Piotr Ożarowski pi...@debian.org writes:
PS while converting [from use of ‘python-central’ to use of
‘python-support’], remember to add to preinst something like these 3
lines:
| if [ $1 = upgrade ] dpkg --compare-versions $2 lt 1.2.3-4; then
| pycentral pkgremove python-foo
| fi
As noted elsewhere, this is to overcome behaviour (discussed in
URL:http://bugs.debian.org/479852) that is the default for
‘dh_pycentral’: “create symlinks on postinst, don't clean up on
prerm”. Because it is the default, this likely plagues a significant
portion of ‘python-central’-based packages already installed out
there.
The approaches suggested in the ‘dh_pycentral(1)’ manpage are:
This can be disabled by setting the environment varibale
DH_PYCENTRAL to a string containing the string noprepare. If the
newer version of a package needs to remove the symlinked files on
upgrade, either the package needs to take care of the removal by
calling pycentrel pkgremove in the new preinst, or leaving a file
/var/lib/pycentral/package.pkgremove and using pycentral 0.6.7
or later for the old package version.
I, like Piotr, am now preparing to migrate my Python packages to use
‘python-support’ (once the new version that stops using ‘/var/lib/’
hits ‘testing’). What is my best approach for preparing to do this? As
I see it, the existing documentation suggests one of:
* Leave the package for now depending on ‘python-central’, set
‘DH_PYCENTRAL = noprepare’ in my existing packages's
‘debian/rules’, then build and upload a new release; or
* Migrate the package immediately to use ‘python-support’, put the
call to ‘pycentral pkgremove foopackage’ in ‘preinst’ as shown
above by Piotr, then build and upload a new release; or
* Migrate the package immediately to use ‘python-support’, create an
empty ‘${DESTDIR}/var/lib/pycentral/foopackage.pkgremove’, then
build and upload a new release; or
* Something else (please specify).
Which of the above is best in general? What reasons would I have for
not doing the same thing to every affected package? How long should I
leave these measures in place before removing all mention of
‘python-central’ from a new release?
--
\ “When I get new information, I change my position. What, sir, |
`\ do you do with new information?” —John Maynard Keynes |
_o__) |
Ben Finney
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