify;
/**
* @param {string} context absolute context path
* @param {string} request any request string
* @returns {string} a new request string using absolute paths when possible
*/
const _absolutify = (context, request) => {
return request
.split("!")
.map(r => requestToAbsolute(context, r))
.join("!");
};
const absolutify = makeCacheable(_absolutify);
exports.absolutify = absolutify;
const PATH_QUERY_FRAGMENT_REGEXP =
/^((?:\0.|[^?#\0])*)(\?(?:\0.|[^#\0])*)?(#.*)?$/;
/** @typedef {{ resource: string, path: string, query: string, fragment: string }} ParsedResource */
/**
* @param {string} str the path with query and fragment
* @returns {ParsedResource} parsed parts
*/
const _parseResource = str => {
const match = PATH_QUERY_FRAGMENT_REGEXP.exec(str);
return {
resource: str,
path: match[1].replace(/\0(.)/g, "$1"),
query: match[2] ? match[2].replace(/\0(.)/g, "$1") : "",
fragment: match[3] || ""
};
};
exports.parseResource = (realFn => {
/** @type {WeakMap<object, Map<string, ParsedResource>>} */
const cache = new WeakMap();
const getCache = associatedObjectForCache => {
const entry = cache.get(associatedObjectForCache);
if (entry !== undefined) return entry;
/** @type {Map<string, ParsedResource>} */
const map = new Map();
cache.set(associatedObjectForCache, map);
return map;
};
/**
* @param {string} str the path with query and fragment
* @param {Object=} associatedObjectForCache an object to which the cache will be attached
* @returns {ParsedResource} parsed parts
*/
const fn = (str, associatedObjectForCache) => {
if (!associatedObjectForCache) return realFn(str);
const cache = getCache(associatedObjectForCache);
const entry = cache.get(str);
if (entry !== undefined) return entry;
const result = realFn(str);
cache.set(str, result);
return result;
};
fn.bindCache = associatedObjectForCache => {
const cache = getCache(associatedObjectForCache);
return str => {
const entry = cache.get(str);
if (entry !== undefined) return entry;
const result = realFn(str);
cache.set(str, result);
return result;
};
};
return fn;
})(_parseResource);
/**
* @param {string} filename the filename which should be undone
* @param {string} outputPath the output path that is restored (only relevant when filename contains "..")
* @param {boolean} enforceRelative true returns ./ for empty paths
* @returns {string} repeated ../ to leave the directory of the provided filename to be back on output dir
*/
exports.getUndoPath = (filename, outputPath, enforceRelative) => {
let depth = -1;
let append = "";
outputPath = outputPath.replace(/[\\/]$/, "");
for (const part of filename.split(/[/\\]+/)) {
if (part === "..") {
if (depth > -1) {
depth--;
} else {
const i = outputPath.lastIndexOf("/");
const j = outputPath.lastIndexOf("\\");
const pos = i < 0 ? j : j < 0 ? i : Math.max(i, j);
if (pos < 0) return outputPath + "/";
append = outputPath.slice(pos + 1) + "/" + append;
outputPath = outputPath.slice(0, pos);
}
} else if (part !== ".") {
depth++;
}
}
return depth > 0
? `${"../".repeat(depth)}${append}`
: enforceRelative
? `./${append}`
: append;
};