[Pythonmac-SIG] Package Manager idea, adding a URL scheme
oussoren at cistron.nl
Wed Oct 1 16:04:12 EDT 2003
On 1 okt 2003, at 21:39, Bob Ippolito wrote:
> On Wednesday, Oct 1, 2003, at 15:33 America/New_York, Ronald Oussoren
>> On 1 okt 2003, at 21:23, Bob Ippolito wrote:
>>>> That won't work whenever we get around releasing pyobjc-1.0, as
>>>> "1.0" < "1.0b1" :-(.
>>> We need to standardize on a way to do this, obviously.. The string
>>> comparison thing is bad, and the scapegoat has to figure out how to
>>> find the version for each package (which isn't always possible,
>>> because not every package includes this metadata).
>>> There should be a standard sys.version_info way of getting package
>> Not necessarily. It would be nice if every package used the same
>> layout of the version string (maybe the scheme used by python
>> itself), but the Linux package manager seem to have an pretty
>> accurate heuristic for comparing versions. Borrowing that heuristic
>> would also work.
> Can you find a reference for this? I'm not even sure which Linux
> package manager you're referring to.
I don't have a reference at hand, but I'm pretty sure RPM generally
"does the right thing" with version numbers. I haven't built linux
packages for years though, after I switched to Debian on my Linux
machine I haven't felt the need to built packages.
>> BTW. I just noted that PackMan (the GUI) doesn't have an 'uninstall'
>> option. That makes it harder to throw away packages that are not
>> really needed.
> You would either need to keep receipts, or the scapegoat would have to
> maintain an "uninstall program" for each package. Receipts is
> probably the way to go here, and that would at least partially solve
> the version-number-string problem (because the scapegoat wouldn't
> necessarily have to maintain a version checker for each package, but
> that would be incompatible with packages that the user installed
> themselves unless distutils was modified to support receipts).
I don't see how receipts would help with the version-number problem,
other than making it easier to find a version number. Distutils also
creates a PKG-INFO file in the source-distribution, that's an easy
source for information about packages (to bad this isn't installed when
you install a package).
I don't think that adding receipts to PackMan would be usefull, unless
the end-goal is pushing that code into distutils/the python core.
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