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Conan - The open-source C and C++ package manager
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[bug] ContextualVersionConflict due to Pylint -> Astroid -> Six #6074

Closed testworksau closed 4 years ago

testworksau commented 5 years ago

Conan depends on pylint: pylint>=2.0,!=2.3.0; python_version >= '3' Pylint version 2.4.3 depends on astroid: "astroid>=2.3.0,<2.4" astroid 2.3.3 depends on six~=1.12 (minimum 1.12, so will take 1.13 if available) conan requires six < 1.13

Result:

pkg_resources.ContextualVersionConflict: (six 1.13.0 (c:\python36\lib\site-packages), Requirement.parse('six<1.13,>=1.10.0'), {'conan'})

Environment Details (include every applicable attribute)

Steps to reproduce (Include if Applicable)

Install conan in python

As an aside, I'm curious as to why Conan requires Pylint to build conan packages.

jgsogo commented 5 years ago

I see that Astroid 2.3.3 depends on six~=1.12: https://github.com/PyCQA/astroid/blob/ace7b2967ea762ec43fc7be8ab9c8007564d9be2/astroid/__pkginfo__.py#L26

The last change has been introduced by Pylint relaxing Astroid here (https://github.com/PyCQA/pylint/commit/16cb696cba36ae4f8710e7a40ee48f07abbe976c), now it is astroid>=2.3.0,<=2.5 instead of <2.4.

But none of this is originating the issue, the problem is the availability of six 1.13, if you have it in your working environment, or any dependency selects it first, then Conan will fail to install. I think we can/should relax our six requirement.

Why Conan uses pylint? Because we are linting the recipes and warning the user (someone may rely in these warnings). This is something we'd really like to remove from Conan codebase into a hook: https://github.com/conan-io/conan/issues/4454

jgsogo commented 5 years ago

Hi, @testworksau . Although theoretically it can be a conflict there, we've been running some installations (Windows, Mac, Linux) and it always works, pip handles the six version properly.

How did you come across this issue? Anything else besides pip install conan?

uilianries commented 5 years ago

Hi @testworksau ! Which pip version are you running? pip --version

testworksau commented 5 years ago

Hi @uilianries and @jgsogo - here's an excerpt of a log on a brand new, never had anything run on it before build agent.

Which pip version are you running?

19.3.1:

Requirement already up-to-date: pip in c:\python36\lib\site-packages (19.3.1)

We install conan and conan-package-tools in each of our conan repositories via a single python requirement, named `iress-conan-utils. This has the following dependencies defined:

conan_package_tools>=0.30.3,<0.31.0 conan>=1.19.4,<1.20.0 lxml javaproperties networkx pydot PyGithub

PyGitHub and javaproperties both require Six (the former = Any, the latter = ~=1.4). I guess this highlights that there are many python libraries that, if installed prior to conan, could potentially break conan.

Here's the full output from our (failing) installation of conan:

Looking in indexes: simple
Collecting iress-conan-utils
  Downloading iress-conan-utils/iress_conan_utils-4.0.66-py3-none-any.whl (113kB)
Collecting PyGithub
  Downloading packages/packages/f4/86/7206d9b47cfdd5880081fdd1c94d9615cb6e10f4db1e98eb5b358839bc2a/PyGithub-1.44.1.tar.gz (110kB)
Collecting conan<1.20.0,>=1.19.4
  Downloading packages/packages/9d/29/ed39c9cb9a2a802fa991e5025a31e04b24add3a395d7fc22df42442700eb/conan-1.19.4.tar.gz (894kB)
Collecting networkx
  Downloading packages/packages/41/8f/dd6a8e85946def36e4f2c69c84219af0fa5e832b018c970e92f2ad337e45/networkx-2.4-py3-none-any.whl (1.6MB)
Collecting lxml
  Downloading packages/packages/6f/6d/d54317403070fcaae973f38b9c298e4b4c101b469ae51afa7c1370e5c35b/lxml-4.4.1-cp36-cp36m-win_amd64.whl (3.7MB)
Collecting javaproperties
  Downloading packages/packages/3e/ab/273a862537551fc7845871c59abc2eecb74ae53633c1f019d16eb5c2e121/javaproperties-0.5.2-py2.py3-none-any.whl
Collecting pydot
  Downloading packages/packages/33/d1/b1479a770f66d962f545c2101630ce1d5592d90cb4f083d38862e93d16d2/pydot-1.4.1-py2.py3-none-any.whl
Collecting conan-package-tools<0.31.0,>=0.30.3
  Downloading packages/packages/b1/31/4e7a3f99972e8743b3d325ba9f23ccafbad68bbce0815bdbfc4479ec1cd5/conan_package_tools-0.30.3.tar.gz (58kB)
Collecting deprecated
  Downloading packages/packages/f6/89/62912e01f3cede11edcc0abf81298e3439d9c06c8dce644369380ed13f6d/Deprecated-1.2.7-py2.py3-none-any.whl
Collecting pyjwt
  Downloading packages/packages/87/8b/6a9f14b5f781697e51259d81657e6048fd31a113229cf346880bb7545565/PyJWT-1.7.1-py2.py3-none-any.whl
Collecting requests>=2.14.0
  Downloading packages/packages/51/bd/23c926cd341ea6b7dd0b2a00aba99ae0f828be89d72b2190f27c11d4b7fb/requests-2.22.0-py2.py3-none-any.whl (57kB)
Collecting six
  Downloading packages/packages/65/26/32b8464df2a97e6dd1b656ed26b2c194606c16fe163c695a992b36c11cdf/six-1.13.0-py2.py3-none-any.whl
Collecting urllib3!=1.25.4,!=1.25.5
  Downloading packages/packages/b4/40/a9837291310ee1ccc242ceb6ebfd9eb21539649f193a7c8c86ba15b98539/urllib3-1.25.7-py2.py3-none-any.whl (125kB)
Collecting colorama<0.5.0,>=0.3.3
  Downloading packages/packages/4f/a6/728666f39bfff1719fc94c481890b2106837da9318031f71a8424b662e12/colorama-0.4.1-py2.py3-none-any.whl
Collecting PyYAML<6.0,>=3.11
  Downloading packages/packages/76/da/60f8d638d81d64db4ed3c279c22eb3a1eebfcde6130fee678940e603b930/PyYAML-5.1.2-cp36-cp36m-win_amd64.whl (214kB)
Collecting patch==1.16
  Downloading packages/packages/da/74/0815f03c82f4dc738e2bfc5f8966f682bebcc809f30c8e306e6cc7156a99/patch-1.16.zip
Collecting fasteners>=0.14.1
  Downloading packages/packages/18/bd/55eb2d6397b9c0e263af9d091ebdb756b15756029b3cededf6461481bc63/fasteners-0.15-py2.py3-none-any.whl
Collecting node-semver==0.6.1
  Downloading packages/packages/08/51/6cf3a2b18ca35cbe4ad3c7538a7c3dc0cb24e71629fb16e729c137d06432/node_semver-0.6.1-py3-none-any.whl
Collecting distro<1.2.0,>=1.0.2
  Downloading packages/packages/b0/55/29bfd4d4d4149e860ed01aa446108eb17b240997b746c06a2d0c8ce04f69/distro-1.1.0-py2.py3-none-any.whl
Collecting future<0.19.0,>=0.16.0
  Downloading packages/packages/45/0b/38b06fd9b92dc2b68d58b75f900e97884c45bedd2ff83203d933cf5851c9/future-0.18.2.tar.gz (829kB)
Collecting pygments<3.0,>=2.0
  Downloading packages/packages/5c/73/1dfa428150e3ccb0fa3e68db406e5be48698f2a979ccbcec795f28f44048/Pygments-2.4.2-py2.py3-none-any.whl (883kB)
Collecting deprecation<2.1,>=2.0
  Downloading packages/packages/b9/2a/d5084a8781398cea745c01237b95d9762c382697c63760a95cc6a814ad3a/deprecation-2.0.7-py2.py3-none-any.whl
Collecting tqdm<5,>=4.28.1
  Downloading packages/packages/b9/08/8505f192efc72bfafec79655e1d8351d219e2b80b0dec4ae71f50934c17a/tqdm-4.38.0-py2.py3-none-any.whl (53kB)
Collecting Jinja2<3,>=2.3
  Downloading packages/packages/65/e0/eb35e762802015cab1ccee04e8a277b03f1d8e53da3ec3106882ec42558b/Jinja2-2.10.3-py2.py3-none-any.whl (125kB)
Collecting python-dateutil<3,>=2.7.0
  Downloading packages/packages/d4/70/d60450c3dd48ef87586924207ae8907090de0b306af2bce5d134d78615cb/python_dateutil-2.8.1-py2.py3-none-any.whl (227kB)
Collecting bottle<0.13,>=0.12.8
  Downloading packages/packages/69/d1/efdd0a5584169cdf791d726264089ce5d96846a8978c44ac6e13ae234327/bottle-0.12.17-py3-none-any.whl (89kB)
Collecting pluginbase<1.0,>=0.5
  Downloading packages/packages/6e/f4/1db0a26c1c7fad81a1214ad1b02839a7bd98d8ba68f782f6edcc3d343441/pluginbase-0.7.tar.gz (40kB)
Collecting pylint!=2.3.0,>=2.0
  Downloading packages/packages/e9/59/43fc36c5ee316bb9aeb7cf5329cdbdca89e5749c34d5602753827c0aa2dc/pylint-2.4.4-py3-none-any.whl (302kB)
Collecting astroid>=2.2.0
  Downloading packages/packages/ad/ae/86734823047962e7b8c8529186a1ac4a7ca19aaf1aa0c7713c022ef593fd/astroid-2.3.3-py3-none-any.whl (205kB)
Collecting decorator>=4.3.0
  Downloading packages/packages/8f/b7/f329cfdc75f3d28d12c65980e4469e2fa373f1953f5df6e370e84ea2e875/decorator-4.4.1-py2.py3-none-any.whl
Collecting pyparsing>=2.1.4
  Downloading packages/packages/c0/0c/fc2e007d9a992d997f04a80125b0f183da7fb554f1de701bbb70a8e7d479/pyparsing-2.4.5-py2.py3-none-any.whl (67kB)
Collecting tabulate==0.8.2
  Downloading packages/packages/12/c2/11d6845db5edf1295bc08b2f488cf5937806586afe42936c3f34c097ebdc/tabulate-0.8.2.tar.gz (45kB)
Collecting wrapt<2,>=1.10
  Downloading packages/packages/23/84/323c2415280bc4fc880ac5050dddfb3c8062c2552b34c2e512eb4aa68f79/wrapt-1.11.2.tar.gz
Collecting chardet<3.1.0,>=3.0.2
  Downloading packages/packages/bc/a9/01ffebfb562e4274b6487b4bb1ddec7ca55ec7510b22e4c51f14098443b8/chardet-3.0.4-py2.py3-none-any.whl (133kB)
Collecting idna<2.9,>=2.5
  Downloading packages/packages/14/2c/cd551d81dbe15200be1cf41cd03869a46fe7226e7450af7a6545bfc474c9/idna-2.8-py2.py3-none-any.whl (58kB)
Collecting certifi>=2017.4.17
  Downloading packages/packages/18/b0/8146a4f8dd402f60744fa380bc73ca47303cccf8b9190fd16a827281eac2/certifi-2019.9.11-py2.py3-none-any.whl (154kB)
Collecting monotonic>=0.1
  Downloading packages/packages/ac/aa/063eca6a416f397bd99552c534c6d11d57f58f2e94c14780f3bbf818c4cf/monotonic-1.5-py2.py3-none-any.whl
Collecting packaging
  Downloading packages/packages/cf/94/9672c2d4b126e74c4496c6b3c58a8b51d6419267be9e70660ba23374c875/packaging-19.2-py2.py3-none-any.whl
Collecting MarkupSafe>=0.23
  Downloading packages/packages/b9/82/833c7714951bff8f502ed054e6fbd8bd00e083d1fd96de6a46905cf23378/MarkupSafe-1.1.1-cp36-cp36m-win_amd64.whl
Collecting isort<5,>=4.2.5
  Downloading packages/packages/e5/b0/c121fd1fa3419ea9bfd55c7f9c4fedfec5143208d8c7ad3ce3db6c623c21/isort-4.3.21-py2.py3-none-any.whl (42kB)
Collecting mccabe<0.7,>=0.6
  Downloading packages/packages/87/89/479dc97e18549e21354893e4ee4ef36db1d237534982482c3681ee6e7b57/mccabe-0.6.1-py2.py3-none-any.whl
Collecting typed-ast<1.5,>=1.4.0; implementation_name == "cpython" and python_version < "3.8"
  Downloading packages/packages/fb/fc/a96a9ebe9e0f86a9ac65e0dd0d2dd02f3cc43b838c150169a5b56739b945/typed_ast-1.4.0-cp36-cp36m-win_amd64.whl (155kB)
Collecting lazy-object-proxy==1.4.*
  Downloading packages/packages/ae/fe/98f7c4717f1581eefc19eac54d430e4e47722d9b0dc5a7e485c3e42a5ff2/lazy_object_proxy-1.4.3-cp36-cp36m-win_amd64.whl
Installing collected packages: wrapt, deprecated, pyjwt, urllib3, chardet, idna, certifi, requests, six, PyGithub, colorama, PyYAML, patch, monotonic, fasteners, node-semver, distro, future, pygments, pyparsing, packaging, deprecation, tqdm, MarkupSafe, Jinja2, python-dateutil, bottle, pluginbase, typed-ast, lazy-object-proxy, astroid, isort, mccabe, pylint, conan, decorator, networkx, lxml, javaproperties, pydot, tabulate, conan-package-tools, iress-conan-utils
    Running setup.py install for wrapt: started
W:ERROR: conan 1.19.4 has requirement six<1.13,>=1.10.0, but you'll have six 1.13.0 which is incompatible.
W:ERROR: conan-package-tools 0.30.3 has requirement six<1.13.0,>=1.10.0, but you'll have six 1.13.0 which is incompatible.
lasote commented 5 years ago

I cannot reproduce the issue not even in Windows py3 with the list of requirements you provided ends just ok. Even if I install first PyGitHub, later six gets downgraded to the compatible version conan requires.

testworksau commented 5 years ago

@lasote well I don't know what more I can tell you - the log above clearly shows it is happening.

Literally all of the other dependencies I have mentioned only specify a minimum version for six. Why is Conan so restrictive?

nleo commented 5 years ago

Same problem

# conan --version
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 574, in _build_master
    ws.require(__requires__)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 892, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 783, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (six 1.11.0 (/usr/lib/python3/dist-packages), Requirement.parse('six~=1.12'), {'astroid'})

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/bin/conan", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3088, in <module>
    @_call_aside
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3072, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3101, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 576, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 589, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 783, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (six 1.11.0 (/usr/lib/python3/dist-packages), Requirement.parse('six~=1.12'), {'astroid'})
nleo commented 5 years ago

I tryed to dowgrade

# pip3 install conan==1.11.3
Collecting conan==1.11.3
  Downloading https://files.pythonhosted.org/packages/a4/e0/3b2bf8102423789841b6c74178905819a7b69ccf37767f5cfeef4d1e399f/conan-1.11.3.tar.gz (756kB)
     |████████████████████████████████| 757kB 166kB/s 
Requirement already satisfied: PyJWT<2.0.0,>=1.4.0 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (1.7.1)
Requirement already satisfied: PyYAML<3.14.0,>=3.11 in /usr/lib/python3/dist-packages (from conan==1.11.3) (3.12)
Requirement already satisfied: astroid>=1.6.5 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (2.3.3)
Requirement already satisfied: bottle<0.13,>=0.12.8 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (0.12.17)
Requirement already satisfied: colorama<0.5.0,>=0.3.3 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (0.4.1)
Requirement already satisfied: deprecation<2.1,>=2.0 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (2.0.7)
Requirement already satisfied: distro<1.2.0,>=1.0.2 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (1.1.0)
Requirement already satisfied: fasteners>=0.14.1 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (0.15)
Requirement already satisfied: future==0.16.0 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (0.16.0)
Requirement already satisfied: node-semver==0.6.1 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (0.6.1)
Requirement already satisfied: patch==1.16 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (1.16)
Requirement already satisfied: pluginbase<1.0,>=0.5 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (0.7)
Requirement already satisfied: pygments<3.0,>=2.0 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (2.4.2)
Requirement already satisfied: pylint>=1.9.3 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (2.4.4)
Requirement already satisfied: requests<3.0.0,>=2.7.0 in /usr/lib/python3/dist-packages (from conan==1.11.3) (2.18.4)
Requirement already satisfied: six<1.13,>=1.10.0 in /usr/lib/python3/dist-packages (from conan==1.11.3) (1.11.0)
Requirement already satisfied: tqdm<5,>=4.28.1 in /usr/local/lib/python3.6/dist-packages (from conan==1.11.3) (4.38.0)
Requirement already satisfied: typed-ast<1.5,>=1.4.0; implementation_name == "cpython" and python_version < "3.8" in /usr/local/lib/python3.6/dist-packages (from astroid>=1.6.5->conan==1.11.3) (1.4.0)
Requirement already satisfied: lazy-object-proxy==1.4.* in /usr/local/lib/python3.6/dist-packages (from astroid>=1.6.5->conan==1.11.3) (1.4.3)
Requirement already satisfied: wrapt==1.11.* in /usr/local/lib/python3.6/dist-packages (from astroid>=1.6.5->conan==1.11.3) (1.11.2)
Requirement already satisfied: packaging in /usr/local/lib/python3.6/dist-packages (from deprecation<2.1,>=2.0->conan==1.11.3) (19.2)
Requirement already satisfied: monotonic>=0.1 in /usr/local/lib/python3.6/dist-packages (from fasteners>=0.14.1->conan==1.11.3) (1.5)
Requirement already satisfied: isort<5,>=4.2.5 in /usr/local/lib/python3.6/dist-packages (from pylint>=1.9.3->conan==1.11.3) (4.3.21)
Requirement already satisfied: mccabe<0.7,>=0.6 in /usr/local/lib/python3.6/dist-packages (from pylint>=1.9.3->conan==1.11.3) (0.6.1)
Requirement already satisfied: pyparsing>=2.0.2 in /usr/local/lib/python3.6/dist-packages (from packaging->deprecation<2.1,>=2.0->conan==1.11.3) (2.4.5)
Installing collected packages: conan
  Found existing installation: conan 1.18.5
    Uninstalling conan-1.18.5:
      Successfully uninstalled conan-1.18.5
    Running setup.py install for conan ... done
Successfully installed conan-1.11.3

no luck

nleo commented 5 years ago

Tried different vertions:

pip3 install conan
pip3 install conan==1.18.5
pip3 install conan==1.11.3
lasote commented 5 years ago

@nleo we need to know which packages do you previously have in the environment you are trying to install conan.

memsharded commented 5 years ago

Literally all of the other dependencies I have mentioned only specify a minimum version for six. Why is Conan so restrictive?

Hi @testworksau

I am sorry that you are experiencing this problem. We are not being that restrictive for no reason, the problem is that Conan dependencies (pylint, astroid), decided to hardcode a fixed dependency to six in their latest release, massively breaking us. We have tried to adapt to it, and minimizing the impact of such restrictive policy they imposed, we had to release patches for all previous Conan versions down to 1.7, that was a huge effort for us too. But it is being difficult to reproduce it or even reduce the impact for other scenarios where users have other environments.

nleo commented 5 years ago

I have fresh installation of Linux Mint 19.2

I installed youtube-dl

And try to compile a lib, on that depends rails app, on which I'm working on.

I installed conan, and can't compile a lib.

That's all.

I'm not C++ or Python developer.

$ cat conanfile.txt 
[requires]
jsonformoderncpp/2.1.1@vthiery/stable
catch2/2.2.1@bincrafters/stable

[generators]
cmake

C++ lib shares common logick though rails, Android, and iOS

sudo apt-get install cmake swig python-pip
pip install conan
lasote commented 5 years ago

@nleo thanks for the info. Will investigate and report.

nleo commented 5 years ago

I tried repoduce on VB, unsuccessfully

Install ubuntu-18.04.3-live-server-amd64.iso on VBox

apt update && apt upgrade

apt install -y python3-pip python3-setuptools
pip3 install --upgrade pip
pip3 install --upgrade youtube_dl
pip3 install conan
# pip3 install conan
oot/.cache/pip/wheels/d7/de/2e/efa132238792efb6459a96e85916ef8597fcb3d2ae51590dfd
Successfully built conan future patch-ng pluginbase wrapt
ERROR: astroid 2.3.3 has requirement six~=1.12, but you'll have six 1.11.0 which is incompatible.
Installing collected packages: bottle, pyparsing, packaging, deprecation, distro, monotonic, fasteners, future, node-semver, patch-ng, pluginbase, pygments, python-dateutil, tqdm, lazy-object-proxy, wrapt, typed-ast, astroid, mccabe, isort, pylint, conan
Successfully installed astroid-2.3.3 bottle-0.12.17 conan-1.20.3 deprecation-2.0.7 distro-1.1.0 fasteners-0.15 future-0.18.2 isort-4.3.21 lazy-object-proxy-1.4.3 mccabe-0.6.1 monotonic-1.5 node-semver-0.6.1 packaging-19.2 patch-ng-1.17.1 pluginbase-0.7 pygments-2.4.2 pylint-2.4.4 pyparsing-2.4.5 python-dateutil-2.8.1 tqdm-4.38.0 typed-ast-1.4.0 wrapt-1.11.2

conan -v - works

# conan -v
Conan version 1.20.3

And build works - ok

lasote commented 5 years ago

In my case, playing with Mint in docker, everything installs correctly but then running conan:

pkg_resources.ContextualVersionConflict: (six 1.11.0 (/usr/lib/python3/dist-packages), Requirement.parse('six~=1.12'), {'astroid'})

If I install pip install six==1.12 the problem is solved.

So, we have possibles issues with the lower value for the six range and also for the higher... I think we should try to remove the dependency to astroid/pylint in next release and try to do a plugin, this version missmatch with astroid is a never ending issue.

testworksau commented 5 years ago

I am sorry that you are experiencing this problem. We are not being that restrictive for no reason, the problem is that Conan dependencies (pylint, astroid), decided to hardcode a fixed dependency to six in their latest release, massively breaking us.

Hi @memsharded - I understand the original reason for your hard pin, but feel that it shouldn't be required anymore.

I've compiled a bit of a timeline:

Sep 25 2019 astroid hard pins six to 1.12 which is the latest version at the time. This change is released in astroid 2.3.1. Previously, there was no upper limit.

conan continues to work fine as conan's six version is >= 1.10

Nov 6 2019 six released a new version, 1.13.

conan breaks as it selects six 1.13 instead of 1.12

Nov 6 2019 conan hard pins six to 1.12, via @uilanries, to ensure the astroid hard pin is met.

Nov 6 2019 conan relaxes six hard pin back to six >= 1.10 but reduces upper limit to 1.12.x.

conan starts working again for most

Nov 7 2019 astroid relaxes the pin of six to minimum six 1.12, via @uilanries, and releases astroid 2.3.3

Nov 13 2019 pylint changes to allow astroid 2.4.x as well as 2.3.x. It has no direct dependency on six, only an indirect dependency via astroid. The change to relax astroid has no effect on conan as there is no version 2.4.x of astroid yet.

Correct me if I'm wrong, but based on the information above, on the 7th November (after the new astroid release), the conan hard pin could have been relaxed to six~=1.12 to match astroids new minimum requirements.

Given:

I can't see why modifying conan to require six~=1.12 would break anyone.

That said:

we should try to remove the dependency to astroid/pylint in next release and try to do a plugin

this would be fantastic!

memsharded commented 4 years ago

astroid and pylint dependencies have been removed from the conan codebase. They were required only for the recipe linter, and that has been moved to a hook. This will be effective in Conan 1.21 to be released soon.

Foadsf commented 4 years ago

I just had the same problem on macOS:

ERROR: astroid 2.3.3 has requirement wrapt==1.11.*, but you'll have wrapt 1.12.0 which is incompatible.

for the moment downgrading wrapt should help. From here run:

pip3 install -Iv 'wrapt==<veriosn>'
memsharded commented 4 years ago

Hi @Foadsf

Pylint and Astroid are no longer Conan dependencies: https://github.com/conan-io/conan/blob/develop/conans/requirements.txt

If you are using a recent Conan version, this shouldn't be an issue anymore, please check.