GitLab

* [ci] use conda-forge in CI jobs (fixes #4948)

* comment out more jobs

* try reverting graphviz patch, running more cuda jobs

* get graphviz from PyPI and try removing some patches for r-lintr

* start running appveyor again

* use conda-forge if using conda

* fix commands

* conda install graphviz

* try newer openmp

* pin below openmp 11.x

* focus on gpu task

* trying to narrow down error

* maybe gcc11 is the issue

* start adding other tests back

* pin openmp too

* maybe need to pin to gcc less than 10.x

* pin libgfortran and libstdcxx as well

* pin to gcc 9.3.0

* move constraints up to initial environment

* add all CI jobs back

* try installing python-graphviz separately

* try new lightgbm/vsts-agent image

* fix typo

* test if pinning gcc for linux gpu_source build is still necessary

* ok yes, pinning gcc is necessary

* test if Linux gpu_source works with Python 3.9.6

* no special exception for Linux gpu_source job

* pin to Python 3.9.6 in Linux gpu_source

* try explicitly asking for libstdcxx-ng for every linux build

* swap compilers

* switch compilers back

* revert accidental whitespace change

* comment out CI

* try Linux gpu_source with different Python versions

* Revert "try Linux gpu_source with different Python versions"

This reverts commit f6f63cbb9b4a9cf138f3580ae4223a8acdd0e94a.

* Revert "comment out CI"

This reverts commit ece191f01e3650c2f325e80ff86bfc8c485fb7bc.

* remove libxml2 install, change CONDA path

* avoid installing conda in rchk job

* empty commit 1

* empty commit 2

* empty commit 3

* empty commit 4

* add more verbose logging around installation of python-graphviz

* empty commit 1

* get mamba info

* get more conda info

* add another mamba info call

* allow for other macOS environments in GHA configuration

* Revert "allow for other macOS environments in GHA configuration"

This reverts commit a3c7a19926be94e3719f5ae9100fbe30e87b35da.

* get more logs from mamba

* get Build.ArtifactsStagingDirectory

* get more logs and try to force re-installing everything

* clean cache after every step

* remove --update-all and make logs less verbose

* remove more print statements and uncomment jobs

* test if conda-clean issue fixes segfaults for gpu_source

* pin python version for gpu_source

* empty commit 1

* use miniforge instead

* empty commit 1

* Apply suggestions from code review

* bring workarounds back

* remove duplicated graphviz system-wide installation (reverts #4095, #4097, #4238)

* empty commit 1

* empty commit 2

* empty commit 3

* empty commit 4

* empty commit 5

* empty commit 6

* empty commit 7

* empty commit 8

* empty commit 9

* empty commit 10

* empty commit 10

* empty commit 10

* empty commit 10

* empty commit 11

* one more try

* try to downgrade Python version for Linux GPU job

* swap compilers

* Revert "swap compilers"

This reverts commit f04dc27b17920a69cbcba1254a8e109ce9791154.
Co-authored-by: Nikita Titov <nekit94-12@hotmail.com>
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>