.github: sync release job with latest changes

- Cleanup any docker images to free up space
 - Build on /mnt
 - Update artifacts: pattern after API changes
 - Add .sha256 checksums to each release tarball

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

.github/workflows/release.yml

@@ -28,9 +28,14 @@ jobs:
         variant: [netconf, classic]
       fail-fast: false
     steps:
+      - name: Maintenance
+        run: |
+          docker image prune -af
+          docker volume prune -f
+          docker container prune -f
       - uses: actions/checkout@v4
       - name: Set Release Variables
-        id: build
+        id: vars
         run: |
           if [ -n "${{ inputs.version }}" ]; then
               ver=${{ inputs.version }}
@@ -51,6 +56,7 @@ jobs:
           fi
           echo "dir=infix-$target"        >> $GITHUB_OUTPUT
           echo "tgz=infix-$target.tar.gz" >> $GITHUB_OUTPUT
+          echo "out=/mnt/x-$target"       >> $GITHUB_OUTPUT
       - name: Restore Cache of dl/
         uses: actions/cache@v4
         with:
@@ -69,36 +75,46 @@ jobs:
             ccache-
       - name: Configure & Build
         env:
-          INFIX_RELEASE: ${{ steps.build.outputs.ver }}
+          INFIX_RELEASE: ${{ steps.vars.outputs.ver }}
         run: |
           if [ "${{ matrix.variant }}" = "netconf" ]; then
               target=${{ matrix.platform }}_defconfig
           else
               target=${{ matrix.platform }}_${{ matrix.variant }}_defconfig
           fi
-          echo "Buildring $target ..."
+          echo "Building $target ..."
+          sudo mkdir ${{ steps.vars.outputs.out }}
+          sudo chown $(id -un):$(id -gn) ${{ steps.vars.outputs.out }}
+          export O=${{ steps.vars.outputs.out }}
           make $target
           make
       - name: Prepare Artifact
         run: |
-          cd output
-          mv images ${{ steps.build.outputs.dir }}
-          ln -s ${{ steps.build.outputs.dir }} images
-          tar chfz ${{ steps.build.outputs.tgz }} ${{ steps.build.outputs.dir }}
+          cd ${{ steps.vars.outputs.out }}
+          mv images ${{ steps.vars.outputs.dir }}
+          ln -s ${{ steps.vars.outputs.dir }} images
+          tar chfz ${{ steps.vars.outputs.tgz }} ${{ steps.vars.outputs.dir }}
       - uses: actions/upload-artifact@v4
         with:
-          path: output/${{ steps.build.outputs.tgz }}
+          path: ${{ steps.vars.outputs.out }}/${{ steps.vars.outputs.tgz }}
           name: artifact-${{ matrix.variant }}-${{ matrix.platform }}
   release:
     name: Release Infix ${{ github.ref_name }}
     needs: build
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
     steps:
       - uses: actions/checkout@v4
       - uses: actions/download-artifact@v4
         with:
           pattern: "artifact-*"
           merge-multiple: true
+      - name: Create checksums ...
+        run: |
+          for file in *.tar.gz; do
+              sha256sum $file > $file.sha256
+          done
       - name: Extract ChangeLog entry ...
         run: |
           awk '/^-----*$/{if (x == 1) exit; x=1;next}x' doc/ChangeLog.md \
@@ -109,7 +125,7 @@ jobs:
           name: Infix ${{ github.ref_name }}
           prerelease: ${{ needs.build.outputs.pre }}
           bodyFile:  release.md
-          artifacts: artifact/*
+          artifacts: "*.tar.gz*"
       - name: Summary
         run: |
           cat <<EOF >> $GITHUB_STEP_SUMMARY