support arbitrary branches

Author: MarkWolters

.github/workflows/run-bench.yml

@@ -77,12 +77,34 @@ jobs:
       # Parse the branches input and run benchmarks for each branch
       - name: Run benchmarks for each branch
         run: |
+          # Debug: Print the branches input
+          echo "Branches input: '${{ github.event.inputs.branches }}'"
+
           # Get the list of branches to benchmark
-          IFS=' ' read -r -a BRANCHES <<< "${{ github.event.inputs.branches }}"
+          # If the input is empty, use the default value from workflow definition
+          BRANCHES_INPUT="${{ github.event.inputs.branches }}"
+          if [ -z "$BRANCHES_INPUT" ]; then
+            echo "No branches specified, using default: 'github_actions main'"
+            BRANCHES_INPUT="github_actions main"
+          fi
+
+          echo "Parsing branches from: '$BRANCHES_INPUT'"
+          IFS=' ' read -r -a BRANCHES <<< "$BRANCHES_INPUT"
+
+          # Debug: Print the parsed branches
+          echo "Parsed ${#BRANCHES[@]} branches: ${BRANCHES[*]}"
 
           # Create a directory to store all benchmark results
           mkdir -p benchmark_results
 
+          # If still no branches, add current branch
+          if [ ${#BRANCHES[@]} -eq 0 ]; then
+            echo "No branches parsed, adding current branch"
+            CURRENT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
+            BRANCHES=("$CURRENT_BRANCH")
+            echo "Using current branch: $CURRENT_BRANCH"
+          fi
+
           # Loop through each branch
           for branch in "${BRANCHES[@]}"; do
             echo "Processing branch: $branch"