GitLab

* [docs] update badges in README

* Update README.md
Co-authored-by: Oliver Borchert <oliver.borchert@quantco.com>

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Co-authored-by: Oliver Borchert <oliver.borchert@quantco.com>

* dev

* dev

* dev

* Update static_analysis.yml

* Update .pre-commit-config.yaml

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Co-authored-by: James Lamb <jaylamb20@gmail.com>

* [c++] default to C++17 for most builds

* more updates

* fix formatting

[ci][docs] fix link checking action by switching from linkchecker to lychee and update some links (#7027)

* [ci] [swig] move SWIG jobs to GitHub Actions

* set compiler for Windows jobs

* skip conda setup on jobs that do not need it

* fix BUILD_DIRECTORY, add uploads

* fix more variables

* ensure artifact-upload directory actually exists

* more fixes

* set CONDA

* fix powershell env variable check, add conda to path for linux and macos

* fix comment

* remove AZURE env variable

* use absolute path

* Apply suggestions from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* create directory unconditionally

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Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* [ci] move C++ tests to GitHub Actions

* skip more CI

* fix env variables

* fix some small things

* fix software setup

* add sudo

* UBUNTU_BASE_CONTAINER (spelling)

* fix condition on manylinux image

* restore other CI

* remove if-else from python_package

* define BUILD_ARTIFACTSTAGINGDIRECTORY for cpp jobs

* Apply suggestions from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

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Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* Update .appveyor.yml

* Update .appveyor.yml

* Update test_arrow.py

* Update test_arrow.py

* Update .appveyor.yml

* Update test_arrow.py

* [ci] move R-package artifact publishing to GitHub Actions

* create artifacts directory

* ensure both files are included

* restore other CI

* create artifacts directory unconditionally

* Update .github/workflows/r_package.yml
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

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Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* Update setup.sh

* Update build-docs.sh

* Update test-windows.ps1

* [ci] [C++] drop support for Visual Studio 2015 (fixes #6803)

* update more references

* [ci] some additional changes to drop VS2015 and make it work from solution file (#7046)

* Update LightGBM.vcxproj

* Update LightGBM.vcxproj.filters

* Update Installation-Guide.rst

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Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* Add competitions

* Simplify links

* Remove 1st place

Co-authored-by: Nikita Titov <nekit94-08@mail.ru>
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* [docs] update Ray section

* [docs] add Ray to external repositories

* [docs] simplify Ray note

Bumps the ci-dependencies group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 4 to 5
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v5

)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: ci-dependencies
...
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* [ci] separate configs and scripts for linting and docs CI

* update name

* remove lint-cpp reference

* Update .ci/lint-all.sh

* Update .ci/lint-all.sh
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* revert env: blocks

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Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* [python-package] Fix mypy checks in `engine.py`

* Update python-package/lightgbm/engine.py

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Co-authored-by: James Lamb <jaylamb20@gmail.com>

* [ci] [c++] use 'pre-commit' to run 'cpplint', upgrade to 'cpplint' 2.0.2

* remove bashisms

* one more pipefail use

* another pipefail

Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* [docs] [python-package] document how to run Python tests

* refer to installation instructions

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Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* [ci] try pinning openjpeg

* pin even more

* only pin graphite2

* try removing all customizations

* restore all CI

* add a 'conda info'

* add a 'conda list' too

* move conda block in test.sh

* [ci] Drop support for Python 3.7 and Python 3.8

* Fix

* Bump numpy

* Fix

* fix comment, revert unrelated quoting changes

* add docs

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Co-authored-by: Nikita Titov <nekit94-08@mail.ru>
Co-authored-by: James Lamb <jaylamb20@gmail.com>

Co-authored-by: James Lamb <jaylamb20@gmail.com>

* [ci] combine pip installs in Python test scripts

* remove most CI

* Revert "remove most CI"

This reverts commit 8c0c1ec7b6e4e9f69190965abbf58b760efc8c6d.