Le Mon, 18 Apr 2011 19:13:29 +0200, Bill Allombert <[email protected]> a écrit :
> Package: libtango7 > Version: 7.2.6+dfsg-1 > Severity: important > > Hello Debian Science Maintainers, > > There is a circular dependency between libtango7 and tango-common: > > libtango7 :Depends: tango-common > tango-common :Depends: libtango7 > > Circular dependencies involving shared libraries are known to cause problems > during upgrade between stable releases, so we should try to get rid of them. > > See threads > http://lists.debian.org/debian-devel/2005/06/msg02111.html > http://lists.debian.org/debian-devel/2005/11/msg01101.html > > Cheers, Hello Bill, I understand the problem and I will put here my proposition: the Tango control system [1] is a distributed system based on CORBA. the unit cell of the system is called a "Device". Thoses devices (executable) are linked with the libtango7 library. To work a device must contact a daemon running somewhere on the internet this daemon is called the Database (the tango-db package). Then a configure file /etc/tangorc must be configure and contain the host and the port where is running the Database. So If you want to execute a Device it must be register into the Database. That's why I created this tango-common package which take care of this config file creation. So to be usable a program linked with libtango7 must also have this configure file set-up. Now the init script of the Databse located in tango-db use an executable called tango_admin which IS linked with the libtango. I put it in tango-common and this caused the circular dependency. Now I propose to split tango-common (config + tango_admin) into 2 new packages tango-common (config) and libtango-tools (tango_admin) that way I will have libtango7 :Depends: tango-common libtango-tools :Depends: libtango7 Is it ok for you If yes, I would like your advice for the transition, as tango_admin will be changed from one package to the other, It can cause conflict during upgrade. So is it sufficient to add libtango-tools :Depends: libtango7 Replace: tango-common << (7.2.6+dfsg-1) Breaks: tango-common (<< 7.2.6+dfsg-1) libtango-common : Suggest: libtango-tools (>> 7.2.6+dfsg-1) thanks Frederic [1] http://tango-controls.org -- GPG public key 4096R/4696E015 2011-02-14 fingerprint = E92E 7E6E 9E9D A6B1 AA31 39DC 5632 906F 4696 E015 uid Picca Frédéric-Emmanuel <[email protected]>
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