Install ImageMagick and oxipng in GitHub workflows

Author: ile-24556

.github/workflows/ci.yml

@@ -24,6 +24,8 @@ jobs:
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
+      - run: scripts/install_imagemagick_and_oxipng.sh
+
       - name: Restore npm cache if possible
         uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
         with:

.github/workflows/release.yaml

@@ -31,18 +31,7 @@ jobs:
             exit 1
           fi
 
-      - name: Install ImageMagick
-        run: |
-          sudo apt install --update -y imagemagick
-      - name: Install oxipng
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          cd "$(mktemp -d)"
-          gh release download -R oxipng/oxipng -p 'oxipng-*.*.*-x86_64-unknown-linux-gnu.tar.gz'
-          tar -xf oxipng-*.*.*-x86_64-unknown-linux-gnu.tar.gz --strip-components 1
-          mkdir -p ~/.local/bin
-          mv oxipng ~/.local/bin
+      - run: scripts/install_imagemagick_and_oxipng.sh
 
       - name: Restore npm cache if possible
         uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4

scripts/install_imagemagick_and_oxipng.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+if ! command -v convert; then
+  sudo apt install --update -y imagemagick
+fi
+
+if ! command -v oxipng; then
+  cd "$(mktemp -d)"
+  gh release download -R oxipng/oxipng -p 'oxipng-*.*.*-x86_64-unknown-linux-gnu.tar.gz'
+  tar -xf oxipng-*.*.*-x86_64-unknown-linux-gnu.tar.gz --strip-components 1
+  mkdir -p ~/.local/bin
+  mv oxipng ~/.local/bin
+fi