Adds a new subflow which checks the package against specific cran sna…

…pshot(s)

.github/workflows/Check-package.yaml

@@ -28,6 +28,11 @@ jobs:
     name: RMD check 📦
     uses: ./.github/workflows/R-CMD-check.yaml
 
+  # Runs R CMD check with specific version(s) of R and cran-snapshot
+  check-versions:
+    name: RMD check versions 📜
+    uses: ./.github/workflows/R-CMD-check-versions.yaml
+
   # Runs unittests while capturing code:cov and uploads to Codecov io. See local subflow
   test:
     name: Test 🧪

.github/workflows/R-CMD-check-versions.yaml

@@ -0,0 +1,70 @@
+---
+# R-CMD check which allows you to lock the R version and date of the CRAN snapshot.
+# This is particularly helpful for ensuring that the package works with internal systems.
+    on:
+      workflow_dispatch:
+      workflow_call:
+    permissions: read-all
+
+    name: R-CMD-check-versions
+
+    jobs:
+      R-CMD-check:
+        runs-on: ${{ matrix.os }}
+        name: ${{ matrix.os }} (R ${{ matrix.config.r }}, ${{ matrix.config.date }})
+        strategy:
+          fail-fast: false
+          matrix:
+            os:
+              - macos-latest
+              - windows-latest
+              - ubuntu-latest
+            config:
+              - date: 2023-10-25  # Lock the date of the CRAN snapshot
+                r: 4.3.1
+        env:
+          GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+          R_KEEP_PKG_SOURCE: yes
+
+        steps:
+          - uses: actions/checkout@v4
+          - uses: r-lib/actions/setup-pandoc@v2
+          - uses: r-lib/actions/setup-r@v2
+            with:
+              r-version: ${{ matrix.config.r }}
+              use-public-rspm: false
+
+          - name: Install curl
+            if: matrix.os == 'ubuntu-latest'
+            run: |
+              sudo apt install libcurl4-openssl-dev
+    
+          - name: Install dependencies
+            run: >
+              options(
+                repos = c(CRAN = "https://packagemanager.posit.co/cran/${{ matrix.config.date }}")
+                )
+    
+
+              install.packages(c("attachment", "rcmdcheck"), Ncpus = parallel::detectCores()-1)
+
+
+              attachment::att_from_description(field = c("Depends", "Imports", "Suggests")) |>
+                install.packages(Ncpus = parallel::detectCores()-1)
+
+            shell: Rscript {0}
+
+          - name: Session info
+            run: |
+              sessionInfo()
+              installed.packages()[,c("Package", "Version")]
+    
+            shell: Rscript {0}
+
+          - uses: r-lib/actions/check-r-package@v2
+            with:
+              args: 'c("--no-manual", "--as-cran")'
+              upload-snapshots: true
+              error-on: '"error"'
+              check-dir: '"check"'
+              upload-results: true