retitle 681243 dpkg: warn when different packages have same file as directory
and symlink
merge 406715 681243
thanks
On 2012-07-11 19:07 +0200, Sven Joachim wrote:
> On 2012-07-11 18:53 +0200, Bart Martens wrote:
>
>> Package: dpkg
>> Version: 1.16.7
>>
>> The file /usr/include/tcl is a directory or a symbolic link depending on the
>> order of installation of the packages tk-tile 0.8.2-2.2 and tcl-dev 8.5.0-2.
>
> See #612264 on that topic.
>
>> This can be reproduced quite easily with these commands:
>>
>> pbuilder --login
>> apt-get -y install file
>> apt-get -y install tk-tile
>> apt-get -y install tcl-dev
>> file /usr/include/tcl
>> apt-get -y --purge remove tk-tile
>> apt-get -y --purge remove tcl-dev
>> apt-get -y install tcl-dev
>> apt-get -y install tk-tile
>> file /usr/include/tcl
>> dpkg -c /var/cache/apt/archives/tk-tile_0.8.2-2.2_amd64.deb | grep
>> include/tcl
>> dpkg -c /var/cache/apt/archives/tcl-dev_8.5.0-2_all.deb | grep include/tcl
>>
>> In my opinion, regardless of the order in which these two packages are
>> installed, dpkg should fail to install the second package, with an error
>> message about /usr/include/tcl.
>
> Policy (ยง6.6) actually documents this behavior:
>
> A directory will never be replaced by a symbolic link to a
> directory or vice versa; instead, the existing state (symlink or
> not) will be left alone and `dpkg' will follow the symlink if
> there is one.
And changing it would break quite a few things. However, emitting a
warning in such situations might be reasonable, see #406715.
Cheers,
Sven
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