ci: build lkm only if needed while building manager

.github/workflows/build-lkm.yml

@@ -1,17 +1,23 @@
 name: Build LKM for KernelSU
 on:
-  push:
-    branches: ["main", "ci", "checkci"]
-    paths:
-      - ".github/workflows/build-lkm.yml"
-      - 'kernel/**'
-  pull_request:
-    branches: ["main"]
-    paths:
-      - ".github/workflows/build-lkm.yml"
-      - 'kernel/**'
   workflow_call:
+    inputs:
+      upload:
+        required: false
+        type: boolean
+        default: false
+        description: "Whether to upload to branch"
+    secrets:
+      # username:github_pat
+      TOKEN:
+        required: true
   workflow_dispatch:
+    inputs:
+      upload:
+        required: false
+        type: boolean
+        default: false
+        description: "Whether to upload to branch"
 jobs:
   build-lkm:
     strategy:
@@ -35,6 +41,7 @@ jobs:
           - version: "android15-6.6"
             sub_level: 57
             os_patch_level: 2024-12
+    # uses: ./.github/workflows/gki-kernel-mock.yml when debugging
     uses: ./.github/workflows/gki-kernel.yml
     with:
       version: ${{ matrix.version }}
@@ -43,10 +50,10 @@ jobs:
       os_patch_level: ${{ matrix.os_patch_level }}
       build_lkm: true
 
-  
   push-to-branch:
     needs: [build-lkm]
     runs-on: ubuntu-latest
+    if: ${{ inputs.upload }}
     steps:
       - name: Download all workflow run artifacts
         uses: actions/download-artifact@v4
@@ -58,10 +65,10 @@ jobs:
           cd bin
           git config --global init.defaultBranch lkm
           git init
-          git remote add origin https://${{ github.actor }}:${{ secrets.TOKEN }}@github.com/${{ github.repository }}
+          git remote add origin https://${{ secrets.TOKEN }}@github.com/${{ github.repository }}
           git config --local user.name "github-actions[bot]"
           git config --local user.email "41898282+github-actions[bot]@users.noreply.github.com"
           find . -type f
           git add .
-          git commit -m "Upload LKM"
+          git commit -m "Upload LKM from ${{ github.sha }}" -m "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}"
           git push --force --set-upstream origin lkm

.github/workflows/build-manager.yml

@@ -12,9 +12,79 @@ on:
     paths:
       - 'manager/**'
   workflow_call:
+  workflow_dispatch:
+    inputs:
+      build_lkm:
+        required: true
+        type: choice
+        default: "auto"
+        options:
+          - "true"
+          - "false"
+          - "auto"
+        description: "Whether to build lkm"
+      upload_lkm:
+        required: true
+        type: boolean
+        default: false
+        description: "Whether to upload lkm"
 
 jobs:
+  check-build-lkm:
+    runs-on: ubuntu-latest
+    outputs:
+      build_lkm: ${{ steps.check-build.outputs.build_lkm }}
+      upload_lkm: ${{ steps.check-build.outputs.upload_lkm }}
+    steps:
+      - name: check build
+        id: check-build
+        run: |
+          if [ "${{ github.event_name }}" == "workflow_dispatch" ] && [ "${{ inputs.build_lkm }}" != "auto" ]; then
+            kernel_changed="${{ inputs.build_lkm }}"
+          else
+            kernel_changed=true
+            mkdir tmp
+            cd tmp
+            git config --global init.defaultBranch bot
+            git config --global user.name 'Bot'
+            git config --global user.email 'bot@github.5ec1cff.io'
+            git init .
+            git remote add origin https://github.com/${{ github.repository }}
+            CURRENT_COMMIT="${{ github.event.head_commit.id }}"
+            git fetch origin $CURRENT_COMMIT --depth=1
+            git fetch origin lkm --depth=1
+            LKM_COMMIT="$(git log --format=%B -n 1 origin/lkm | head -n 1)"
+            LKM_COMMIT="${LKM_COMMIT#Upload LKM from }"
+            LKM_COMMIT=$(echo "$LKM_COMMIT" | tr -d '[:space:]')
+            echo "LKM_COMMIT=$LKM_COMMIT"
+            git fetch origin "$LKM_COMMIT" --depth=1
+            git diff --quiet "$LKM_COMMIT" "$CURRENT_COMMIT" -- kernel :!kernel/setup.sh .github/workflows/build-lkm.yml .github/workflows/build-kernel-*.yml && kernel_changed=false
+            cd ..
+            rm -rf tmp
+          fi
+          if [ "${{ github.event_name }}" == "push" ] && [ "${{ github.ref }}" == 'refs/heads/main' ]; then
+            need_upload=true
+          elif [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
+            need_upload="${{ inputs.upload_lkm }}"
+          else
+            need_upload=false
+          fi
+          echo "kernel changed: $kernel_changed"
+          echo "need upload: $need_upload"
+          echo "build_lkm=$kernel_changed" >> "$GITHUB_OUTPUT"
+          echo "upload_lkm=$need_upload" >> "$GITHUB_OUTPUT"
+
+  build-lkm:
+    needs: check-build-lkm
+    uses: ./.github/workflows/build-lkm.yml
+    if: ${{ needs.check-build-lkm.outputs.build_lkm == 'true' }}
+    with:
+      upload: ${{ needs.check-build-lkm.outputs.upload_lkm == 'true' }}
+    secrets: inherit
+
   build-ksud:
+    if: ${{ always() }}
+    needs: [ check-build-lkm, build-lkm ]
     strategy:
       matrix:
         include:
@@ -27,8 +97,10 @@ jobs:
       target: ${{ matrix.target }}
       os: ${{ matrix.os }}
       pack_lkm: true
+      pull_lkm: ${{ needs.check-build-lkm.outputs.build_lkm != 'true' }}
 
   build-manager:
+    if: ${{ always() }}
     needs: build-ksud
     runs-on: ubuntu-latest
     defaults:

.github/workflows/gki-kernel-mock.yml

@@ -0,0 +1,79 @@
+name: GKI Kernel Build
+
+on:
+  workflow_call:
+    inputs:
+      version:
+        required: true
+        type: string
+        description: >
+          Output directory of gki,
+          for example: android12-5.10
+      version_name:
+        required: true
+        type: string
+        description: >
+          With SUBLEVEL of kernel,
+          for example: android12-5.10.66
+      tag:
+        required: true
+        type: string
+        description: >
+          Part of branch name of common kernel manifest,
+          for example: android12-5.10-2021-11
+      os_patch_level:
+        required: false
+        type: string
+        description: >
+          Patch level of common kernel manifest,
+          for example: 2021-11
+        default: 2022-05
+      patch_path:
+        required: false
+        type: string
+        description: >
+          Directory name of .github/patches/<patch_path>
+          for example: 5.10
+      use_cache:
+        required: false
+        type: boolean
+        default: true
+      embed_ksud:
+        required: false
+        type: string
+        default: ksud-aarch64-linux-android
+        description: >
+          Artifact name of prebuilt ksud to be embedded
+          for example: ksud-aarch64-linux-android
+      debug:
+        required: false
+        type: boolean
+        default: false
+      build_lkm:
+        required: false
+        type: boolean
+        default: false
+    secrets:
+      BOOT_SIGN_KEY:
+        required: false
+      CHAT_ID:
+        required: false
+      BOT_TOKEN:
+        required: false
+      MESSAGE_THREAD_ID:
+        required: false
+
+jobs:
+  mock_build:
+    name: Mock build ${{ inputs.version_name }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Create mocking ko
+        run: |
+          echo "${{ inputs.version }}_kernelsu.ko" > ${{ inputs.version }}_kernelsu.ko
+      - name: Upload LKM
+        uses: actions/upload-artifact@v4
+        if: ${{ inputs.build_lkm == true }}
+        with:
+          name: ${{ inputs.version }}-lkm
+          path: ./*_kernelsu.ko

.github/workflows/ksud.yml

@@ -9,6 +9,10 @@ on:
         required: false
         type: string
         default: ubuntu-latest
+      pull_lkm:
+        required: false
+        type: boolean
+        default: true
       pack_lkm:
         required: false
         type: boolean
@@ -25,18 +29,27 @@ jobs:
       with:
         fetch-depth: 0
 
-    - name: Download Pre-built LKMs
+    - name: Pull lkms from branch
-      if: ${{ inputs.pack_lkm }}
+      if: ${{ inputs.pack_lkm && inputs.pull_lkm }}
       uses: actions/checkout@v4
       with:
         ref: lkm
         path: lkm
 
-    - name: Prepare LKM fies
+    - name: Download lkms from artifacts
-      if: ${{ inputs.pack_lkm }}
+      if: ${{ inputs.pack_lkm && !inputs.pull_lkm }}
+      uses: actions/download-artifact@v4
+
+    - name: Prepare LKM files
+      if: ${{ inputs.pack_lkm && inputs.pull_lkm }}
       run: |
         cp lkm/*_kernelsu.ko ./userspace/ksud/bin/aarch64/
 
+    - name: Prepare LKM files
+      if: ${{ inputs.pack_lkm && !inputs.pull_lkm }}
+      run: |
+        cp android*-lkm/*_kernelsu.ko ./userspace/ksud/bin/aarch64/
+
     - name: Setup rustup
       run: |
         rustup update stable