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Problem

Windows binary installers often have dependencies on other binary libraries which one would like to include in the filename for the installer such as PyOpenGL-2.0.1-Numpy23.exe

Solution

Subclass bdist_wininst to introduce a customisation point for acquiring the filename.

import sys, os, string, struct
from distutils.command.bdist_wininst import bdist_wininst

class BdistWinInstaller(bdist_wininst):
    """Version of bdist_wininst with customization point for filename

    This class should operate identically to the built-in
    class, it exists solely to provide the customization point.
    """
    def get_installer_filename(self, directory, fullname, target_version= None):
        """Calculate the final installer filename"""
        if target_version:
            return os.path.join(
                directory,
                "%s.win32-py%s.exe" % (
                    fullname,
                    target_version
                )
            )
        else:
            return os.path.join(
                directory,
                "%s.win32.exe" % fullname
            )
    def create_exe (self, arcname, fullname, bitmap=None):
        """Do the actual creation of the executable file

        The base command, unfortunately, does not break down
        this command into sub-commands, so this method is
        almost entirely a duplication of the base-class method,
        with the only noticeable difference being the
        call to get_installer_filename(...) instead of
        calculating the filename inline.
        """
        import struct

        self.mkpath(self.dist_dir)

        cfgdata = self.get_inidata()
        installer_name = self.get_installer_filename(
            self.dist_dir,
            fullname,
            self.target_version,
        )
        self.announce("creating %s" % installer_name)

        if bitmap:
            bitmapdata = open(bitmap, "rb").read()
            bitmaplen = len(bitmapdata)
        else:
            bitmaplen = 0

        file = open(installer_name, "wb")
        file.write(self.get_exe_bytes())
        if bitmap:
            file.write(bitmapdata)

        file.write(cfgdata)
        header = struct.pack("<iii",
                             0x1234567A,       # tag
                             len(cfgdata),     # length
                             bitmaplen,        # number of bytes in bitmap
                             )
        file.write(header)
        file.write(open(arcname, "rb").read())

Discussion

This might be better introduced as part of the core rather than as a seperate recipe, as the customisation point doesn't alter the base operation, just provides a hook for the customisation.


CategoryDistutilsCookbook

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