GHA: Check plan(cluster, workers = parallelly::makeClusterSequential())

Author: HenrikBengtsson

.github/workflows/future_tests-future.yaml

@@ -20,6 +20,7 @@ jobs:
           - { plan: 'multicore'    }
           - { plan: 'multisession' }
           - { plan: 'sequential'   }
+          - { plan: 'plan(cluster, workers = parallelly::makeClusterSequential())' }
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
@@ -66,6 +67,12 @@ jobs:
           plan <- "${{ matrix.future.plan }}"
           pattern <- ".*(future[.][[:alnum:]]+)::[[:alnum:]]+.*"
           if (grepl(pattern, plan) && nzchar(pkg <- sub(pattern, "\\1", plan))) install.packages(pkg)
+          ## Special case
+          if (grepl("makeClusterSequential", plan)) {
+            if (packageVersion("future") < "1.68.0-9036") {
+              remotes::install_github("futureverse/future", ref = "develop")
+            }
+          }
         shell: Rscript {0}
 
       - name: Session info