mirror of https://github.com/webpack/webpack.git
278 lines
7.7 KiB
JavaScript
278 lines
7.7 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Tobias Koppers @sokra
|
|
*/
|
|
var path = require("path");
|
|
var fs = require("fs");
|
|
|
|
// http://nodejs.org/docs/v0.4.8/api/all.html#all_Together...
|
|
|
|
|
|
function resolve(context, identifier, options, type, callback) {
|
|
function finalResult(err, absoluteFilename) {
|
|
if(err) {
|
|
callback("Module \"" + identifier + "\" not found in context \"" +
|
|
context + "\"\n " + err);
|
|
return;
|
|
}
|
|
callback(null, absoluteFilename);
|
|
}
|
|
var identArray = split(identifier);
|
|
var contextArray = split(context);
|
|
while(options.alias[identArray[0]]) {
|
|
var old = identArray[0];
|
|
identArray[0] = options.alias[identArray[0]];
|
|
identArray = split(path.join.apply(path, identArray));
|
|
if(identArray[0] === old)
|
|
break;
|
|
}
|
|
if(identArray[0] === "." || identArray[0] === ".." || identArray[0] === "" || identArray[0].match(/^[A-Z]:$/i)) {
|
|
var pathname = identArray[0][0] === "." ? join(contextArray, identArray) : path.join.apply(path, identArray);
|
|
loadAsFile(pathname, options, type, function(err, absoluteFilename) {
|
|
if(err) {
|
|
loadAsDirectory(pathname, options, type, finalResult);
|
|
return;
|
|
}
|
|
callback(null, absoluteFilename);
|
|
});
|
|
} else {
|
|
loadNodeModules(contextArray, identArray, options, type, finalResult);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* context: absolute filename of current file
|
|
* identifier: module to find
|
|
* options:
|
|
* paths: array of lookup paths
|
|
* callback: function(err, absoluteFilename)
|
|
*/
|
|
module.exports = function(context, identifier, options, callback) {
|
|
if(!callback) {
|
|
callback = options;
|
|
options = {};
|
|
}
|
|
if(!options)
|
|
options = {};
|
|
if(!options.extensions)
|
|
options.extensions = ["", ".webpack.js", ".web.js", ".js"];
|
|
if(!options.loaders)
|
|
options.loaders = [];
|
|
if(!options.postfixes)
|
|
options.postfixes = ["", "-webpack", "-web"];
|
|
if(!options.loaderExtensions)
|
|
options.loaderExtensions = [".webpack-web-loader.js", ".webpack-loader.js", ".web-loader.js", ".loader.js", "", ".js"];
|
|
if(!options.loaderPostfixes)
|
|
options.loaderPostfixes = ["-webpack-web-loader", "-webpack-loader", "-web-loader", "-loader", ""];
|
|
if(!options.paths)
|
|
options.paths = [];
|
|
if(!options.alias)
|
|
options.alias = {};
|
|
var identifiers = identifier.split(/!/g);
|
|
if(identifiers.length === 1) {
|
|
var resource = identifiers.pop();
|
|
for(var i = 0; i < options.loaders.length; i++) {
|
|
var line = options.loaders[i];
|
|
if(line.test.test(resource)) {
|
|
identifiers.push(line.loader);
|
|
break;
|
|
}
|
|
}
|
|
identifiers.push(resource);
|
|
}
|
|
var errors = [];
|
|
var count = identifiers.length;
|
|
function endOne() {
|
|
count--;
|
|
if(count === 0) {
|
|
if(errors.length > 0) {
|
|
callback(errors.join("\n"));
|
|
return;
|
|
}
|
|
callback(null, identifiers.join("!"));
|
|
}
|
|
}
|
|
identifiers.forEach(function(ident, index) {
|
|
resolve(context, ident, options, index === identifiers.length - 1 ? "normal" : "loader", function(err, filename) {
|
|
if(err) {
|
|
errors.push(err);
|
|
} else {
|
|
if(!filename) {
|
|
throw new Error(JSON.stringify({identifiers: identifiers, from: ident, to: filename}));
|
|
}
|
|
|
|
identifiers[index] = filename;
|
|
}
|
|
endOne()
|
|
});
|
|
});
|
|
}
|
|
|
|
module.exports.context = function(context, identifier, options, callback) {
|
|
if(!callback) {
|
|
callback = options;
|
|
options = {};
|
|
}
|
|
if(!options)
|
|
options = {};
|
|
if(!options.paths)
|
|
options.paths = [];
|
|
function finalResult(err, absoluteFilename) {
|
|
if(err) {
|
|
callback("Context \"" + identifier + "\" not found in context \"" + context + "\"");
|
|
return;
|
|
}
|
|
callback(null, absoluteFilename);
|
|
}
|
|
var identArray = identifier.split("/");
|
|
var contextArray = split(context);
|
|
if(identArray[0] === "." || identArray[0] === ".." || identArray[0] === "") {
|
|
var pathname = join(contextArray, identArray);
|
|
fs.stat(pathname, function(err, stat) {
|
|
if(err) {
|
|
finalResult(err);
|
|
return;
|
|
}
|
|
if(!stat.isDirectory()) {
|
|
finalResult("Context \"" + identifier + "\" in not a directory");
|
|
return;
|
|
}
|
|
callback(null, pathname);
|
|
});
|
|
} else {
|
|
loadNodeModulesAsContext(contextArray, identArray, options, finalResult);
|
|
}
|
|
}
|
|
|
|
function split(a) {
|
|
return a.split(/[\/\\]/g);
|
|
}
|
|
|
|
function join(a, b) {
|
|
var c = [];
|
|
a.forEach(function(x) { c.push(x) });
|
|
b.forEach(function(x) { c.push(x) });
|
|
if(c[0] === "")
|
|
c[0] = "/";
|
|
return path.join.apply(path, c);
|
|
}
|
|
|
|
function loadAsFile(filename, options, type, callback) {
|
|
var pos = -1, result = "NOT SET";
|
|
var extensions = type === "loader" ? options.loaderExtensions : options.extensions;
|
|
function tryCb(err, stats) {
|
|
if(err || !stats || !stats.isFile()) {
|
|
pos++;
|
|
if(pos >= extensions.length) {
|
|
callback(err || "Isn't a file");
|
|
return;
|
|
}
|
|
fs.stat(result = filename + extensions[pos], tryCb);
|
|
return;
|
|
}
|
|
if(!result) throw new Error("no result");
|
|
callback(null, result);
|
|
}
|
|
tryCb(true);
|
|
}
|
|
|
|
function loadAsDirectory(dirname, options, type, callback) {
|
|
var packageJsonFile = join(split(dirname), ["package.json"]);
|
|
fs.stat(packageJsonFile, function(err, stats) {
|
|
var mainModule = "index";
|
|
if(!err && stats.isFile()) {
|
|
fs.readFile(packageJsonFile, "utf-8", function(err, content) {
|
|
if(err) {
|
|
callback(err);
|
|
return;
|
|
}
|
|
content = JSON.parse(content);
|
|
if(content.webpackLoader && type === "loader")
|
|
mainModule = content.webpackLoader;
|
|
else if(content.webpack)
|
|
mainModule = content.webpack;
|
|
else if(content.browserify)
|
|
mainModule = content.browserify;
|
|
else if(content.main)
|
|
mainModule = content.main;
|
|
loadAsFile(join(split(dirname), [mainModule]), options, type, callback);
|
|
});
|
|
} else
|
|
loadAsFile(join(split(dirname), [mainModule]), options, type, callback);
|
|
});
|
|
}
|
|
|
|
function loadNodeModules(context, identifier, options, type, callback) {
|
|
var moduleName = identifier.shift();
|
|
var postfixes = type === "loader" ? options.loaderPostfixes : options.postfixes;
|
|
nodeModulesPaths(context, options, function(err, paths) {
|
|
var dirs = [];
|
|
paths.forEach(function(path) {
|
|
postfixes.forEach(function(postfix) {
|
|
dirs.push(join(split(path), [moduleName+postfix]));
|
|
});
|
|
});
|
|
function tryDir(dir) {
|
|
var pathname = join(split(dir), identifier);
|
|
loadAsFile(pathname, options, type, function(err, absoluteFilename) {
|
|
if(err) {
|
|
loadAsDirectory(pathname, options, type, function(err, absoluteFilename) {
|
|
if(err) {
|
|
if(dirs.length === 0) {
|
|
callback("no module in any path of paths");
|
|
return;
|
|
}
|
|
tryDir(dirs.shift());
|
|
return;
|
|
}
|
|
callback(null, absoluteFilename);
|
|
});
|
|
return;
|
|
}
|
|
callback(null, absoluteFilename);
|
|
});
|
|
}
|
|
tryDir(dirs.shift());
|
|
});
|
|
}
|
|
|
|
function loadNodeModulesAsContext(context, identifier, options, callback) {
|
|
nodeModulesPaths(context, options, function(err, dirs) {
|
|
function tryDir(dir) {
|
|
var pathname = join(split(dir), identifier);
|
|
fs.stat(pathname, function(err, stat) {
|
|
if(err || !stat.isDirectory()) {
|
|
if(dirs.length === 0) {
|
|
callback(true);
|
|
return;
|
|
}
|
|
tryDir(dirs.shift());
|
|
return;
|
|
}
|
|
callback(null, pathname);
|
|
});
|
|
}
|
|
tryDir(dirs.shift());
|
|
});
|
|
}
|
|
|
|
function nodeModulesPaths(context, options, callback) {
|
|
var parts = context;
|
|
var rootNodeModules = parts.indexOf("node_modules");
|
|
var rootWebModules = parts.indexOf("web_modules");
|
|
var root = 0;
|
|
if(rootWebModules != -1 && rootNodeModules != -1)
|
|
root = Math.min(rootWebModules, rootNodeModules)-1;
|
|
else if(rootWebModules != -1 || rootNodeModules != -1)
|
|
root = Math.max(rootWebModules, rootNodeModules)-1;
|
|
var dirs = [];
|
|
options.paths.forEach(function(path) { dirs.push(path) });
|
|
for(var i = parts.length; i > root; i--) {
|
|
if(parts[i-1] === "node_modules" || parts[i-1] === "web_modules")
|
|
continue;
|
|
var part = parts.slice(0, i);
|
|
dirs.push(join(part, ["web_modules"]));
|
|
dirs.push(join(part, ["node_modules"]));
|
|
}
|
|
callback(null, dirs);
|
|
} |