Add workflow for updating kernel branch

This change adds a Github Actions workflow for updating a kernel branch
and creating a pull request with the change.

.github/workflows/update.yml

@@ -0,0 +1,71 @@
+name: Kernel Update
+
+on:
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Tag of the Linux Kernel to update to'
+        required: true
+      version:
+        description: 'Custom version number'
+        required: false
+      release:
+        description: 'Custom release number'
+        required: false
+
+jobs:
+  update:
+    name: Update
+    runs-on: [ubuntu-latest]
+    steps:
+    - name: Checkout Sources
+      uses: actions/checkout@v2
+      with:
+          submodules: recursive
+    - uses: tibdex/github-app-token@v1
+      id: generate-token
+      with:
+        app_id: ${{ secrets.APP_ID }}
+        private_key: ${{ secrets.APP_PRIVATE_KEY }}
+    - name: Setup System Dependencies
+      run: sudo apt install devscripts
+    - name: Update Kernel
+      id: update
+      run: |
+        TAG=${{ github.event.inputs.tag }}
+        VERSION=${{ github.event.inputs.version }}
+        RELEASE=${{ github.event.inputs.release }}
+        VERSION_OPT=${VERSION:+-v ${VERSION}}
+        RELEASE_OPT=${RELEASE:+-r ${RELEASE}}
+        ./scripts/update.sh -t ${{ github.event.inputs.tag }} $VERSION_OPT $RELEASE_OPT
+        echo "::set-output name=version::$(scripts/version.sh -L)"
+        echo "::set-output name=full::$(scripts/version.sh)"
+        changelog=$(dpkg-parsechangelog -c 1 -l debian/changelog)
+        changelog="${changelog//'%'/'%25'}"
+        changelog="${changelog//$'\n'/'%0A'}"
+        changelog="${changelog//$'\r'/'%0D'}"
+        echo "::set-output name=changelog::$changelog"
+        base=$(scripts/version.sh -B)
+        echo "::set-output name=base::$base"
+        echo "::set-output name=branch::${GITHUB_REF##*/}"
+    - name: Create Pull Request
+      uses: peter-evans/create-pull-request@v3
+      with:
+        token: ${{ steps.generate-token.outputs.token }} # Custom token needed to recursively trigger workflows
+        commit-message: |
+          Add Linux ${{ steps.update.outputs.version }}
+
+          This change updates the kernel to Linux ${{ steps.update.outputs.version }} based on Ubuntu ${{ steps.update.output.base }}.
+        branch: staging/v${{ steps.update.outputs.full }}
+        branch-suffix: short-commit-hash
+        delete-branch: true
+        title: "Add Linux ${{ steps.update.outputs.version }}"
+        body: |
+          Automated pull request to update the kernel to Linux ${{ steps.update.outputs.version }}.
+
+          **Changelog:**
+          ```
+          ${{ steps.update.outputs.changelog }}
+          ```
+        labels: |
+          release

scripts/update.sh

@@ -5,9 +5,9 @@ set -o pipefail
 
 LINUX_REPOSITORY=submodules/ubuntu-mainline
 
-while getopts "r:t:b:v:h" OPTION; do
+while getopts "R:t:b:v:r:h" OPTION; do
     case $OPTION in
-    r)
+    R)
         LINUX_REPOSITORY=$OPTARG
         ;;
     t)
@@ -19,13 +19,16 @@ while getopts "r:t:b:v:h" OPTION; do
     v)
         LINUX_VERSION=$OPTARG
         ;;
-
+    r)
+        LINUX_PACKAGE_RELEASE=$OPTARG
+        ;;
     h)
         echo "update.sh -rtbh"
-        echo "  -r  path to Linux Git repository"
+        echo "  -R  path to Linux Git repository"
         echo "  -t  tag in Linux Git repository to pick"
         echo "  -b  manual basis for this kernel"
         echo "  -v  manual version for this kernel"
+        echo "  -r  manual release version for this kernel"
         echo "  -h  this help message"
         exit 1
         ;;
@@ -66,7 +69,9 @@ LINUX_VERSION_PATCH=${LINUX_VERSION_PATCH:-0} # Default to 0
 LINUX_PACKAGE_RELEASE_PREVIOUS=$(scripts/version.sh -r)
 
 # Check whether we need to increment the package release
-if [[ $LINUX_VERSION == "$(scripts/version.sh -L)" ]]; then
+if [[ -n $LINUX_PACKAGE_RELEASE ]]; then
+    echo "Using custom package release $LINUX_PACKAGE_RELEASE"
+elif [[ $LINUX_VERSION == "$(scripts/version.sh -L)" ]]; then
     LINUX_PACKAGE_RELEASE=$((LINUX_PACKAGE_RELEASE_PREVIOUS + 1))
     echo "Incrementing package release to $LINUX_PACKAGE_RELEASE"
 else

scripts/version.sh

@@ -3,6 +3,7 @@
 set -e 
 set -o pipefail
 
+LINUX_REPOSITORY=submodules/ubuntu-mainline
 LINUX_VERSION_MAJOR=$(sed -n "s/^KERNEL_MAJ=\([0-9]*$\)/\1/p" < Makefile | xargs)
 LINUX_VERSION_MINOR=$(sed -n "s/^KERNEL_MIN=\([0-9]*$\)/\1/p" < Makefile | xargs)
 LINUX_VERSION_PATCHLEVEL=$(sed -n "s/^KERNEL_PATCHLEVEL=\([0-9]*$\)/\1/p" < Makefile | xargs)
@@ -11,8 +12,7 @@ LINUX_VERSION=$LINUX_VERSION_MAJOR.$LINUX_VERSION_MINOR.$LINUX_VERSION_PATCHLEVE
 LINUX_PACKAGE_RELEASE=$(sed -n "s/^PKGREL=\([0-9]*$\)/\1/p" < Makefile | xargs)
 LINUX_FLAVOR=$(sed -n "s/^PVE_BUILD_TYPE ?=\(.*\)$/\1/p" < Makefile | xargs)
 
-
+while getopts "MmprfdLBh" OPTION; do
-while getopts "MmprfdLh" OPTION; do
     case $OPTION in
     M)
         echo $LINUX_VERSION_MAJOR
@@ -43,6 +43,10 @@ while getopts "MmprfdLh" OPTION; do
         echo $LINUX_VERSION
         exit 0
         ;;
+    B)
+        echo $(git --git-dir $LINUX_REPOSITORY/.git log -1 --pretty=%B | sed -n "s/^.*Ubuntu-\([0-9.-]*\).*$/\1/p")
+        exit 0
+        ;;
     h)
         echo "commit.sh [-Mmprfh]]"
         echo "  -M  major version"