Re: Data updates in debian packages
On Fri, Oct 28, 2016 at 6:38 PM, Ole Streicher wrote:
> We have the problem (I am not sure whether I posted about this already),
> that the "casacore" package needs additional "casacore-data-XXX"
> packages, providing the basic data to work with casacore. Some of the
> data are almost immutable, others (for example leap seconds) are
> changing every year or so, and others change quite rapidly (high
> precision ephemides forecasts). They all can be downloaded from some FTP
> servers.
FYI leap seconds are already packaged multiple times in Debian, so
please do not add another copy of them.
tzdata: /usr/share/zoneinfo/leap-seconds.list
swe-basic-data: /usr/share/libswe/ephe/seleapsec.txt
ptpd: /usr/share/ptpd/leap-seconds.list.28dec2015
pike7.8-core: /usr/lib/pike7.8/modules/Calendar.pmod/tzdata/leapseconds
pike8.0-core: /usr/lib/pike8.0/modules/Calendar.pmod/tzdata/leap-seconds.list
pike8.0-core: /usr/lib/pike8.0/modules/Calendar.pmod/tzdata/leapseconds
libjs-jquery-flot-docs:
/usr/share/doc/libjs-jquery-flot-docs/examples/axes-time-zones/tz/leapseconds
mariadb-test-data:
/usr/share/mysql/mysql-test/std_data/mysql5613mysql/time_zone_leap_second.MYD
mariadb-test-data:
/usr/share/mysql/mysql-test/std_data/mysql5613mysql/time_zone_leap_second.MYI
mariadb-test-data:
/usr/share/mysql/mysql-test/std_data/mysql5613mysql/time_zone_leap_second.frm
> How should the update service work? Can it just overwrite the existing
> files? How one should handle if an update (with possibly older data) in
> installed to not downgrade the data?
Check out pciutils/usbutils and similar.
Essentially:
Make the applications look in /var by default.
Put the packaged data in /usr/share.
Have the postinst symlink from /var to /usr/share when the /var
location is missing or older than the /usr/share location.
Have an update script that can be run by the sysadmin or from cron
that downloads the latest version and atomically replaces the data in
the /var location.
Make sure that any security/privacy consequences of the non-apt update
method are dealt with.
--
bye,
pabs
https://wiki.debian.org/PaulWise
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