In <[🔎] 4B698BE6.10201@avelon-cetex.com>, M. Frey wrote:
>I'm using my own Debian .deb-packages for managing software updates on a
>small numbers of embedded computers. So this question is about creating
>my own .deb Packages. I hope you can help me, even if I'm not an
>official debian package maintainer.
>
>I got the Package A with the version 1.0 and 2.0. From version 2.0 on
>it's not necessary to keep track of the file fileB.txt. But I want to
>keep fileB.txt on the target system anyway.
>
>Package A Ver. 1.0:
> - fileA.txt
> - fileB.txt
>
>Package A Ver. 2.0:
> - fileA.txt
>
>If I install the new package A. DPKG will of course remove fileB.txt.
>
>How can I prevent dpkg to remove fileB.txt?
You can't. It is owned by the installed package version and that won't
change.
>Of course, I could manipulate the dpkg file list, somewhere in the dpkg
>cache (file system). But how can I achieve the same effect within a
>package -> without manual manipulation on the target system?
Yeah, that's a horrible idea.
You should use a preinst or prerm to backup fileB.txt (files created by the
{pre,post}{inst,rm} scripts are considered owned by the package) to a
different file name during the time when dpkg would remove it and put it back
after the new package is installed.
>Is there any key word in the control file? Or is there a special file,
>which lists "dependencies to delete"?
No; No.
>What happens if the same file is contained in two packages and one of
>them gets removed?
dpkg will notice the packages conflict and not allow them to be installed at
the same time. (Assuming no Replaces dependency.)
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