Merge branch 'master' into cereal

Signed-off-by: Omar Shrit <omar@shrit.me>

.github/workflows/main.yml

@@ -8,13 +8,31 @@ on:
       - master
   release:
     types: [published, created, edited]
+name: R CMD check mlpack
 
 jobs:
+  cancel:
+    name: 'Cancel Previous Builds'
+    if: ${{ github.event_name == 'pull_request' && github.repository == 'mlpack/mlpack' }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 3
+    steps:
+      - name: Get all workflow ids and set to env variable
+        run: echo ::set-env name=WORKFLOW_IDS_TO_CANCEL::$(curl https://api.github.com/repos/${GITHUB_REPOSITORY}/actions/workflows -s | jq -r '.workflows | map(.id|tostring) | join(",")')
+
+      - uses: styfle/cancel-workflow-action@0.5.0
+        with:
+          workflow_id: ${{ env.WORKFLOW_IDS_TO_CANCEL }}
+          access_token: ${{ secrets.GITHUB_TOKEN }}
+
   jobR:
-    name: mlpack-R
+    name: Build mlpack_r_tarball
+    if: ${{ github.repository == 'mlpack/mlpack' }}
     runs-on: ubuntu-20.04
+
     outputs:
       r_bindings: ${{ steps.mlpack_version.outputs.mlpack_r_package }}
+
     steps:
         - uses: actions/checkout@v2
 
@@ -27,6 +45,23 @@ jobs:
             MLPACK_VERSION_VALUE=${MLPACK_VERSION_MAJOR}.${MLPACK_VERSION_MINOR}.${MLPACK_VERSION_PATCH}
             echo ::set-output name=mlpack_r_package::$(echo mlpack_"$MLPACK_VERSION_VALUE".tar.gz)
 
+        - uses: r-lib/actions/setup-r@master
+          with:
+            r-version: release
+
+        - name: Query dependencies
+          run: |
+            cp src/mlpack/bindings/R/mlpack/DESCRIPTION.in DESCRIPTION
+            Rscript -e "install.packages('remotes')" -e "saveRDS(remotes::dev_package_deps(dependencies = TRUE), 'depends.Rds')"
+
+        - name: Cache R packages
+          if: runner.os != 'Windows'
+          uses: actions/cache@v1
+          with:
+            path: ${{ env.R_LIBS_USER }}
+            key: ${{ runner.os }}-r-release-${{ hashFiles('depends.Rds') }}
+            restore-keys: ${{ runner.os }}-r-release-
+
         - name: Install Build Dependencies
           run: |
             sudo apt-get update
@@ -38,6 +73,12 @@ jobs:
             sudo apt-get install -y r-base-core
             sudo Rscript -e "install.packages(c('Rcpp', 'RcppArmadillo', 'RcppEnsmallen', 'BH', 'roxygen2', 'testthat', 'Rcereal'))"
 
+        - name: Install R-bindings dependencies
+          run: |
+            remotes::install_deps(dependencies = TRUE)
+            remotes::install_cran("roxygen2")
+          shell: Rscript {0}
+
         - name: CMake
           run: |
             mkdir build
@@ -58,6 +99,7 @@ jobs:
     runs-on: ${{ matrix.config.os }}
 
     name: ${{ matrix.config.os }} (${{ matrix.config.r }})
+    if: ${{ github.repository == 'mlpack/mlpack' }}
 
     strategy:
       fail-fast: false
@@ -74,6 +116,8 @@ jobs:
       R_CHECK_ARGS: "--no-build-vignettes"
       _R_CHECK_FORCE_SUGGESTS: 0
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
+      RSPM: ${{ matrix.config.rspm }}
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
       - uses: actions/download-artifact@v2
@@ -86,10 +130,24 @@ jobs:
 
       - uses: r-lib/actions/setup-pandoc@master
 
+      - name: Query dependencies
+        run: Rscript -e "install.packages('remotes')" -e "saveRDS(remotes::dev_package_deps('${{ needs.jobR.outputs.r_bindings }}', dependencies = TRUE), 'depends.Rds')"
+
+      - name: Cache R packages
+        if: runner.os != 'Windows'
+        uses: actions/cache@v1
+        with:
+          path: ${{ env.R_LIBS_USER }}
+          key: ${{ runner.os }}-r-${{ matrix.config.r }}-${{ hashFiles('depends.Rds') }}
+          restore-keys: ${{ runner.os }}-r-${{ matrix.config.r }}-
+
       - name: Install dependencies
         run: |
           Rscript -e "install.packages('remotes')" -e "remotes::install_cran('rcmdcheck')"
           Rscript -e "install.packages(c('Rcpp', 'RcppArmadillo', 'RcppEnsmallen', 'BH', 'roxygen2', 'testthat', 'Rcereal'))"
+          remotes::install_deps('${{ needs.jobR.outputs.r_bindings }}', dependencies = TRUE)
+          remotes::install_cran("rcmdcheck")
+        shell: Rscript {0}
 
       - name: Check
         run: Rscript -e "rcmdcheck::rcmdcheck('${{ needs.jobR.outputs.r_bindings }}', args = c('--no-manual','--as-cran'), error_on = 'warning', check_dir = 'check')"