lib/rewire.js
function internalRewire(parentModulePath, targetPath) {
    var targetModule,
        prelude,
        appendix,
        src;

    // Checking params
    if (typeof targetPath !== "string") {
        throw new TypeError("Filename must be a string");
    }

    // Resolve full filename relative to the parent module
    targetPath = Module._resolveFilename(targetPath, parentModulePath);

    // Create testModule as it would be created by require()
    targetModule = new Module(targetPath, parentModulePath);

    // We prepend a list of all globals declared with var so they can be overridden (without changing original globals)
    prelude = getImportGlobalsSrc();

    // Wrap module src inside IIFE so that function declarations do not clash with global variables
    // @see https://github.com/jhnns/rewire/issues/56
    prelude += "(function () { ";

    // We append our special setter and getter.
    appendix = "\n" + getDefinePropertySrc();

    // End of IIFE
    appendix += "})();";

    // Check if the module uses the strict mode.
    // If so we must ensure that "use strict"; stays at the beginning of the module.
    src = fs.readFileSync(targetPath, "utf8");
    if (detectStrictMode(src) === true) {
        prelude = ' "use strict"; ' + prelude;
    }

    moduleEnv.inject(prelude, appendix);
    moduleEnv.load(targetModule);

    return targetModule.exports;
}
function internalRewire(parentModulePath, targetPath) {
    var targetModule,
        prelude,
        appendix,
        src;

    // Checking params
    if (typeof targetPath !== "string") {
        throw new TypeError("Filename must be a string");
    }

    // Resolve full filename relative to the parent module
    targetPath = Module._resolveFilename(targetPath, parentModulePath);

    // Create testModule as it would be created by require()
    targetModule = new Module(targetPath, parentModulePath);

    // We prepend a list of all globals declared with var so they can be overridden (without changing original globals)
    prelude = getImportGlobalsSrc();

    // Wrap module src inside IIFE so that function declarations do not clash with global variables
    // @see https://github.com/jhnns/rewire/issues/56
    prelude += "(function () { ";

    // We append our special setter and getter.
    appendix = "\n" + getDefinePropertySrc();

    // End of IIFE
    appendix += "})();";

    // Check if the module uses the strict mode.
    // If so we must ensure that "use strict"; stays at the beginning of the module.
    src = fs.readFileSync(targetPath, "utf8");
    if (detectStrictMode(src) === true) {
        prelude = ' "use strict"; ' + prelude;
    }

    moduleEnv.inject(prelude, appendix);
    moduleEnv.load(targetModule);

    return targetModule.exports;
}
function internalRewire ( parentModulePath , targetPath ) { var targetModule , prelude , appendix , src ; // Checking params if ( typeof targetPath !== "string" ) { throw new TypeError ( "Filename must be a string" ) ; } // Resolve full filename relative to the parent module targetPath = Module . _resolveFilename ( targetPath , parentModulePath ) ; // Create testModule as it would be created by require() targetModule = new Module ( targetPath , parentModulePath ) ; // We prepend a list of all globals declared with var so they can be overridden (without changing original globals) prelude = getImportGlobalsSrc ( ) ; // Wrap module src inside IIFE so that function declarations do not clash with global variables // @see https://github.com/jhnns/rewire/issues/56 prelude += "(function () { " ; // We append our special setter and getter. appendix = "\n" + getDefinePropertySrc ( ) ; // End of IIFE appendix += "})();" ; // Check if the module uses the strict mode. // If so we must ensure that "use strict"; stays at the beginning of the module. src = fs . readFileSync ( targetPath , "utf8" ) ; if ( detectStrictMode ( src ) === true ) { prelude = ' "use strict"; ' + prelude ; } moduleEnv . inject ( prelude , appendix ) ; moduleEnv . load ( targetModule ) ; return targetModule . exports ; }
Does actual rewiring the module. For further documentation @see index.js
Does actual rewiring the module . For further documentation