Do not build docs in try builds

.github/workflows/ci.yml

@@ -578,6 +578,7 @@ jobs:
       actions: write
     name: "try - ${{ matrix.name }}"
     env:
+      DIST_TRY_BUILD: 1
       CI_JOB_NAME: "${{ matrix.name }}"
       CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
       SCCACHE_BUCKET: rust-lang-ci-sccache2

src/ci/docker/run.sh

@@ -264,6 +264,7 @@ docker \
   --env RUST_CI_OVERRIDE_RELEASE_CHANNEL \
   --env CI_JOB_NAME="${CI_JOB_NAME-$IMAGE}" \
   --env BASE_COMMIT="$BASE_COMMIT" \
+  --env DIST_TRY_BUILD \
   --init \
   --rm \
   rust-ci \

src/ci/github-actions/ci.yml

@@ -757,6 +757,7 @@ jobs:
     <<: *base-ci-job
     name: try - ${{ matrix.name }}
     env:
+      DIST_TRY_BUILD: 1
       <<: [*shared-ci-variables, *prod-variables]
     if: github.event_name == 'push' && (github.ref == 'refs/heads/try' || github.ref == 'refs/heads/try-perf') && github.repository == 'rust-lang-ci/rust'
     strategy:

src/ci/stage-build.py

@@ -48,6 +48,11 @@
 
 LLVM_BOLT_CRATES = LLVM_PGO_CRATES
 
+
+def is_try_build() -> bool:
+    return os.environ.get("DIST_TRY_BUILD", "0") != "0"
+
+
 class Pipeline:
     # Paths
     def checkout_path(self) -> Path:
@@ -851,6 +856,13 @@ def run(runner: BenchmarkRunner):
 
     build_args = sys.argv[1:]
 
+    # Skip components that are not needed for try builds to speed them up
+    if is_try_build():
+        LOGGER.info("Skipping building of unimportant components for a try build")
+        for target in ("rust-docs", "rustc-docs", "rust-docs-json", "rust-analyzer",
+                       "rustc-src", "clippy", "miri", "rustfmt"):
+            build_args.extend(["--exclude", target])
+
     timer = Timer()
     pipeline = create_pipeline()
 
@@ -865,6 +877,7 @@ def run(runner: BenchmarkRunner):
 
     print_binary_sizes(pipeline)
 
+
 if __name__ == "__main__":
     runner = DefaultBenchmarkRunner()
     run(runner)