[Python-apps-team] Bug#646546: mercurial fails to run: abort: couldn't find mercurial libraries in [/usr/bin /usr/lib/python2.6 [...]

[Thilo-Alexander Ginkel]

On Wed, Oct 26, 2011 at 10:01, Javi Merino <cibervicho at gmail.com> wrote:
> On 25/10/11 00:40, Thilo-Alexander Ginkel wrote:
>> Package: mercurial
>> Version: 1.6.4-1
>> Severity: normal
>> Tags: squeeze
>>
>> Mercurial as installed on a fresh Debian 6.0 installation fails to execute with the following error message:
>>
>> tg at vega ~$ hg
>> abort: couldn't find mercurial libraries in [/usr/bin /usr/lib/python2.6 /usr/lib/python2.6/plat-linux2 /usr/lib/python2.6/lib-tk /usr/lib/python2.6/lib-old /usr/lib/python2.6/lib-dynload /usr/local/lib/python2.6/dist-packages /usr/lib/python2.6/dist-packages /usr/lib/pymodules/python2.6]
>> (check your install and PYTHONPATH)
>
> Can you please run "ls /usr/lib/pymodules/python2.6/" and "debsums -c
> mercurial mercurial-common" (you may need to install the debsums package)?

-- 8< --
tg at vega ~$ ls /usr/lib/pymodules/python2.6/
beaker                 boto-1.9b.egg-info      hgext
mercurial                 pygments                 reportbug
Beaker-1.5.4.egg-info  chardet                 lsb_release.py
mercurial-1.6.4.egg-info  Pygments-1.3.1.egg-info
reportbug-4.12.6.egg-info
boto                   chardet-2.0.1.egg-info  lsb_release.pyc
OpenSSL                   pyOpenSSL-0.10.egg-info
-- 8< --

-- 8< --
tg at vega ~$ debsums -c mercurial mercurial-common
-- 8< --
<no output>

> Can you try to reinstall the package with "aptitude install --reinstall
> mercurial mercurial-common"? It should say "Processing triggers for
> python-support ..." as part of the output.

My aptitude does not support --reinstall, but apt-get does:

-- 8< --
tg at vega ~$ sudo apt-get install --reinstall mercurial mercurial-common
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 2 reinstalled, 0 to remove and 0 not upgraded.
Need to get 0 B/1,414 kB of archives.
After this operation, 0 B of additional disk space will be used.
(Reading database ... 80369 files and directories currently installed.)
Preparing to replace mercurial-common 1.6.4-1 (using
.../mercurial-common_1.6.4-1_all.deb) ...
Unpacking replacement mercurial-common ...
Preparing to replace mercurial 1.6.4-1 (using
.../mercurial_1.6.4-1_amd64.deb) ...
Unpacking replacement mercurial ...
Setting up mercurial-common (1.6.4-1) ...
Setting up mercurial (1.6.4-1) ...
-- 8< --

No triggers.

> I've just installed mercurial in a fresh squeeze install and it works
> for me.

I also set up another virtual machine where it works correctly, but I
cannot easily perform a reinstall as the system in question is
provided as a VPS image, so I cannot really perform a scratch install.

Based on the output I got on my VM when installing mercurial I however
figured out that the triggers for python-support are not being
invoked.

debsums -c python-support showed no differences, but reinstalling
python-support before reinstalling mercurial and mercurial-common
actually solved the issue.

Thanks for your help!

Regards,
Thilo