add action to auto-render readme and readme install instructions update

.github/workflows/render-README.yaml

@@ -0,0 +1,39 @@
+# Workflow derived from https://github.com/r-lib/actions/tree/master/examples
+# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
+on:
+  push:
+    paths: ['README.Rmd']
+  workflow_dispatch:
+    paths: ['README.Rmd']
+
+
+name: Render README
+
+jobs:
+  render-rmarkdown:
+    runs-on: ubuntu-latest
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - uses: r-lib/actions/setup-pandoc@v2
+
+      - uses: r-lib/actions/setup-r@v2
+
+      - uses: r-lib/actions/setup-renv@v2
+
+      - name: Render README.Rmd
+        run: |
+          Rscript -e 'rmarkdown::render("README.Rmd")'
+
+      - name: Commit results
+        run: |
+          git config --local user.name "$GITHUB_ACTOR"
+          git config --local user.email "$GITHUB_ACTOR@users.noreply.github.com"
+          git add README.md
+          git commit -m 'Re-build README.Rmd' || echo "No changes to commit"
+          git push origin || echo "No changes to commit"

README.Rmd

@@ -50,7 +50,7 @@ glue::glue('<script type="application/ld+json">
 Install latest release from **R-multiverse**:
 
 ```r
-install.packages('rJavaEnv', repos = c('https://community.r-multiverse.org', 'https://cloud.r-project.org'))
+install.packages('rJavaEnv', repos = 'https://community.r-multiverse.org')
 ```
 
 You can install the development version of `rJavaEnv` from GitHub: