Tarek Ziadé wrote: > Hello, > > This is a side discussion but quiet important ihmo. > > == Problem == > > Some people complained about the fact that is was hard to extend > Distutils commands. > You end up rewriting the whole command most of the time. > > So what's a command ? It's a class that is used by the distribution > instance when you run Distutils. > > roughly: > > cmd = Command(distribution) > cmd.initialize_options() > cmd.finalize_options() <--- allows to check the options if > subcommands where run > cmd.run() <--- runs the code > > each command can define sub commands, but most of the time it's a > harcoded list, so you need to inherit the command > if you want to add a new behavior. > > == work in progress, == > > What we want to do here is being able to define subsets in run(), > sharing the same options environment. > > so basically, a rough, generic run() method could be: > > def run(): > for func in some_funcs: > func(self, options) > > If "some_funcs" could be defined by a registery with simple names, > anyone could provide new functions > and configure the registery to run a sequence of function. > > Given a command name, Distutils can get this list of function, through > a registery. > Each function could register itself into Distutils, like in what I > have started to work here for the manifest file: > see http://wiki.python.org/moin/Distutils/ManifestPluginSystem > > The ordering would be configurable through the setup.cfg file. > > Any opinion, idea for this part ? > Have you looked at paver? It's syntax makes extension easy.
@task
def run():
function1()
function2()
function3()
or
@task
@needs([function1, function2, function3])
def run():
pass
So if I want to do everything that setuptools.command.install does and
also install locale files using my own function I do:
@task
def install_locales():
# My code to install locales goes here
pass
@task
def install():
# A new install task that overrides the system install task
# Note that I control ordering just by changing the order
# subtasks get called
call_task('setuptools.command.install')
call_task('install_locales')
-Toshio
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