Why does /etc/setup/installed.db list tar.bz2 even if tar.xz

Why does /etc/setup/installed.db list tar.bz2 even if tar.xz

[cygwin]

The installed.db seems to always list packages as being tar.bz2 even
when they are tar.xz.

Is there any reason for this? Or is it a bug?

Thanks,
Jeff

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Re: Why does /etc/setup/installed.db list tar.bz2 even if tar.xz

[Steven Penny]

On Sat, 12 Oct 2013 23:48:00, <cygwin at kosowsky dot org> wrote:
> The installed.db seems to always list packages as being tar.bz2 even
> when they are tar.xz.
> 
> Is there any reason for this? Or is it a bug?

http://cygwin.com/ml/cygwin/2013-10/msg00170.html

This is an old thread, but it appears this issue was never answered and
persists. For example, /etc/setup/installed.db has entries like this:

    gawk gawk-4.2.0-1.tar.bz2 0
    which which-2.20-2.tar.bz2 0

but not all the files are actually bz2:

- http://cygwin.mirror.constant.com/x86_64/release/gawk
- http://cygwin.mirror.constant.com/x86_64/release/which


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Re: Why does /etc/setup/installed.db list tar.bz2 even if tar.xz

[Marco Atzeri]

On 04/02/2018 03:19, Steven Penny wrote:
> On Sat, 12 Oct 2013 23:48:00, <cygwin at kosowsky dot org> wrote:
>> The installed.db seems to always list packages as being tar.bz2 even
>> when they are tar.xz.
>>
>> Is there any reason for this? Or is it a bug?
> 
> http://cygwin.com/ml/cygwin/2013-10/msg00170.html
> 
> This is an old thread, but it appears this issue was never answered and
> persists. For example, /etc/setup/installed.db has entries like this:
> 

it is an historical shortcut in the setup code.
".tar.bz2" is just added to package name and version,
it is not really derived from the package file


$ grep -H  "tar.bz2" package_db.cc
package_db.cc:      pkgm.name + "-" + 
std::string(pkgm.installed.Canonical_version()) + ".tar.bz2 " +


When we moved from bz2 to xz, that shortcut was not changed.

Regards
Marco





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Re: Why does /etc/setup/installed.db list tar.bz2 even if tar.xz

[Jon Turney]

On 04/02/2018 11:09, Marco Atzeri wrote:
> On 04/02/2018 03:19, Steven Penny wrote:
>> On Sat, 12 Oct 2013 23:48:00, <cygwin at kosowsky dot org> wrote:
>>> The installed.db seems to always list packages as being tar.bz2 even
>>> when they are tar.xz.
>>>
>>> Is there any reason for this? Or is it a bug?
>>
>> http://cygwin.com/ml/cygwin/2013-10/msg00170.html
>>
>> This is an old thread, but it appears this issue was never answered and
>> persists. For example, /etc/setup/installed.db has entries like this:
>>
> 
> it is an historical shortcut in the setup code.
> ".tar.bz2" is just added to package name and version,
> it is not really derived from the package file
> 
> 
> $ grep -H  "tar.bz2" package_db.cc
> package_db.cc:      pkgm.name + "-" + 
> std::string(pkgm.installed.Canonical_version()) + ".tar.bz2 " +
> 
> 
> When we moved from bz2 to xz, that shortcut was not changed.

More, it was kept like that for backwards compatibility.

Specifically, cygcheck is a consumer of this file, and until [1], didn't 
know of the existence of other compression types.

The comment [2] above the source line mentioned describes the format of 
installed.db.

[1] 
https://cygwin.com/git/gitweb.cgi?p=newlib-cygwin.git;a=commitdiff;h=9a2f0cff8fc6706d16356552b86c1e0c8ba35ddf

[2] 
https://sourceware.org/git/gitweb.cgi?p=cygwin-setup.git;a=blob;f=package_db.cc;h=730cb78c3d3ce33907cdd9d3a0de3857694fdc37;hb=HEAD#l292

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