preinstall zlib for standalone contrib builds

Author: Vollstrecker

.github/workflows/contribs.yml

@@ -16,31 +16,43 @@ jobs:
           - name: Ubuntu ADA
             os: ubuntu-latest
             src_dir: contrib/ada
+            install_zlib: yes
 
           - name: Ubuntu BLAST
             os: ubuntu-latest
             src_dir: contrib/blast
+            install_zlib: yes
 
           - name: Ubuntu IOSTREAM
             os: ubuntu-latest
             src_dir: contrib/iostream3
+            install_zlib: yes
 
           - name: Ubuntu MINIZIP
             os: ubuntu-latest
             src_dir: contrib/minizip
+            install_zlib: yes
 
           - name: Ubuntu PUFF
             os: ubuntu-latest
             src_dir: contrib/puff
+            install_zlib: yes
 
     steps:
     - name: Checkout repository
       uses: actions/checkout@v4
 
-    - name: Install packages (Linux)
+    - name: Install packages
       run: |
         sudo apt install gnat libbz2-dev
 
+    - name: Install zlib
+      if: ${{ matrix.install_zlib }} == 'yes'
+      run: |
+      cmake -S . -B ../build-zlib -DCMAKE_BUILD_TYPE=Release
+      cmake --build ../build-zlib --config Release
+      cmake --install ../build-zlib
+
     - name: Generate project files
       run: cmake -S ${{ matrix.src_dir }} -B ../build ${{ matrix.cmake-args }} -DCMAKE_BUILD_TYPE=Release