Hello Marius

Thanks for the reply. This installation is using supervisor with uwsgi to run Galaxy using a virtualenv, and I did wonder why my install wasn't picking up Mercurial from there.

Based on your suggestion it turned out that I needed to add an 'environment' parameter like e.g.:
environment     = VIRTUAL_ENV="/srv/galaxy/venv",PATH="/srv/galaxy/venv/bin:%(ENV_PATH)s"
to the supervisor .ini file in order to get the virtualenv on the PATH.

(I thought I'd tried this before without success but it works now, so I must have done something wrong previously - possibly a type in a path.)

(Also, a comment re the documentation: in the "Scaling and Load Balancing" section of the docs, the 'environment' parameter is only mentioned for handler processes and doesn't appear in the example config for web processes:

https://docs.galaxyproject.org/en/master/admin/scaling.html#supervisord

and since I don't have any handlers (I'm using the uwsgi + mules strategy) it didn't occur to me that I would need it. It might be useful if the docs clarified that 'environment' is also required for the web processes in this case.)

Thanks again for your help,

Best wishes

Peter

-- 
Peter Briggs peter.briggs@manchester.ac.uk
Bioinformatics Core Facility University of Manchester
B.1083 Michael Smith Bldg Tel: (0161) 2751482

From: Marius van den Beek [m.vandenbeek@gmail.com]
Sent: Monday, June 25, 2018 5:30 PM
To: Peter Briggs
Cc: galaxy-dev@lists.galaxyproject.org
Subject: Re: [galaxy-dev] Unable to install tools from toolshed/mercurial issue in release_18.05 instance

Hi Peter,

Recent galaxy releases are using the `hg` command that should be automatically installed along with other galaxy dependencies.
If you're running galaxy in a virtualenv then that virtualenv should have the `hg` script in the bin folder.
Depending on how you start galaxy you may need to add the virtualenv's `bin` folder to the `PATH`.

Hope that helps,
Marius

On 25 June 2018 at 07:51, Peter Briggs <peter.briggs@manchester.ac.uk> wrote:
Dear devs

I've encountered what appears to be a subtle bug with release 18.05, which breaks the installation of tools from the toolshed, and appears to be a result of not having mercurial (hg) available in /usr/bin on the system that Galaxy is installed on (in this case Scientific Linux 6.5).

When attempting to install a tool (e.g. devteam/fastqc) from the main toolshed via the admin interface, after clicking "install" the tool installation status goes immediately to "Error". The tool repository isn't cloned to "shed_tools" and no dependencies are installed.

I've been unable to find any error messages in the logs. However, attempting to install via the API does return the message:

Error cloning repository: [Errno 2] No such file or directory

which comes from the "clone_repository" function in  lib/tool_shed/util/hg_util.py (when something goes wrong with the "hg clone ..." command).

Installing Mercurial 1.3 via yum on the server and attempting tool installation again gives a slightly different error via the API:

Error cloning repository: Command '['hg', 'clone', '-r', u'17', u'https://toolshed.g2.bx.psu.edu/repos/devteam/fastqc', u'/XXXXXXXXXXXXXX/shed_tools/toolshed.g2.bx.psu.edu/repos/devteam/fastqc/c15237684a01/fastqc']' returned non-zero exit status 255
Output was:
abort: No such file or directory: /XXXXXXXXXXXXXXXXXX/shed_tools/toolshed.g2.bx.psu.edu/repos/devteam/fastqc/c15237684a01/fastqc

Uninstalling the system Mercurial and instead installing version 3.7.3 and making a link from /usr/bin/hg seems to fix the problem, and tools can be installed without problems.

I couldn't find any evidence of this being reported before, and I don't know if I've missed some configuration detail which means that Galaxy isn't picking up hg from its virtualenv instead of /usr/bin.

Has anyone else encountered this problem? and is there a fix/workaround for it (other than horrible links to /usr/bin/hg)?

Any advice gratefully received!

Best wishes

Peter

--
Peter Briggs peter.briggs@manchester.ac.uk
Bioinformatics Core Facility University of Manchester
B.1083 Michael Smith Bldg Tel: (0161) 2751482

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