Upgrade to node.js 26.

.github/workflows/release.yml

@@ -26,12 +26,11 @@ jobs:
           settings: '${{ github.repository }}'
           target: ci/noop
 
-      - name: Install Ruby 3.4
-        uses: ruby/setup-ruby@v1
+      - name: Install the correct Node.js version
+        uses: actions/setup-node@v6
         with:
-          ruby-version: 3.4
-          bundler-cache: true
-          rubygems: '3.6.9'
+          node-version: 25
+          cache: 'npm'
 
       - name: Switch to SSH remotes for the Git repository
         run: git-ssh-remotes

.github/workflows/test.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        nodejs: [24, 25]
+        nodejs: [25, 26]
     steps:
       - name: Prepare the environment
         uses: hausgold/actions/ci@v2
@@ -29,7 +29,8 @@ jobs:
           target: ci/noop
 
       - name: Install system dependencies
-        run: sudo apt-get update && sudo apt-get install -y poppler-utils
+        run: sudo apt-get update && sudo apt-get install -y
+          poppler-utils imagemagick ghostscript
 
       - name: Install the correct Node.js version
         uses: actions/setup-node@v6
@@ -43,6 +44,14 @@ jobs:
       - name: Run the npm package tests
         run: make test
 
+      - name: Upload the archive with debugging information
+        uses: actions/upload-artifact@v7
+        if: failure()
+        with:
+          name: 'pdfgen-${{ github.sha }}'
+          path: test/tmp
+          retention-days: 7
+
       - name: Generate statistics
         run: fe-stats
 

CHANGELOG.md

@@ -1,6 +1,7 @@
 ### next
 
-* TODO: Replace this bullet point with an actual description of a change.
+* Upgraded to node.js >=25 (#31)
+* Upgraded to puppeteer >=25 (#31)
 
 ### 1.7.1 (5 May 2026)
 

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:24
+FROM node:25
 LABEL org.opencontainers.image.authors="containers@hausgold.de"
 
 # Install system packages

README.md

@@ -39,7 +39,7 @@ which are supported by
 
 ## Requirements
 
-* [Node.js](https://nodejs.org) (>=24)
+* [Node.js](https://nodejs.org) (>=25)
 * [GNU Make (development)](https://www.gnu.org/software/make/) (>=4.2.1)
 
 ## Getting started

exe/imgdiff

@@ -10,9 +10,38 @@ if [ -z "${2}" ]; then
   exit 1
 fi
 
-DIFF=$(compare -metric rmse "${1}" "${2}" /dev/null 2>&1 \
-  | cut -d '(' -f2 \
-  | tr -d ')')
+ACTUAL="${1}"
+EXPECTED="${2}"
+DIFF_OUT="${3}"
+
+if [ -n "${DIFF_OUT}" ]; then
+  # When a debug diff image path is given, emit a side-by-side composite
+  # of the actual, expected, and a red-highlighted pixel diff. The compare
+  # command exits non-zero whenever the images differ, hence the trailing
+  # `|| true` to keep the script flowing while still capturing the metric.
+  TMP=$(mktemp -d)
+  HIGHLIGHT="${TMP}/highlight.png"
+
+  DIFF=$(compare -metric rmse "${ACTUAL}" "${EXPECTED}" "${HIGHLIGHT}" 2>&1 \
+    | cut -d '(' -f2 \
+    | tr -d ')')
+
+  montage \
+    -label 'actual'   "${ACTUAL}" \
+    -label 'expected' "${EXPECTED}" \
+    -label 'diff'     "${HIGHLIGHT}" \
+    -tile 3x1 \
+    -geometry '+8+8' \
+    -background '#222222' \
+    -fill '#ffffff' \
+    "${DIFF_OUT}" >/dev/null 2>&1
+
+  rm -rf "${TMP}"
+else
+  DIFF=$(compare -metric rmse "${ACTUAL}" "${EXPECTED}" /dev/null 2>&1 \
+    | cut -d '(' -f2 \
+    | tr -d ')')
+fi
 
 DIFF=$(perl -e "print ${DIFF} * 100")