Rainj me/rust server refactor2 (#35239)

.github/workflows/_pr-test-check-changes.yml

@@ -25,6 +25,8 @@ on:
         value: ${{ jobs.run.outputs.jit_kernel }}
       multimodal_gen:
         value: ${{ jobs.run.outputs.multimodal_gen }}
+      rust_workspace:
+        value: ${{ jobs.run.outputs.rust_workspace }}
       partitions:
         value: ${{ jobs.run.outputs.partitions }}
       partition_model_sha:
@@ -45,6 +47,7 @@ jobs:
       sgl_kernel: ${{ steps.filter.outputs.sgl_kernel }}
       jit_kernel: ${{ steps.filter.outputs.jit_kernel || steps.run-mode.outputs.run_all_tests }}
       multimodal_gen: ${{ steps.filter.outputs.multimodal_gen || steps.run-mode.outputs.run_all_tests }}
+      rust_workspace: ${{ steps.filter.outputs.rust_workspace || steps.run-mode.outputs.run_all_tests }}
       partitions: ${{ steps.partitions.outputs.partitions }}
       partition_model_sha: ${{ steps.partition-model-sha.outputs.sha }}
       runs_on_map: ${{ steps.runner-map.outputs.runs_on_map }}
@@ -89,6 +92,8 @@ jobs:
               - "scripts/ci/cuda/*"
               - "scripts/ci/utils/*"
               - "test/**/!(*.md)"
+              - "rust/**"
+              - "proto/sglang/runtime/v1/sglang.proto"
             multimodal_gen:
               - ".github/workflows/pr-test.yml"
               - ".github/workflows/pr-test-multimodal-gen.yml"
@@ -113,6 +118,13 @@ jobs:
               # Intentionally excludes ".github/workflows/pr-test-sgl-kernel.yml" —
               # see API-side detector below for rationale.
               - "python/sglang/kernels/aot/**/!(*.md|THIRDPARTYNOTICES.txt|LICENSE)"
+            rust_workspace:
+              # Gates the cargo test in test/registered/rust/; exported to the
+              # CPU stage as its negation, SGLANG_SKIP_RUST_TESTS.
+              - "rust/**"
+              - "proto/sglang/runtime/v1/sglang.proto"
+              - "test/registered/rust/**"
+              - ".github/workflows/_pr-test-*.yml"
 
       - name: Determine full-parallel mode
         id: parallel-mode
@@ -223,6 +235,7 @@ jobs:
             echo "| sgl_kernel        | ${{ steps.filter.outputs.sgl_kernel }} |"
             echo "| jit_kernel        | ${{ steps.filter.outputs.jit_kernel || steps.run-mode.outputs.run_all_tests }} |"
             echo "| multimodal_gen    | ${{ steps.filter.outputs.multimodal_gen || steps.run-mode.outputs.run_all_tests }} |"
+            echo "| rust_workspace    | ${{ steps.filter.outputs.rust_workspace || steps.run-mode.outputs.run_all_tests }} |"
             echo "| b200_runner       | ${{ steps.set-runner.outputs.b200_runner }} |"
             echo "| enable_retry      | ${{ steps.set-retry.outputs.enable_retry }} |"
             echo "| continue_on_error | ${{ steps.set-continue-on-error.outputs.continue_on_error }} |"

.github/workflows/_pr-test-stage-cpu.yml

@@ -13,7 +13,7 @@ on:
         type: string
         required: true
       check_changes:
-        description: 'toJson(needs.check-changes.outputs). Read via fromJson(...).main_package / continue_on_error / partition_model_sha.'
+        description: 'toJson(needs.check-changes.outputs). Read via fromJson(...).main_package / rust_workspace / continue_on_error / partition_model_sha.'
         type: string
         required: true
       caller_inputs:
@@ -153,6 +153,9 @@ jobs:
         timeout-minutes: ${{ fromJson(inputs.run_timeout_minutes) }}
         env:
           CONTINUE_ON_ERROR_FLAG: ${{ fromJson(inputs.check_changes).continue_on_error == 'true' && '--continue-on-error' || '' }}
+          # Normalized to a literal true/false: EnvBool rejects an empty string,
+          # which is what a missing check-changes output would expand to.
+          SGLANG_SKIP_RUST_TESTS: ${{ fromJson(inputs.check_changes).rust_workspace == 'true' && 'false' || 'true' }}
         run: |
           cd test/
           python3 run_suite.py --hw cpu --suite ${{ inputs.self_name }} --auto-partition-id ${{ matrix.partition }} --auto-partition-size ${{ fromJson(inputs.partitions)[inputs.self_name].size }} --partition-model-file /tmp/partition-model.json $CONTINUE_ON_ERROR_FLAG

.github/workflows/lint.yml

@@ -13,16 +13,6 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Detect Rust workspace changes
-        id: paths
-        uses: dorny/paths-filter@v3
-        with:
-          filters: |
-            rust_workspace:
-              - 'rust/**'
-              - 'proto/sglang/runtime/v1/sglang.proto'
-              - '.github/workflows/lint.yml'
-
       # Fail-fast gate: docs_new/ was renamed to docs/ (#32123). git's rename
       # detection silently re-adds NEW files under docs_new/ on merge without a
       # conflict, which would resurrect the directory. We check the checked-out
@@ -60,13 +50,6 @@ jobs:
       - name: Run pre-commit checks
         run: SKIP=no-commit-to-branch pre-commit run --all-files --show-diff-on-failure
 
-      # Not in the rust-ext build job: its cache key covers the built .so files,
-      # and a test script is not a build input. Tests take ~1s; the timeout is
-      # for a cold cache, which codegens the dependency graph first.
-      - name: Run rust/ workspace tests
-        if: steps.paths.outputs.rust_workspace == 'true'
-        run: cd rust && timeout 900 cargo test --workspace
-
       - name: Run lychee docs checks (offline references)
         uses: lycheeverse/lychee-action@8646ba30535128ac92d33dfc9133794bfdd9b411 # v2
         with: