From a0b0fa3537c6a40c38c244b4d58dc5e3b4a5a8ac Mon Sep 17 00:00:00 2001
From: Pouyan Jahangiri <jahangiri.pouyan@gmail.com>
Date: Fri, 17 Jul 2026 17:06:03 -0700
Subject: [PATCH] Fix R-CMD-check workflow failing on deprecated actions and
 retired runner

GitHub now automatically fails any job using actions/cache < v3 latest or
upload-artifact v2, and the ubuntu-20.04 hosted runner has been retired,
so every R-CMD-check run currently fails during setup before R starts.

- actions/cache v3.3.1 -> v4
- actions/upload-artifact v2 -> v4 (artifact names are already unique per job)
- ubuntu-20.04 runner -> ubuntu-22.04, with matching RSPM repo (focal -> jammy)
  and remotes::system_requirements lookup
---
 .github/workflows/R_CMD_check.yaml | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/R_CMD_check.yaml b/.github/workflows/R_CMD_check.yaml
index 47735116..add3866e 100644
--- a/.github/workflows/R_CMD_check.yaml
+++ b/.github/workflows/R_CMD_check.yaml
@@ -25,7 +25,7 @@ jobs:
       matrix:
         config:
           - {os: macOS-latest, r: 'release'}
-          - {os: ubuntu-20.04, r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
+          - {os: ubuntu-22.04, r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/jammy/latest"}
           - {os: windows-latest, r: 'release'}  # Does not appear to have Java 32-bit, hence the --no-multiarch
 
     env:
@@ -67,7 +67,7 @@ jobs:
 
       - name: Cache R packages
         if: runner.os != 'Windows'
-        uses: actions/cache@v3.3.1
+        uses: actions/cache@v4
         with:
           path: ${{ env.R_LIBS_USER }}
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
@@ -79,7 +79,7 @@ jobs:
           while read -r cmd
           do
             eval sudo $cmd
-          done < <(Rscript -e 'writeLines(remotes::system_requirements("ubuntu", "20.04"))')
+          done < <(Rscript -e 'writeLines(remotes::system_requirements("ubuntu", "22.04"))')
 
       - name: Install libssh
         if: runner.os == 'Linux'
@@ -111,14 +111,14 @@ jobs:
 
       - name: Upload check results
         if: failure()
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ runner.os }}-r${{ matrix.config.r }}-results
           path: check
 
       - name: Upload source package
         if: success() && runner.os == 'macOS' && github.event_name != 'pull_request' && github.ref == 'refs/heads/master'
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: package_tarball
           path: check/*.tar.gz