[CI] Support CPU stage and auto-batch same-stage files in /rerun-test (#22081)

.github/workflows/rerun-test.yml

@@ -5,7 +5,7 @@ on:
   workflow_dispatch:
     inputs:
       test_command:
-        description: "Test command to run (e.g. 'registered/core/test_srt_endpoint.py TestSRTEndpoint.test_simple_decode')"
+        description: "Test command(s) to run, one per line (e.g. 'registered/core/test_srt_endpoint.py TestSRTEndpoint.test_simple_decode')"
         required: true
         type: string
       runner_label:
@@ -22,6 +22,7 @@ on:
           - 8-gpu-h200
           - 8-gpu-h20
           - 8-gpu-b200
+          - ubuntu-latest
       pr_head_sha:
         description: "PR head SHA to checkout (for /rerun-test on fork PRs)"
         required: false
@@ -32,6 +33,11 @@ on:
         required: false
         type: string
         default: "false"
+      is_cpu:
+        description: "Run as CPU-only test (uses ubuntu-latest with uv pip install)"
+        required: false
+        type: string
+        default: "false"
 
 env:
   SGLANG_IS_IN_CI: true
@@ -45,6 +51,7 @@ permissions:
 
 jobs:
   rerun-test-cuda:
+    if: inputs.is_cpu != 'true'
     runs-on: ${{ inputs.runner_label }}
     timeout-minutes: 120
     env:
@@ -77,7 +84,53 @@ jobs:
             source /etc/profile.d/sglang-ci.sh
           fi
           cd test/
-          python3 ${{ inputs.test_command }}
+          echo "${{ inputs.test_command }}" | while IFS= read -r cmd; do
+            [ -z "$cmd" ] && continue
+            echo ">>> Running: python3 $cmd"
+            python3 $cmd || exit 1
+          done
 
       - uses: ./.github/actions/upload-cuda-coredumps
         if: always()
+
+  rerun-test-cpu:
+    if: inputs.is_cpu == 'true'
+    runs-on: ubuntu-latest
+    timeout-minutes: 120
+    steps:
+      - name: Free disk space
+        run: |
+          sudo rm -rf /usr/share/dotnet /usr/local/lib/android /opt/ghc
+          df -h
+
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.pr_head_sha || github.sha }}
+
+      - uses: ./.github/actions/check-maintenance
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.10'
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v5
+
+      - name: Install dependencies
+        timeout-minutes: 20
+        env:
+          UV_SYSTEM_PYTHON: "1"
+        run: |
+          uv pip install -e "python[dev]" --index-strategy unsafe-best-match --prerelease allow
+
+      - name: Run test
+        timeout-minutes: 60
+        run: |
+          cd test/
+          echo "${{ inputs.test_command }}" | while IFS= read -r cmd; do
+            [ -z "$cmd" ] && continue
+            echo ">>> Running: python3 $cmd"
+            python3 $cmd || exit 1
+          done