re-enable all CI

.appveyor.yml

@@ -0,0 +1,42 @@
+version: 4.5.0.99.{build}
+
+image: Visual Studio 2015
+platform: x64
+configuration:
+  - '3.8'
+
+# only build on 'master' and pull requests targeting it
+branches:
+  only:
+    - master
+
+environment:
+  matrix:
+    - COMPILER: MSVC
+      TASK: python
+    - COMPILER: MINGW
+      TASK: python
+
+clone_depth: 5
+
+install:
+  - git submodule update --init --recursive  # get `external_libs` folder
+  - set PATH=C:\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin;%PATH%
+  - set PYTHON_VERSION=%CONFIGURATION%
+  - ps: |
+      $env:ALLOW_SKIP_ARROW_TESTS = "1"
+      $env:APPVEYOR = "true"
+      $env:CMAKE_BUILD_PARALLEL_LEVEL = 4
+      $env:MINICONDA = "C:\Miniconda3-x64"
+      $env:PATH = "$env:MINICONDA;$env:MINICONDA\Scripts;$env:PATH"
+      $env:BUILD_SOURCESDIRECTORY = "$env:APPVEYOR_BUILD_FOLDER"
+
+build: false
+
+test_script:
+  - conda config --remove channels defaults
+  - conda config --add channels nodefaults
+  - conda config --add channels conda-forge
+  - conda config --set channel_priority strict
+  - conda init powershell
+  - powershell.exe -ExecutionPolicy Bypass -File %APPVEYOR_BUILD_FOLDER%\.ci\test-windows.ps1

.github/CODEOWNERS

@@ -0,0 +1,10 @@
+# This file controls default reviewers for LightGBM code.
+# See https://help.github.com/en/articles/about-code-owners
+# for details
+#
+# Maintainers are encouraged to use their best discretion in
+# setting reviewers on PRs manually, but this file should
+# offer a reasonable automatic best-guess
+
+# catch-all rule (this only gets matched if no rules below match)
+*    @guolinke @jameslamb @shiyu1994 @jmoralez @borchero @StrikerRUS

.github/ISSUE_TEMPLATE/BUG_REPORT.md

@@ -0,0 +1,26 @@
+---
+name: Bug Report 🐞
+about: Something isn't working as expected? Here is the right place to report.
+---
+
+## Description
+<!-- A clear description of the bug -->
+
+## Reproducible example
+<!-- Minimal code that exhibits this behavior -->
+
+## Environment info
+
+LightGBM version or commit hash:
+
+Command(s) you used to install LightGBM
+
+```shell
+
+```
+
+<!-- Put any additional environment information here -->
+
+
+## Additional Comments
+<!-- What else should we know? -->

.github/ISSUE_TEMPLATE/FEATURE_REQUEST.md

@@ -0,0 +1,25 @@
+---
+name: Feature Request 💡
+about: Suggest a new idea for the project.
+labels: enhancement, feature-request
+---
+
+<!--
+Please search your feature on previous issues and our feature requests consolidation hub (https://github.com/microsoft/LightGBM/issues/2302) before you open a new one.
+-->
+
+## Summary
+
+<!-- Briefly explain your feature proposal. -->
+
+## Motivation
+
+<!-- Why is it useful to have this feature in the LightGBM project? -->
+
+## Description
+
+<!-- Detailed description of the new feature. -->
+
+## References
+
+<!-- Any useful references, for instance, papers, implementations in other projects, draft code snippets, etc. -->

.github/dependabot.yml

@@ -0,0 +1,14 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: monthly
+    groups:
+      ci-dependencies:
+        patterns:
+          - "*"
+    commit-message:
+      prefix: "[ci]"
+    labels:
+      - maintenance

.github/release-drafter.yml

@@ -0,0 +1,20 @@
+name-template: 'v$NEXT_PATCH_VERSION'
+tag-template: 'v$NEXT_PATCH_VERSION'
+categories:
+  - title: '💡 New Features'
+    label: 'feature'
+  - title: '🔨 Breaking'
+    label: 'breaking'
+  - title: '🚀 Efficiency Improvement'
+    label: 'efficiency'
+  - title: '🐛 Bug Fixes'
+    label: 'fix'
+  - title: '📖 Documentation'
+    label: 'doc'
+  - title: '🧰 Maintenance'
+    label: 'maintenance'
+change-template: '- $TITLE @$AUTHOR (#$NUMBER)'
+template: |
+  ## Changes
+
+  $CHANGES

.github/workflows/cuda.yml

@@ -0,0 +1,136 @@
+name: CUDA Version
+
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - master
+  # Run manually by clicking a button in the UI
+  workflow_dispatch:
+    inputs:
+      restart_docker:
+        description: 'Restart nvidia-docker on the runner before building?'
+        required: true
+        type: boolean
+        default: false
+
+# automatically cancel in-progress builds if another commit is pushed
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  # Optionally reinstall + restart docker on the runner before building.
+  # This is safe as long as only 1 of these jobs runs at a time.
+  restart-docker:
+    name: set up docker
+    runs-on: [self-hosted, linux]
+    timeout-minutes: 30
+    steps:
+      - name: Setup or update software on host machine
+        if: ${{ inputs.restart_docker }}
+        run: |
+            # install core packages
+            sudo apt-get update
+            sudo apt-get install --no-install-recommends -y \
+                apt-transport-https \
+                ca-certificates \
+                curl \
+                gnupg-agent \
+                lsb-release \
+                software-properties-common
+            # set up nvidia-docker
+            curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+            sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" -y
+            curl -sL https://nvidia.github.io/nvidia-docker/gpgkey | sudo apt-key add -
+            curl -sL https://nvidia.github.io/nvidia-docker/$(. /etc/os-release;echo $ID$VERSION_ID)/nvidia-docker.list | sudo tee /etc/apt/sources.list.d/nvidia-docker.list
+            sudo apt-get update
+            sudo apt-get install --no-install-recommends -y \
+                containerd.io \
+                docker-ce \
+                docker-ce-cli \
+                nvidia-docker2
+            sudo chmod a+rw /var/run/docker.sock
+            sudo systemctl restart docker
+      - name: mark job successful
+        run: |
+          exit 0
+  test:
+    name: ${{ matrix.task }} ${{ matrix.cuda_version }} ${{ matrix.method }} (${{ matrix.linux_version }}, ${{ matrix.compiler }}, Python ${{ matrix.python_version }})
+    runs-on: [self-hosted, linux]
+    needs: [restart-docker]
+    container:
+      image: nvcr.io/nvidia/cuda:${{ matrix.cuda_version }}-devel-${{ matrix.linux_version }}
+      env:
+        CMAKE_BUILD_PARALLEL_LEVEL: 4
+        COMPILER: ${{ matrix.compiler }}
+        CONDA: /tmp/miniforge
+        DEBIAN_FRONTEND: noninteractive
+        METHOD: ${{ matrix.method }}
+        OS_NAME: linux
+        PYTHON_VERSION: ${{ matrix.python_version }}
+        TASK: ${{ matrix.task }}
+        SKBUILD_STRICT_CONFIG: true
+      options: --gpus all
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - method: wheel
+            compiler: gcc
+            python_version: "3.10"
+            cuda_version: "11.8.0"
+            linux_version: "ubuntu20.04"
+            task: cuda
+          - method: source
+            compiler: gcc
+            python_version: "3.12"
+            cuda_version: "12.2.0"
+            linux_version: "ubuntu22.04"
+            task: cuda
+          - method: pip
+            compiler: clang
+            python_version: "3.11"
+            cuda_version: "11.8.0"
+            linux_version: "ubuntu20.04"
+            task: cuda
+    steps:
+      - name: Install latest git and sudo
+        run: |
+          apt-get update
+          apt-get install --no-install-recommends -y \
+              ca-certificates \
+              software-properties-common
+          add-apt-repository ppa:git-core/ppa -y
+          apt-get update
+          apt-get install --no-install-recommends -y \
+              git \
+              sudo
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 5
+          submodules: true
+      - name: Setup and run tests
+        run: |
+          export BUILD_DIRECTORY="$GITHUB_WORKSPACE"
+          export PATH=$CONDA/bin:$PATH
+
+          # check GPU usage
+          nvidia-smi
+
+          # build and test
+          $GITHUB_WORKSPACE/.ci/setup.sh
+          $GITHUB_WORKSPACE/.ci/test.sh
+  all-cuda-jobs-successful:
+    if: always()
+    runs-on: ubuntu-latest
+    needs: [test]
+    steps:
+    - name: Note that all tests succeeded
+      uses: re-actors/[email protected]
+      with:
+        jobs: ${{ toJSON(needs) }}

.github/workflows/linkchecker.yml

@@ -0,0 +1,32 @@
+name: Link checks
+
+on:
+  # Run manually by clicking a button in the UI
+  workflow_dispatch:
+  # Run once a day at 8:00am UTC
+  schedule:
+    - cron: '0 8 * * *'
+
+env:
+  COMPILER: gcc
+  OS_NAME: 'linux'
+  PYTHON_VERSION: '3.12'
+  TASK: 'check-links'
+
+jobs:
+  check-links:
+    timeout-minutes: 60
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 5
+          submodules: false
+      - name: Setup and run tests
+        run: |
+          export BUILD_DIRECTORY="$GITHUB_WORKSPACE"
+          export CONDA=${HOME}/miniforge
+          export PATH=${CONDA}/bin:${HOME}/.local/bin:${PATH}
+          $GITHUB_WORKSPACE/.ci/setup.sh || exit 1
+          $GITHUB_WORKSPACE/.ci/test.sh || exit 1

.github/workflows/lock.yml

@@ -0,0 +1,45 @@
+name: 'Lock Inactive Threads'
+
+on:
+  schedule:
+    # midnight UTC, every Wednesday
+    - cron: '0 0 * * 3'
+  # allow manual triggering from GitHub UI
+  workflow_dispatch:
+
+permissions:
+  issues: write
+  pull-requests: write
+
+concurrency:
+  group: lock
+
+jobs:
+  action:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/lock-threads@v5
+        with:
+          github-token: ${{ github.token }}
+          # after how many days of inactivity should a closed issue/PR be locked?
+          issue-inactive-days: '365'
+          pr-inactive-days: '365'
+          # do not close feature request issues...
+          # we close those but track them in https://github.com/microsoft/LightGBM/issues/2302
+          exclude-any-issue-labels: 'feature request'
+          # what labels should be removed prior to locking?
+          remove-issue-labels: 'awaiting response,awaiting review,blocking,in progress'
+          remove-pr-labels: 'awaiting response,awaiting review,blocking,in progress'
+          # what message should be posted prior to locking?
+          issue-comment: >
+            This issue has been automatically locked since there has not been any recent activity since it was closed.
+            To start a new related discussion, open a new issue at https://github.com/microsoft/LightGBM/issues
+            including a reference to this.
+          pr-comment: >
+            This pull request has been automatically locked since there has not been any recent activity since it was closed.
+            To start a new related discussion, open a new issue at https://github.com/microsoft/LightGBM/issues
+            including a reference to this.
+          # what shoulld the locking status be?
+          issue-lock-reason: 'resolved'
+          pr-lock-reason: 'resolved'
+          process-only: 'issues, prs'

.github/workflows/no-response.yml

@@ -0,0 +1,27 @@
+name: No Response Bot
+
+permissions:
+  issues: write
+  pull-requests: write
+
+on:
+  issue_comment:
+    types: [created]
+  schedule:
+    # "every day at 04:00 UTC"
+    - cron: '0 4 * * *'
+
+jobs:
+  noResponse:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: lee-dohm/[email protected]
+        with:
+          closeComment: >
+              This issue has been automatically closed because it has been awaiting a response for too long.
+              When you have time to to work with the maintainers to resolve this issue, please post a new comment and it will be re-opened.
+              If the issue has been locked for editing by the time you return to it, please open a new issue and reference this one.
+              Thank you for taking the time to improve LightGBM!
+          daysUntilClose: 30
+          responseRequiredLabel: awaiting response
+          token: ${{ github.token }}