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Bug#771496: overwrites user changes to configuration file /etc/dpkg-cross/cross-compile on upgrade (violates 10.7.3)

Control: tag -1 + confirmed

On Sat, 06 Dec 2014 15:28:39 +0000, Dimitri John Ledkov wrote:

> The user's configuration in this case comes from debconf prompt and
> that choice is preserved upon upgrades, without additional prompts and
> is safe w.r.t. to dpkg prompts.

Yes but it does it wrong.
The .config should read existing values from the file and feed them
into debconf.

C.f. man 7 debconf-devel, section "Config file handling".
> /etc/dpkg-cross/cross-compile.sample on the other-hand is a conffile
> and direct modifications to that file will be preserved and used to
> generate /etc/dpkg-cross/cross-compile file.
> Thus you can edit the .sample file to add other things in that file
> and they will be preserved across upgrades.

This is non-intuitive (why would I edit .sample to change the other
one?) and more importantly it doesn't work because the postinst just
replaces "#*default_arch".

Again, debconf-devel(7) has a nice template for the postinst action.


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