Adds render-rmarkdown github action

.github/workflows/render-rmarkdown.yaml

@@ -0,0 +1,33 @@
+# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
+# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
+on:
+  push:
+    paths: ['**.Rmd']
+
+name: render-rmarkdown
+
+jobs:
+  render-rmarkdown:
+    runs-on: ubuntu-latest
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: r-lib/actions/setup-pandoc@v2
+
+      - uses: r-lib/actions/setup-r@v2
+
+      - uses: r-lib/actions/setup-renv@v2
+
+      - name: Render Rmarkdown files and Commit Results
+        run: |
+          RMD_PATH=($(git diff --name-only ${{ github.event.before }} ${{ github.sha }} | grep '[.]Rmd$'))
+          Rscript -e 'for (f in commandArgs(TRUE)) if (file.exists(f)) rmarkdown::render(f)' ${RMD_PATH[*]}
+          git config --local user.name "$GITHUB_ACTOR"
+          git config --local user.email "$GITHUB_ACTOR@users.noreply.github.com"
+          git commit ${RMD_PATH[*]/.Rmd/.md} -m 'Re-build Rmarkdown files' || echo "No changes to commit"
+          git push origin || echo "No changes to commit"