source: Dev/trunk/src/client/util/buildscripts/changeVersion.js

// Changes the Dojo version in a file. Used during the release process.

var
        version = new String(arguments[0]),
        revision = new String(arguments[1]),
        filename = new String(arguments[2]),

        writeFile= function(filename, contents){
                var
                        outFile = new java.io.File(filename),
                        outWriter;
                outWriter = new java.io.OutputStreamWriter(new java.io.FileOutputStream(outFile), "UTF-8");
                var os = new java.io.BufferedWriter(outWriter);
                try{
                        os.write(contents);
                }finally{
                        os.close();
                }
        },


        changeVersion = function(/*String*/version, /*String*/fileContents){
                // summary:
                //              Changes the version number for dojo. Input should be the fileContents
                //              of a file that contains the version number.

                //Set version number.
                //First, break apart the version string.
                var verSegments = version.match(/^(\d*)\.?(\d*)\.?(\d*)\.?(.*)$/);
                var majorValue = verSegments[1] || 0;
                var minorValue = verSegments[2] || 0;
                var patchValue = verSegments[3] || 0;
                var flagValue  = verSegments[4] || "";

                // Do the final version replacement.
                if(/package/.test(filename)){
                        fileContents = fileContents.replace(
                                /['"](version|dojo|dijit)['"]\s*\:\s*['"][\w\.\-]+?["']/g,
                                '"$1":"' + version + '"'
                        );
                }else{
                        fileContents = fileContents.replace(
                                /major:\s*\d*,\s*minor:\s*\d*,\s*patch:\s*\d*,\s*flag:\s*".*?"\s*,/g,
                                "major: " + majorValue + ", minor: " + minorValue + ", patch: " + patchValue + ", flag: \"" + flagValue + "\","
                        );
                        fileContents = fileContents.replace(/\$Rev(: \d+ |)\$/, "$Rev: " + revision + " $");
                }

                return fileContents; //String
        };

print(version);
print(filename);
var fileContents = readFile(filename, "utf-8");
fileContents = changeVersion(version, fileContents);
writeFile(filename, fileContents);