deinstall (Was: Re: [Distutils] setup.py clean questions )

[Thomas Heller]

> I would name the command 'uninstall' though, since this is the
> common term for these kinds of operations.
> 
> One other area where try-except might be useful is around
> os.remove(): the user should be informed about the failure to
> complete the command in a different way than by a traceback...
> e.g. if the file is locked. If it cannot be found, I think the
> correct procedure should be to continue the command ignoring
> the error.
Sure.

New version:

class uninstall(Command):
    description = "Remove all installed files"

    user_options = []

    def initialize_options(self):
        pass

    def finalize_options(self):
        pass
        
    def run(self):
        self.run_command('build')
        build = self.get_finalized_command('build')
        install = self.get_finalized_command('install')
        self.announce("removing files")
        for n in 'platlib', 'purelib', 'headers', 'scripts', 'data':
            dstdir = getattr(install, 'install_' + n)
            try:
                srcdir = getattr(build, 'build_' + n)
            except AttributeError:
                pass
            else:
                self._removefiles(dstdir, srcdir)

    def _removefiles(self, dstdir, srcdir):
        if not os.path.isdir(srcdir):
            return
        for n in os.listdir(srcdir):
            name = os.path.join(dstdir, n)
            if os.path.isfile(name):
                self.announce("removing '%s'" % name)
                if not self.dry_run:
                    try:
                        os.remove(name)
                    except OSError, details:
                        self.warn("Could not remove file: %s" % details)
                    if os.path.splitext(name)[1] == '.py':
                        # Try to remove .pyc and -pyo files also
                        try:
                            os.remove(name + 'c')
                        except OSError:
                            pass
                        try:
                            os.remove(name + 'o')
                        except OSError:
                            pass
            elif os.path.isdir(name):
                self._removefiles(name, os.path.join(srcdir, n))
                if not self.dry_run:
                    try:
                        os.rmdir(name)
                    except OSError, details:
                        self.warn("Are there additional user files?\n"\
                              "  Could not remove directory: %s" % details)
            else:
                self.announce("skipping removal of '%s' (does not exist)" %\
                              name)