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var setterSrc = require("../__set__.js").toString(),
getterSrc = require("../__get__.js").toString(),
fs = require("fs"),
path = require("path"),
getImportGlobalsSrc = require("../getImportGlobalsSrc.js"),
getRewireRequires = require("./getRewireRequires.js"),
detectStrictMode = require("../detectStrictMode.js"),
browserInit = fs.readFileSync(__dirname + "/browserInit.js", "utf8"),
importGlobalsSrc = getImportGlobalsSrc(),
injectionSrc = getInjectionSrc().replace(/\s+/g, " "); // strip out unnecessary spaces to be unobtrusive in the debug view
/**
* Returns a string that gets injected at the beginning of every module. Its purpose is to
*
* - register the setters and getters according to the module's filename
* - override the internal require with a require proxy.
*
* @return {String}
*/
function getInjectionSrc() {
// Registers the setters and getters of every module according to their filename. The setters and getters must be
// injected as string here to gain access to the private scope of the module.
return 'require("rewire").register(__filename, ' + setterSrc + ', ' + getterSrc + ');' +
// Overrides the module internal require with a require proxy. This proxy is necessary to call rewire with the
// module's filename at the first parameter to resolve the path. This way rewire() works exactly like require().
'require = window.browserifyRequire.getProxy(require, __filename);';
}
function browserifyMiddleware(b) {
function injectRewire(src, filename) {
var rewireRequires,
strictMode = "";
// Search for all rewire() statements an return the required path.
rewireRequires = getRewireRequires(src);
// Add all modules that are loaded by rewire() manually to browserify because browserify's
// require-sniffing doesn't work here.
rewireRequires.forEach(function forEachRewireRequire(requirePath) {
// Resolve absolute paths
if (requirePath.charAt(0) === ".") {
requirePath = path.resolve(path.dirname(filename), requirePath);
}
b.require(requirePath);
});
// If the module uses strict mode we must ensure that "use strict" stays at the beginning of the module.
if (detectStrictMode(src) === true) {
strictMode = ' "use strict"; ';
}
// Convert back slashes to normal slashes.
filename = filename.replace(/\\/g, "/");
// We don't want to inject this code at the beginning of a rewire/lib-module. Otherwise
// it would cause a black hole that devours our universe.
if (filename.indexOf("/rewire/lib") === -1) {
src =
strictMode + // either '' or ' "use strict"; '
"/* this line was injected by rewire() */" +
"var global = window; " + // window is our new global object
importGlobalsSrc +
injectionSrc + "\n" +
src;
}
return src;
}
// Register file handler
b.register(".js", injectRewire);
// Append rewire initialization at the end of the bundle
b.append(browserInit);
return b;
}
module.exports = browserifyMiddleware;
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