Require ggplot2 >= 3.5.2 and test it in CI

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

@@ -26,13 +26,20 @@ jobs:
       fail-fast: false
       matrix:
         # devel only on schedule + manual dispatch; push/PR get stable only
-        ggplot2: ${{ fromJSON((github.event_name == 'schedule' || github.event_name == 'workflow_dispatch') && '[">= 3.5.2", "devel"]' || '[">= 3.5.2"]') }}
+        ggplot2: ${{ fromJSON((github.event_name == 'schedule' || github.event_name == 'workflow_dispatch') && '["release", "devel"]' || '["release"]') }}
         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'}
+        # minimum supported ggplot2 version (see DESCRIPTION)
+        include:
+          - ggplot2: '3.5.2'
+            config: {os: ubuntu-latest, r: 'release'}
+            # current versions of some suggested packages used in the
+            # vignettes (e.g., ggtree, ggpattern) require ggplot2 >= 4.0.0
+            skip_vignettes: true
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
@@ -59,12 +66,13 @@ jobs:
           extra-packages: any::rcmdcheck
           needs: check
 
+      # the release version is already installed by setup-r-dependencies
       - name: Install ggplot2 ${{ matrix.ggplot2 }}
         run: |
           install.packages("remotes")
           remotes::install_version("ggplot2", version = "${{ matrix.ggplot2 }}")
         shell: Rscript {0}
-        if: matrix.ggplot2 != 'devel'
+        if: matrix.ggplot2 != 'devel' && matrix.ggplot2 != 'release'
 
       - name: Install development ggplot2
         run: |
@@ -79,4 +87,8 @@ jobs:
           _R_CHECK_FORCE_SUGGESTS_: 0
         with:
           upload-snapshots: true
-          build_args: 'c("--no-manual","--compact-vignettes=gs+qpdf")'
+          build_args: ${{ matrix.skip_vignettes && 'c("--no-manual","--no-build-vignettes")' || 'c("--no-manual","--compact-vignettes=gs+qpdf")' }}
+          args: ${{ matrix.skip_vignettes && 'c("--no-manual","--as-cran","--ignore-vignettes")' || 'c("--no-manual","--as-cran")' }}
+          # without vignettes, and with docs inherited from newer ggplot2
+          # versions, only errors are meaningful for the minimum version job
+          error-on: ${{ matrix.skip_vignettes && '"error"' || '"warning"' }}

DESCRIPTION

@@ -20,7 +20,7 @@ LazyData: true
 biocViews:
 Imports:
     deeptimedata,
-    ggplot2 (>= 3.5.0),
+    ggplot2 (>= 3.5.2),
     utils,
     ggforce,
     grid,

NEWS.md

@@ -1,5 +1,7 @@
 # deeptime (development version)
 
+__deeptime now requires ggplot2 version 3.5.2 or higher__, matching the requirement of its ggh4x dependency.
+
 # deeptime 2.4.0
 
 __deeptime now requires R version 4.1 or higher__.

tests/testthat/test-guides.R

@@ -180,6 +180,7 @@ test_that("ggtree scale works with only fossil taxa", {
 })
 
 test_that("guide_geo works with coord_geo_radial", {
+  skip_if_not_installed("ggtree")
   skip_if_not_installed("ape")
   gg <- revts(ggtree(tree)) +
     coord_geo_radial(dat = "epochs", end = 1.49 * pi,
@@ -196,6 +197,7 @@ test_that("guide_geo works with coord_geo_radial", {
 })
 
 test_that("ggtree scale works with only fossil taxa", {
+  skip_if_not_installed("ggtree")
   skip_if_not_installed("paleotree")
   gg <- ggtree(ceratopsianTreeRaia,
                position = position_nudge(x = -ceratopsianTreeRaia$root.time)) +