Failed to install connan 1.8.2 on ubuntu16.04

[figroc]

I'm installing as

pip --no-cache-dir install conan conan_package_tools

As the time of installing, the latest version was 1.8.2. And,
the output logs:

Installing collected packages: PyJWT, colorama, patch, monotonic, fasteners, node-semver, distro, isort, wrapt, lazy-object-proxy, typed-ast, astroid, mccabe, pylint, deprecation, t
qdm, bottle, pluginbase, conan, idna, tabulate, conan-package-tools
  Running setup.py install for patch: started
    Running setup.py install for patch: finished with status 'done'
  Running setup.py install for wrapt: started
    Running setup.py install for wrapt: finished with status 'done'
  Found existing installation: tqdm 4.26.0
    Uninstalling tqdm-4.26.0:
      Successfully uninstalled tqdm-4.26.0
  Rolling back uninstall of tqdm
Could not install packages due to an EnvironmentError: [Errno 2] No such file or directory: '/usr/local/man/man1'

I switched the installing to version 1.7.4, and everything was good.

[danimtb]

Found a similar issue here tqdm/tqdm#460

Maybe you dont have that man directory or the right user permissions

[Croydon]

I just run into this two days ago on macOS Travis CI. It worked before but stopped working suddenly, it could be related to the 1.8.0 release, but I haven't tested that yet.

I have workaround that by doing this:

sudo mkdir -p /usr/local/man;
sudo chown -R "${USER}:admin" /usr/local/man;

Would be still nice to know where this is coming from

[danimtb]

I think this is actually coming from the tqdm dependency that was introduced in 1.8.0

cc/ @jgsogo

[figroc]

Actually I was building an image for C++ environment including conan tools. I really don't want to install man 😕

In version 1.8.2, it is required tqdm==4.20.0 strictly. Why can't it be 4.26.0?

[danimtb]

Hi @figroc,

Seems tqdm was downgraded due to an issue with python 2, you can see the conversation starting at this comment: #3545 (comment)

We will try to get it fixed for next release. Keep us posted if you workaround this in the meantime. Thank!

[jgsogo]

You can try to pip install in the user home directory by typping pip install --user conan conan_package_tools (or using a virtualenv). Let us know if the --user works for you.

About the tqdm update, I'm tracking the issue, I'll ping them and try to push it forward.

[Croydon]

This is affecting pretty much every project using Conan directly or indirectly, so this should probably getting a high priority. 🙈

[jgsogo]

Hi!

I don't think this can be tagged as a bug or even an issue, it has to do with system permissions and the way pip/python works. It's so common to come across a permissions denied error when installing packages system-wide with pip and the solution is to use sudo, install it per-user (with --user) or use a virtualenv.

We'll open the revision required for tqdm as soon as we identify a range without known issues, but chances to find this error again are 100% (@figroc would have been ok with his 4.26.0 version, but anyone without a tqdm installed could have got the error) . Right now there are several dependencies of Conan that requires elevated permissions to be installed system-wide, but usually, they are already installed so it doesn't complain.

We may change the docs and recommend installing Conan using the --user argument (although it would be even better to use a virtualenv). The --user is a long-standing discussion in the pip community and I hope it will be the default behavior anytime soon (more info: pypa/pip#1668).

[jgsogo]

We may change the docs and recommend installing Conan using the --user argument (although it would be even better to use a virtualenv).

What do you think about updating docs in this way, @conan-io/barbarians?

[danimtb]

I am willing improve the installation steps and clear the section of the docs by moving some things to FAQ for example

[jgsogo]

Also, there is a proposal for a temporary fix here #3785 (comment)

[lasote]

We will release 1.8.4 soon to fix this.