Update ASV workflow in GitHub Actions

.github/workflows/asv.yml

@@ -4,47 +4,58 @@ on:
   schedule:
     - cron: '0 0 * * 0'
   workflow_dispatch:
-  pull_request:    
+  pull_request:
+
+permissions:
+  contents: write
 
 jobs:
   build:
     name: Build and run benchmarks
     runs-on: ubuntu-24.04
-    defaults:
-      run:
-        shell: bash -l {0} # required for conda env
+
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
-          repository: 'scipp/scipp'
+          repository: scipp/scipp
+          ref: main
           submodules: true
-          fetch-depth: 0  # history required so cmake can determine version
+          fetch-depth: 0
 
-      - name: Setup conda environment
-        uses: mamba-org/setup-micromamba@v2
+      - uses: actions/checkout@v7
         with:
-          micromamba-version: 2.5.0-1
-          environment-file: .buildconfig/ci-linux.yml
-          cache-environment: true
-          create-args: python=3.11
+          path: scipp-benchmarks
 
-      - uses: actions/checkout@v4
+      - uses: prefix-dev/setup-pixi@v0.10.2
         with:
-          path: 'scipp-benchmarks'
-
-      - uses: hendrikmuhs/ccache-action@v1.2.20
-
-      - run: cmake --preset base
-      - run: cmake --build --preset build
-      - run: ctest --preset test
-      - run: tox -e asv
-
-      - uses: stefanzweifel/git-auto-commit-action@v4
+          pixi-version: v0.76.0
+          environments: benchmark
+          frozen: true
+
+      - name: Register benchmark machine
+        run: >
+          pixi run --frozen -e benchmark asv machine --yes
+          --machine github-ubuntu-24.04-pixi-py312
+
+      - name: Run benchmarks
+        run: >
+          pixi run --frozen -e benchmark bench
+          --machine github-ubuntu-24.04-pixi-py312
+
+      - name: Generate benchmark site
+        run: pixi run --frozen -e benchmark asv publish
+
+      - name: Commit benchmark results
+        if: github.event_name != 'pull_request' && github.ref == 'refs/heads/main'
+        uses: stefanzweifel/git-auto-commit-action@v4
         with:
           repository: scipp-benchmarks
+          branch: main
           file_pattern: results/*
+          commit_message: Update benchmark results
 
       - name: Deploy benchmark results
+        if: github.event_name != 'pull_request' && github.ref == 'refs/heads/main'
         uses: JamesIves/github-pages-deploy-action@v4.8.0
         with:
           branch: gh_pages