check on release OS only, on PR only (#28)

* check on release OS only, on PR only

* correcting stupidness

.github/workflows/R-CMD-check.yaml

@@ -1,8 +1,6 @@
 # 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:
-    branches: [main, master]
   pull_request:
     branches: [main, master]
 
@@ -22,17 +20,14 @@ jobs:
         config:
           - {os: macos-latest,   r: 'release'}
           - {os: windows-latest, r: 'release'}
-          - {os: ubuntu-latest,   r: 'devel', http-user-agent: 'release'}
           - {os: ubuntu-latest,   r: 'release'}
-          - {os: ubuntu-latest,   r: 'oldrel-1'}
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
       R_KEEP_PKG_SOURCE: yes
 
     steps:
       - uses: actions/checkout@v4
-
       - uses: r-lib/actions/setup-pandoc@v2
 
       - uses: r-lib/actions/setup-r@v2
@@ -48,5 +43,7 @@ jobs:
 
       - uses: r-lib/actions/check-r-package@v2
         with:
+          args: 'c("--no-manual", "--as-cran", "--no-vignettes", "--no-build-vignettes")'
           upload-snapshots: true
-          build_args: 'c("--no-manual","--no-build-vignettes","--ignore-vignettes")'
+          build_args: 'c("--no-manual","--no-build-vignettes")'
+          error-on: '"error"'