Band aid for fixing regression in rmarkdown for oldrel-4

Author: krlmlr

.github/workflows/pkgdown-build/action.yml

@@ -3,6 +3,13 @@ name: 'Action to build a pkgdown website'
 runs:
   using: "composite"
   steps:
+    - name: "Band aid: install rmarkdown from GitHub in older R"
+      run: |
+        if (getRversion() < "3.5" && packageVersion("rmarkdown") < "2.13") {
+          pak::pak("rstudio/rmarkdown")
+        }
+      shell: Rscript {0}
+
     - name: Build site
       run: |
         pkgdown::build_site()

.github/workflows/pkgdown-deploy/action.yml

@@ -3,6 +3,13 @@ name: 'Action to deploy a pkgdown website'
 runs:
   using: "composite"
   steps:
+    - name: "Band aid: install rmarkdown from GitHub in older R"
+      run: |
+        if (getRversion() < "3.5" && packageVersion("rmarkdown") < "2.13") {
+          pak::pak("rstudio/rmarkdown")
+        }
+      shell: Rscript {0}
+
     - name: Deploy site
       run: |
         pkgdown::deploy_to_branch(new_process = FALSE)