CI Linux: simplify caches

handle cache build/install (transitively) in prepare.sh

Author: MartinPulec

.github/scripts/Linux/install_ffmpeg.sh

@@ -124,4 +124,9 @@ install_cached() {
         sudo ldconfig
 }
 
-"${1?action required!}"
+deps
+if [ -d $cache_dir ]; then
+        install_cached
+else
+        build_install
+fi

.github/scripts/Linux/install_others.sh

@@ -66,6 +66,7 @@ install_rav1e() {(
 
 # FFmpeg master needs at least v1.3.277 as for 6th Mar '25
 install_vulkan() {(
+        sudo apt build-dep libvulkan1
         git clone --depth 1 https://github.com/KhronosGroup/Vulkan-Headers
         mkdir Vulkan-Headers/build
         cd Vulkan-Headers/build

.github/scripts/Linux/install_sdl.sh

@@ -46,4 +46,9 @@ install_cached() {
         sudo cmake --install fluidsynth/build
 }
 
-"${1?action required!}"
+deps
+if [ -d $cache_dir ]; then
+        install_cached
+else
+        build_install
+fi

.github/scripts/Linux/prepare.sh

@@ -35,9 +35,6 @@ sudo apt install libopencv-core-dev libopencv-imgproc-dev
 sudo apt install libcurl4-openssl-dev # for RTSP client (vidcap)
 sudo apt install i965-va-driver-shaders libva-dev # instead of i965-va-driver
 
-"$dir/install_sdl.sh" deps
-"$dir/install_ffmpeg.sh" deps
-
 sudo apt install qt6-base-dev qt6-wayland
 . /etc/os-release # source ID and VERSION_ID
 if [ "$ID" = ubuntu ] && [ "$VERSION_ID" = 22.04 ]; then
@@ -53,3 +50,6 @@ qt6.conf" "/usr/lib/$(uname -m)-linux-gnu/qt-default/qtchooser/default.conf"
 
 "$GITHUB_WORKSPACE/.github/scripts/Linux/install_others.sh"
 
+"$dir"/install_sdl.sh
+"$dir"/install_ffmpeg.sh
+

.github/scripts/install-common-deps.sh

@@ -49,6 +49,9 @@ download_build_aja() {
 }
 
 install_aja() {(
+        if [ "$(uname -s)" = Linux ]; then
+                sudo apt install libudev-dev
+        fi
         if [ ! -d libajantv2 ]; then
                 download_build_aja
         fi

.github/workflows/ccpp.yml

@@ -75,34 +75,20 @@ jobs:
       if: steps.cache-ndi.outputs.cache-hit != 'true'
       run: "curl -Lf https://downloads.ndi.tv/SDK/NDI_SDK_Linux/\
        Install_NDI_SDK_v6_Linux.tar.gz -o /var/tmp/Install_NDI_SDK_Linux.tar.gz"
-    - name: bootstrap
-      run: |
-           . .github/scripts/environment.sh
-           .github/scripts/Linux/prepare.sh
-    - name: Run actions/cache for FFmpeg
-      id: cache-ffmpeg
+    - name: Cache FFmpeg
       uses: actions/cache@main
       with:
         path: '/var/tmp/ffmpeg'
-        key: cache-ffmpeg-${{ runner.os }}-${{ hashFiles( '.github/scripts/Linux/install_ffmpeg.sh', '.github/scripts/Linux/ffmpeg-patches/*') }}
-    - name: Build FFmpeg
-      if: steps.cache-ffmpeg.outputs.cache-hit != 'true'
-      run: .github/scripts/Linux/install_ffmpeg.sh build_install
-    - name: Install Cached FFmpeg
-      if: steps.cache-ffmpeg.outputs.cache-hit == 'true'
-      run: .github/scripts/Linux/install_ffmpeg.sh install_cached
+        key: cache-ffmpeg-${{ runner.os }}-${{ hashFiles( '.github/scripts/Linux/install_ffmpeg.sh', '.github/scripts/Linux/install_other.sh', '.github/scripts/Linux/ffmpeg-patches/*') }}
     - name: Cache SDL
-      id: cache-sdl
       uses: actions/cache@main
       with:
         path: '/var/tmp/sdl'
         key: cache-sdl-${{ runner.os }}-${{ hashFiles( '.github/scripts/Linux/install_sdl.sh' ) }}
-    - name: Build SDL
-      if: steps.cache-sdl.outputs.cache-hit != 'true'
-      run: .github/scripts/Linux/install_sdl.sh build_install
-    - name: Install Cached SDL
-      if: steps.cache-sdl.outputs.cache-hit == 'true'
-      run: .github/scripts/Linux/install_sdl.sh install_cached
+    - name: bootstrap
+      run: |
+           . .github/scripts/environment.sh
+           .github/scripts/Linux/prepare.sh
     - name: configure
       run: "./autogen.sh $FEATURES || { RC=$?; cat config.log; exit $RC; }"
     - name: make