Auto merge of rust-lang#133912 - MarcoIeni:test-codebuild-runner, r=<try>

[experiment] test code build runner

try-job: x86_64-gnu

Author: bors

src/ci/github-actions/calculate-job-matrix.py

@@ -176,6 +176,21 @@ def format_run_type(run_type: WorkflowRunType) -> str:
         raise AssertionError()
 
 
+# Add new function before main:
+def substitute_github_vars(jobs: list) -> list:
+    """Replace GitHub context variables with environment variables in job configs."""
+    for job in jobs:
+        if "os" in job:
+            job["os"] = job["os"].replace(
+                "${{ github.run_id }}",
+                os.environ["GITHUB_RUN_ID"]
+            ).replace(
+                "${{ github.run_attempt }}",
+                os.environ["GITHUB_RUN_ATTEMPT"]
+            )
+    return jobs
+
+
 if __name__ == "__main__":
     logging.basicConfig(level=logging.INFO)
 
@@ -195,6 +210,7 @@ def format_run_type(run_type: WorkflowRunType) -> str:
         jobs = calculate_jobs(run_type, data)
     jobs = skip_jobs(jobs, channel)
 
+
     if not jobs:
         raise Exception("Scheduled job list is empty, this is an error")
 

src/ci/github-actions/jobs.yml

@@ -46,6 +46,10 @@ runners:
   - &job-aarch64-linux
     os: ubuntu-22.04-arm64-8core-32gb
 
+  - &job-linux-4c-codebuild
+    os: codebuild-ubuntu-24-4c-${{ github.run_id }}-${{ github.run_attempt }}
+    <<: *base-job
+
 envs:
   env-x86_64-apple-tests: &env-x86_64-apple-tests
     SCRIPT: ./x.py --stage 2 test --skip tests/ui --skip tests/rustdoc -- --exact
@@ -237,7 +241,7 @@ auto:
     <<: *job-linux-4c
 
   - image: x86_64-gnu
-    <<: *job-linux-4c
+    <<: *job-linux-4c-codebuild
 
   # This job ensures commits landing on nightly still pass the full
   # test suite on the stable channel. There are some UI tests that