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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def build(self):
 """ Builds this object into the desired output information. """

        signed = bool(self.options() & Builder.Options.Signed)

        # remove previous build information
        buildpath = self.buildPath()
        if not buildpath:
            raise errors.InvalidBuildPath(buildpath)

        # setup the environment
        for key, value in self.environment().items():
            log.info('SET {0}={1}'.format(key, value))
            os.environ[key] = value

        if os.path.exists(buildpath):
            shutil.rmtree(buildpath)

        # generate the build path for the installer
        os.makedirs(buildpath)

        # create the output path
        outpath = self.outputPath()
        if not os.path.exists(outpath):
            os.makedirs(outpath)

        # copy license information
        src = self.licenseFile()
        if src and os.path.exists(src):
            targ = os.path.join(buildpath, 'license.txt')
            shutil.copyfile(src, targ)

        # generate revision information
        if self.options() & Builder.Options.GenerateRevision:
            self.generateRevision()

        # generate documentation information
        if self.options() & Builder.Options.GenerateDocs:
            self.generateDocumentation(buildpath)

        # generate setup file
        if self.options() & Builder.Options.GenerateSetupFile:
            setuppath = os.path.join(self.sourcePath(), '..')
            egg = (self.options() & Builder.Options.GenerateEgg) != 0
            self.generateSetupFile(setuppath, egg=egg)

        # generate executable information
        if self.options() & Builder.Options.GenerateExecutable:
            if not self.generateExecutable(signed=signed):
                return

        # generate zipfile information
        if self.options() & Builder.Options.GenerateZipFile:
            self.generateZipFile(self.outputPath())

        # generate installer information
        if self.options() & Builder.Options.GenerateInstaller:
            self.generateInstaller(buildpath, signed=signed)