Add a gh-action and buildomat job to cargo check on no-default-features.

.cargo/config.toml

@@ -8,6 +8,7 @@
 # CI scripts:
 # - .github/buildomat/build-and-test.sh
 # - .github/buildomat/jobs/clippy.sh
+# - .github/buildomat/jobs/check-features.sh
 # - .github/workflows/rust.yml
 #
 [build]

.github/buildomat/jobs/check-features.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+#:
+#: name = "check-features (helios)"
+#: variety = "basic"
+#: target = "helios-2.0"
+#: rust_toolchain = true
+#: output_rules = []
+
+# Run cargo check on illumos with feature-specifics like `no-default-features`.
+
+set -o errexit
+set -o pipefail
+set -o xtrace
+
+cargo --version
+rustc --version
+
+#
+# Set up our PATH for use with this workspace.
+#
+source ./env.sh
+
+banner prerequisites
+ptime -m bash ./tools/install_builder_prerequisites.sh -y
+
+banner check
+export CARGO_INCREMENTAL=0
+ptime -m cargo check --workspace --bins --tests --no-default-features
+RUSTDOCFLAGS="--document-private-items -D warnings" ptime -m cargo doc --workspace --no-deps --no-default-features

.github/buildomat/jobs/clippy.sh

@@ -10,7 +10,7 @@
 # (that we want to check) is conditionally-compiled on illumos only.
 #
 # Note that `cargo clippy` includes `cargo check, so this ends up checking all
-# of our code.
+# of our (default) code.
 
 set -o errexit
 set -o pipefail

.github/workflows/rust.yml

@@ -53,7 +53,7 @@ jobs:
       run: cargo run --bin omicron-package -- -t default check
 
   # Note that `cargo clippy` includes `cargo check, so this ends up checking all
-  # of our code.
+  # of our (default) code.
   clippy-lint:
     runs-on: ubuntu-22.04
     env:
@@ -82,6 +82,32 @@ jobs:
     - name: Run Clippy Lints
       run: cargo xtask clippy
 
+  check-features:
+    runs-on: ubuntu-22.04
+    env:
+      CARGO_INCREMENTAL: 0
+    steps:
+    # This repo is unstable and unnecessary: https://github.com/microsoft/linux-package-repositories/issues/34
+    - name: Disable packages.microsoft.com repo
+      run: sudo rm -f /etc/apt/sources.list.d/microsoft-prod.list
+    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      with:
+        ref: ${{ github.event.pull_request.head.sha }} # see omicron#4461
+    - uses: Swatinem/rust-cache@23bce251a8cd2ffc3c1075eaa2367cf899916d84 # v2.7.3
+      if: ${{ github.ref != 'refs/heads/main' }}
+    - name: Report cargo version
+      run: cargo --version
+    - name: Update PATH
+      run: source "./env.sh"; echo "PATH=$PATH" >> "$GITHUB_ENV"
+    - name: Print PATH
+      run: echo $PATH
+    - name: Print GITHUB_ENV
+      run: cat "$GITHUB_ENV"
+    - name: Install Pre-Requisites
+      run: ./tools/install_builder_prerequisites.sh -y
+    - name: Run Cargo Check (No Default Features)
+      run: cargo check --workspace --bins --tests --no-default-features
+
   # This is just a test build of docs.  Publicly available docs are built via
   # the separate "rustdocs" repo.
   build-docs: