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ci: add rust-cache action #526

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b99b8a8
ci: remove rustup env vars, causing warnings
Firestar99 Feb 12, 2026
7fc0591
ci: move "test difftest" to test job
Firestar99 Feb 12, 2026
61d20c0
ci: don't cache vulkan sdk on mac, restore is broken
Firestar99 Feb 16, 2026
ed91ac2
ci: add rust-cache action after toolchain install
Firestar99 Feb 10, 2026
d7d3681
ci: reuse rust-cache between different jobs on the same platform, rem…
Firestar99 Feb 12, 2026
b601d7f
ci: make "test" prep deps cache for compiletests and difftests
Firestar99 Feb 13, 2026
ee3f47b
ci: only save cache on main
Firestar99 Feb 16, 2026
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52 changes: 41 additions & 11 deletions .github/workflows/ci.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -23,17 +23,16 @@ jobs:
matrix:
os: [ ubuntu-latest, windows-latest, macOS-latest ]
runs-on: ${{ matrix.os }}
env:
RUSTUP_UNPACK_RAM: "26214400"
RUSTUP_IO_THREADS: "1"
steps:
- uses: actions/checkout@v4
- name: Install Vulkan SDK
uses: jakoch/install-vulkan-sdk-action@v1
with:
vulkan_version: 1.4.321.0
install_runtime: true
cache: true
# cache restore on mac is broken
# see https://github.com/jakoch/install-vulkan-sdk-action/issues/558
cache: ${{ runner.os != 'macOS' }}
stripdown: true
- if: ${{ runner.os == 'Linux' }}
name: Linux - Install native dependencies
Expand All @@ -42,6 +41,11 @@ jobs:
# figure out native target triple while we're at it
- name: install rust-toolchain
run: echo "TARGET=$(rustc --print host-tuple)" >> "$GITHUB_ENV"
- uses: Swatinem/rust-cache@v2
with:
add-job-id-key: "false"
shared-key: "base"
save-if: ${{ github.ref_name == 'main' }}
# Fetch dependencies in a separate step to clearly show how long each part
# of the testing takes
- name: cargo fetch --locked
Expand All @@ -55,8 +59,8 @@ jobs:
- name: rustc_codegen_spirv test
run: cargo test -p rustc_codegen_spirv --release --no-default-features --features "use-installed-tools"

- name: workspace test (excluding examples & difftest)
run: cargo test --release --workspace --exclude "example-runner-*" --exclude "difftest*" --no-default-features --features "use-installed-tools,clap"
- name: workspace test (excluding examples)
run: cargo test --release --workspace --exclude "example-runner-*" --no-default-features --features "use-installed-tools,clap"

# Examples
- name: cargo check examples
Expand All @@ -77,16 +81,24 @@ jobs:
OUT_DIR: "target/debug/ci/out"
run: cargo run -p example-runner-wgpu-builder --no-default-features --features "use-installed-tools"

# Our test runners select very different features for dependencies, so they need to be two separate builds.
# * compiletests depends on `rustc_codegen_spirv` directly with features `use-installed-tools`
# * difftests depends on `spirv-builder` with no features, which excludes `rustc_codegen_spirv` entirely.
# The individual difftest crates depend on it and run the spirv compile, never the test runner itself.
- name: prep cache for other jobs
if: github.ref_name == 'main'
run: |
cargo build -p compiletests --release --no-default-features --features "use-installed-tools"
cargo build -p difftests --release --no-default-features --features "use-installed-tools"


android:
name: Android
strategy:
matrix:
os: [ ubuntu-latest ]
target: [ aarch64-linux-android ]
runs-on: ${{ matrix.os }}
env:
RUSTUP_UNPACK_RAM: "26214400"
RUSTUP_IO_THREADS: "1"
steps:
- uses: actions/checkout@v4
- name: Install Vulkan SDK
Expand All @@ -98,6 +110,11 @@ jobs:
stripdown: true
- name: install rust-toolchain
run: cargo version
- uses: Swatinem/rust-cache@v2
with:
add-job-id-key: "false"
shared-key: "android"
save-if: ${{ github.ref_name == 'main' }}
- name: cargo fetch --locked
run: cargo fetch --locked --target ${{ matrix.target }}

Expand Down Expand Up @@ -142,6 +159,11 @@ jobs:
stripdown: true
- name: install rust-toolchain
run: echo "TARGET=$(rustc --print host-tuple)" >> "$GITHUB_ENV"
- uses: Swatinem/rust-cache@v2
with:
add-job-id-key: "false"
shared-key: "base"
save-if: "false"
- name: cargo fetch --locked
run: cargo fetch --locked --target $TARGET
- name: compiletest
Expand Down Expand Up @@ -177,12 +199,20 @@ jobs:
sudo apt install -y xvfb libgl1-mesa-dri libxcb-xfixes0-dev mesa-vulkan-drivers
- name: install rust-toolchain
run: echo "TARGET=$(rustc --print host-tuple)" >> "$GITHUB_ENV"
- uses: Swatinem/rust-cache@v2
with:
add-job-id-key: "false"
shared-key: "base"
save-if: "false"
- uses: Swatinem/rust-cache@v2
with:
add-job-id-key: "false"
shared-key: "difftest"
workspaces: "tests/difftests/tests"
- name: cargo fetch --locked
run: cargo fetch --locked --target $TARGET
- name: cargo fetch --locked difftests
run: cargo fetch --locked --manifest-path=tests/difftests/tests/Cargo.toml --target $TARGET
- name: test difftest
run: cargo test -p "difftest*" --release --no-default-features --features "use-installed-tools"
- name: difftests
run: cargo run -p difftests --release --no-default-features --features "use-installed-tools"

Expand Down
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