Separate version for branchess

Author: eddymoulton

.github/workflows/ci.yml

@@ -22,8 +22,16 @@ jobs:
         uses: actions/setup-dotnet@v4.0.0
         with:
           dotnet-version: 9.0.x
+      - name: Compute version suffix for branch builds
+        if: ${{ !startsWith(github.ref, 'refs/tags/') }}
+        id: version
+        run: |
+          # Sanitize branch name: lowercase, replace non-alphanumeric with hyphen, trim to 20 chars
+          BRANCH="${GITHUB_HEAD_REF:-${GITHUB_REF_NAME}}"
+          SAFE_BRANCH=$(echo "$BRANCH" | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9]/-/g' | sed 's/--*/-/g' | sed 's/^-//' | sed 's/-$//' | cut -c1-20)
+          echo "override=octopus.${SAFE_BRANCH}.${{ github.run_number }}" >> "$GITHUB_OUTPUT"
       - name: Build
-        run: dotnet build LibGit2Sharp.sln --configuration Release
+        run: dotnet build LibGit2Sharp.sln --configuration Release ${{ steps.version.outputs.override && format('/p:MinVerDefaultPreReleaseIdentifiers="{0}"', steps.version.outputs.override) || '' }}
       - name: Upload packages
         uses: actions/upload-artifact@v4.3.1
         with:
@@ -32,7 +40,7 @@ jobs:
           retention-days: 7
       - name: Verify trimming compatibility
         run: dotnet publish TrimmingTestApp
-      
+
   test:
     name: Test / ${{ matrix.os }} / ${{ matrix.arch }} / ${{ matrix.tfm }}
     runs-on: ${{ matrix.os }}
@@ -93,7 +101,7 @@ jobs:
             git_command="git config --global --add safe.directory /app"
             test_command="dotnet test LibGit2Sharp.sln --configuration Release -p:TargetFrameworks=${{ matrix.tfm }} --logger "GitHubActions" -p:ExtraDefine=LEAKS_IDENTIFYING"
             docker run -t --rm --platform linux/${{ matrix.arch }} -v "$PWD:/app" -e OPENSSL_ENABLE_SHA1_SIGNATURES=1 gittools/build-images:${{ matrix.distro }}-sdk-${{ matrix.sdk }} sh -c "$git_command && $test_command"
-  
+
   nuget-push:
     name: Octopus NuGet Push
     needs: [build, test, test-linux]
@@ -110,4 +118,4 @@ jobs:
         env:
           FEED_API_KEY: ${{ secrets.FEED_API_KEY }}
           FEED_SOURCE: ${{ secrets.FEED_SOURCE }}
-        run: dotnet nuget push staging/**/*.nupkg --api-key "$FEED_API_KEY" --source "$FEED_SOURCE"
+        run: dotnet nuget push staging/**/*.nupkg --api-key "$FEED_API_KEY" --source "$FEED_SOURCE" --skip-duplicate