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ci: add rust-cache action #526

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9195924
ci: add rust-cache action after toolchain install
Firestar99 Feb 10, 2026
bb7f0d1
ci: reuse rust-cache between different jobs on the same platform, rem…
Firestar99 Feb 12, 2026
d08ce6e
ci: make "test" prep deps cache for compiletests and difftests
Firestar99 Feb 13, 2026
6746cbd
ci: only save cache on main
Firestar99 Feb 16, 2026
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36 changes: 36 additions & 0 deletions .github/workflows/ci.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +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 Down Expand Up @@ -76,6 +81,17 @@ 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:
Expand All @@ -94,6 +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 @@ -138,6 +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 $TARGET
- name: compiletest
Expand Down Expand Up @@ -173,6 +199,16 @@ jobs:
sudo apt install -y xvfb libgl1-mesa-dri libxcb-xfixes0-dev mesa-vulkan-drivers
- name: install rust-toolchain
run: echo "TARGET=$(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
Expand Down
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