generate benches in CI for matrix strategy by cargo bench -- --list -…

…-format terse

.github/workflows/ci.yml

@@ -22,8 +22,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Discover benches
-        id: discover
+      - name: Discover subcrates
+        id: discover_subcrates
         run: |
           set -euo pipefail
 
@@ -40,32 +40,22 @@ jobs:
           # Output the JSON array to GitHub Actions output
           echo "subcrates=$SUBCRATES_JSON" >> "$GITHUB_OUTPUT"
 
-          SUBCRATES_FOR_BENCHES=$(echo "$SUBCRATES" | grep q146 || true)
-
-          # Build a JSON array of objects
-          # Each object: { "subcrate": "xxx", "bench": "yyy" }
-          # For each subcrate, we look under benches/ for *.rs files
-          JSON='['
-          first=true
-          for crate in $SUBCRATES_FOR_BENCHES; do
-            BENCH_FILES=$(find "implementations/$crate/benches" -maxdepth 1 -name '*.rs' -printf '%f\n' 2>/dev/null || true)
-            for bf in $BENCH_FILES; do
-              bench_name="${bf%.rs}" # remove .rs extension
-              if [ "$first" = true ]; then
-                first=false
-              else
-                JSON="$JSON,"
-              fi
-              JSON="$JSON{\"subcrate\":\"$crate\",\"bench\":\"$bench_name\"}"
-            done
-          done
-          JSON="$JSON]"
-
-          echo "benches=$JSON" >> "$GITHUB_OUTPUT"
+      - name: Discover benches
+        id: discover_benches
+        run: |
+          BENCHES=$(cargo bench -- --list --format terse | grep q146 || true)
+          # Remove the trailing ": benchmark"
+          BENCHES_CLEANED=$(echo "$BENCHES" | sed 's/: benchmark$//')
+
+          # Convert each line into a JSON string and then wrap them into a JSON array
+          BENCHES_JSON=$(echo "$BENCHES_CLEANED" | jq -R . | jq -s . | jq -c .)
+
+          # Output the JSON array to GitHub Actions output
+          echo "benches=$BENCHES_JSON" >> "$GITHUB_OUTPUT"
 
     outputs:
-      benches: ${{ steps.discover.outputs.benches }}
-      subcrates: ${{ steps.discover.outputs.subcrates }}
+      benches: ${{ steps.discover_benches.outputs.benches }}
+      subcrates: ${{ steps.discover_subcrates.outputs.subcrates }}
 
   bench:
     needs: define-matrix