ci: cache native build outputs and merge per-platform artifacts

The native binaries are a pure function of the src/main/native sources, yet
every workflow invocation recompiled all of them from scratch: each PR push
triggered three parallel full rebuilds (pre-merge + test-graalvm +
test-packaging), and a release tag four more.

build-natives.yaml now caches each platform's output tree keyed on
hashFiles('**/src/main/native/**') plus the workflow itself; on a hit every
toolchain/compile step is skipped and the job only verifies and re-publishes.
Per-module verify/upload steps are collapsed into one verify step and one
merged artifact per platform (natives-windows, natives-macos,
natives-linux-{x64,aarch64}), so the ~25 copy-pasted download steps in each
of the 7 consumer jobs become a single 'pattern: natives-*' download.

pre-merge.yaml also gains a concurrency group cancelling superseded PR runs
(pushes to main are never cancelled: their run saves the shared caches).

Author: kdroidFilter

.github/workflows/build-natives.yaml

@@ -10,6 +10,12 @@ on:
       # trigger too — the single-star glob does not cross path separators.
       - '**'
 
+# Supersede in-flight runs on PR pushes; pushes to main are never cancelled
+# (their run saves the caches every other workflow keys off).
+concurrency:
+  group: pre-merge-${{ github.head_ref || github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 jobs:
   build-natives:
     uses: ./.github/workflows/build-natives.yaml
@@ -24,179 +30,10 @@ jobs:
       - name: Checkout Repo
         uses: actions/checkout@v4
 
-      - name: Download darkmode-detector native artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: darkmode-detector/src/main/resources/nucleus/native/
-          pattern: '*-natives*'
-          merge-multiple: true
-
-      - name: Download native-ssl artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: native-ssl/src/main/resources/nucleus/native/
-          pattern: 'ssl-*'
-          merge-multiple: true
-
-      - name: Download decorated-window-jbr artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: decorated-window-jbr/src/main/resources/nucleus/native/
-          pattern: 'decorated-window-jbr-*'
-          merge-multiple: true
-
-      - name: Download decorated-window-jni artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: decorated-window-jni/src/main/resources/nucleus/native/
-          pattern: 'decorated-window-jni-*'
-          merge-multiple: true
-
-      - name: Download decorated-window-core artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: decorated-window-core/src/main/resources/nucleus/native/
-          pattern: 'decorated-window-core-*'
-          merge-multiple: true
-
-      - name: Download linux-hidpi artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: linux-hidpi/src/main/resources/nucleus/native/
-          pattern: 'linux-hidpi-*'
-          merge-multiple: true
-
-      - name: Download system-color artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: system-color/src/main/resources/nucleus/native/
-          pattern: 'system-color-*'
-          merge-multiple: true
-
-      - name: Download energy-manager artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: energy-manager/src/main/resources/nucleus/native/
-          pattern: 'energy-manager-*'
-          merge-multiple: true
-
-      - name: Download taskbar-progress artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: taskbar-progress/src/main/resources/nucleus/native/
-          pattern: 'taskbar-progress-*'
-          merge-multiple: true
-
-      - name: Download fs-watcher artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: fs-watcher/src/main/resources/nucleus/native/
-          pattern: 'fs-watcher-*'
-          merge-multiple: true
-
-      - name: Download notification-macos artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: notification-macos/src/main/resources/nucleus/native/
-          pattern: 'notification-macos*'
-          merge-multiple: true
-
-      - name: Download service-management-macos artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: service-management-macos/src/main/resources/nucleus/native/
-          pattern: 'service-management-macos*'
-          merge-multiple: true
-
-      - name: Download notification-linux artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: notification-linux/src/main/resources/nucleus/native/
-          pattern: 'notification-linux-*'
-          merge-multiple: true
-
-      - name: Download notification-windows artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: notification-windows/src/main/resources/nucleus/native/
-          pattern: 'notification-windows*'
-          merge-multiple: true
-
-      - name: Download autolaunch artifacts
+      - name: Download native artifacts
         uses: actions/download-artifact@v4
         with:
-          path: autolaunch/src/main/resources/nucleus/native/
-          pattern: 'autolaunch*'
-          merge-multiple: true
-
-      - name: Download launcher-windows artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: launcher-windows/src/main/resources/nucleus/native/
-          pattern: 'launcher-windows*'
-          merge-multiple: true
-
-      - name: Download launcher-linux artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: launcher-linux/src/main/resources/nucleus/native/
-          pattern: 'launcher-linux-*'
-          merge-multiple: true
-
-      - name: Download launcher-macos artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: launcher-macos/src/main/resources/nucleus/native/
-          pattern: 'launcher-macos*'
-          merge-multiple: true
-
-      - name: Download global-hotkey artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: global-hotkey/src/main/resources/nucleus/native/
-          pattern: 'global-hotkey-*'
-          merge-multiple: true
-
-      - name: Download menu-macos artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: menu-macos/src/main/resources/nucleus/native/
-          pattern: 'menu-macos*'
-          merge-multiple: true
-
-      - name: Download system-info artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: system-info/src/main/resources/nucleus/native/
-          pattern: 'system-info-*'
-          merge-multiple: true
-
-      - name: Download scheduler artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: scheduler/src/main/resources/nucleus/native/
-          pattern: 'scheduler-*'
-          merge-multiple: true
-
-      - name: Download media-control artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: media-control/src/main/resources/nucleus/native/
-          pattern: 'media-control-*'
-          merge-multiple: true
-
-      - name: Download decorated-window-tao artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: decorated-window-tao/src/main/resources/nucleus/native/
-          pattern: 'decorated-window-tao-*'
-          merge-multiple: true
-
-      - name: Download graalvm-runtime artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: graalvm-runtime/src/main/resources/nucleus/native/
-          pattern: 'graalvm-runtime-*'
+          pattern: 'natives-*'
           merge-multiple: true
 
       - name: Verify all natives present
@@ -371,11 +208,10 @@ jobs:
       - name: Checkout Repo
         uses: actions/checkout@v4
 
-      - name: Download decorated-window-tao artifacts
+      - name: Download native artifacts
         uses: actions/download-artifact@v4
         with:
-          path: decorated-window-tao/src/main/resources/nucleus/native/
-          pattern: 'decorated-window-tao-*'
+          pattern: 'natives-*'
           merge-multiple: true
 
       - name: Set up JDK 21
@@ -405,11 +241,10 @@ jobs:
       - name: Checkout Repo
         uses: actions/checkout@v4
 
-      - name: Download decorated-window-tao artifacts
+      - name: Download native artifacts
         uses: actions/download-artifact@v4
         with:
-          path: decorated-window-tao/src/main/resources/nucleus/native/
-          pattern: 'decorated-window-tao-*'
+          pattern: 'natives-*'
           merge-multiple: true
 
       - name: Set up JDK 21
@@ -481,42 +316,10 @@ jobs:
       - name: Checkout Repo
         uses: actions/checkout@v4
 
-      - name: Download decorated-window-tao artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: decorated-window-tao/src/main/resources/nucleus/native/
-          pattern: 'decorated-window-tao-*'
-          merge-multiple: true
-
-      # tao-demo's build graph pulls these modules' native-build tasks in too;
-      # providing the prebuilt artifacts keeps CI from compiling them (the
-      # runner lacks the X11 dev headers decorated-window-jni needs).
-      - name: Download decorated-window-jni artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: decorated-window-jni/src/main/resources/nucleus/native/
-          pattern: 'decorated-window-jni-*'
-          merge-multiple: true
-
-      - name: Download decorated-window-core artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: decorated-window-core/src/main/resources/nucleus/native/
-          pattern: 'decorated-window-core-*'
-          merge-multiple: true
-
-      - name: Download linux-hidpi artifacts
-        uses: actions/download-artifact@v4
-        with:
-          path: linux-hidpi/src/main/resources/nucleus/native/
-          pattern: 'linux-hidpi-*'
-          merge-multiple: true
-
-      - name: Download graalvm-runtime artifacts
+      - name: Download native artifacts
         uses: actions/download-artifact@v4
         with:
-          path: graalvm-runtime/src/main/resources/nucleus/native/
-          pattern: 'graalvm-runtime-*'
+          pattern: 'natives-*'
           merge-multiple: true
 
       - name: Set up JDK 21