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geekbrother merged 3 commits into from
Jun 19, 2026
Merged

ci: Swatinem caching + opt-in mold + build-once release image #26

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8e45e9e
ci: migrate app-check Rust caching to Swatinem/rust-cache
geekbrother Jun 11, 2026
5721318
ci: add opt-in mold linker for the test jobs
geekbrother Jun 12, 2026
8818166
ci: build the release image once, push per-env (no double compile)
geekbrother Jun 12, 2026
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206 changes: 53 additions & 153 deletions .github/workflows/ci-check-app.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -36,9 +36,23 @@ on:
type: boolean
default: true
use-sccache:
description: 'Run sccache-cache before running tests'
# DEPRECATED / no-op: sccache had no persistent backend configured here
# (its object store was never cached), so it provided no cross-run
# benefit and disabled incremental compilation, which fights the
# Swatinem/rust-cache target/ cache. The input is kept so existing
# callers (and ci.yml) don't break; it no longer wires anything.
description: '(deprecated, no-op) Run sccache-cache before running tests'
type: boolean
default: true
use-mold:
# Opt-in (default false): mold is a linker, so it only helps jobs that
# link a binary — i.e. tests / tests-suites, not clippy (check-only) or
# fmt (no compile). Keep this OFF for `cargo test --release` / LTO test
# builds: mold can't read ThinLTO bitcode objects without the LLVM
# plugin and the final link fails.
description: 'Use the mold linker (clang driver) for the test jobs. Only for non-LTO debug test builds.'
type: boolean
default: false
use-postgresql:
description: 'Run postgresql before running tests'
type: boolean
Expand Down Expand Up @@ -83,47 +97,22 @@ jobs:
toolchain: ${{ inputs.rust-toolchain }}
components: clippy

- name: Restore Cargo cache
id: cache-restore
uses: actions/cache/restore@v4
- name: Rust cache
uses: Swatinem/rust-cache@23869a5bd66c73db3c0ac40331f3206eb23791dc # v2.9.1
with:
path: |
~/.cargo/bin/
~/.cargo/registry/
~/.cargo/git/
target/
key: ${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-clippy-${{ hashFiles('**/Cargo.lock') }}
restore-keys: |
${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-clippy-

- name: Clean target if Cargo.lock changed
if: steps.cache-restore.outputs.cache-hit != 'true'
run: rm -rf target/
prefix-key: ${{ inputs.rust-cache-prefix }}
shared-key: clippy
save-if: ${{ inputs.rust-cache-save }}

- name: Install Protoc
if: ${{ inputs.install-protoc == true }}
uses: arduino/setup-protoc@v3
with:
repo-token: ${{ secrets.GITHUB_TOKEN }}

- name: Run sccache-cache
if: ${{ inputs.use-sccache == true }}
uses: mozilla-actions/sccache-action@v0.0.4

- name: Clippy
run: cargo clippy --workspace --all-features --all-targets -- -D warnings

- name: Save Cargo cache
if: ${{ inputs.rust-cache-save }}
uses: actions/cache/save@v4
with:
path: |
~/.cargo/bin/
~/.cargo/registry/
~/.cargo/git/
target/
key: ${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-clippy-${{ hashFiles('**/Cargo.lock') }}

formatting:
name: Formatting
runs-on: ${{ inputs.run-label }}
Expand All @@ -139,41 +128,11 @@ jobs:
toolchain: ${{ inputs.rust-toolchain-formatting }}
components: rustfmt

- name: Restore Cargo cache
id: cache-restore
uses: actions/cache/restore@v4
with:
path: |
~/.cargo/bin/
~/.cargo/registry/
~/.cargo/git/
target/
key: ${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-formatting-${{ hashFiles('**/Cargo.lock') }}
restore-keys: |
${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-formatting-

- name: Clean target if Cargo.lock changed
if: steps.cache-restore.outputs.cache-hit != 'true'
run: rm -rf target/

- name: Run sccache-cache
if: ${{ inputs.use-sccache == true }}
uses: mozilla-actions/sccache-action@v0.0.4

# `cargo fmt -- --check` does not compile anything, so there is no target/
# or dependency cache to restore here.
- name: Check Formatting
run: cargo fmt -- --check

- name: Save Cargo cache
if: ${{ inputs.rust-cache-save }}
uses: actions/cache/save@v4
with:
path: |
~/.cargo/bin/
~/.cargo/registry/
~/.cargo/git/
target/
key: ${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-formatting-${{ hashFiles('**/Cargo.lock') }}

tests:
name: Unit Tests
runs-on: ${{ inputs.run-label }}
Expand All @@ -189,47 +148,30 @@ jobs:
with:
toolchain: ${{ inputs.rust-toolchain }}

- name: Restore Cargo cache
id: cache-restore
uses: actions/cache/restore@v4
with:
path: |
~/.cargo/bin/
~/.cargo/registry/
~/.cargo/git/
target/
key: ${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-tests-${{ hashFiles('**/Cargo.lock') }}
restore-keys: |
${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-tests-
# Before the cache step so RUSTFLAGS is part of the Swatinem cache key.
- name: Set up mold linker
if: ${{ inputs.use-mold }}
run: |
sudo apt-get update -qq
sudo apt-get install -y --no-install-recommends mold clang
echo "RUSTFLAGS=${RUSTFLAGS:+$RUSTFLAGS }-C linker=clang -C link-arg=-fuse-ld=mold" >> "$GITHUB_ENV"

- name: Clean target if Cargo.lock changed
if: steps.cache-restore.outputs.cache-hit != 'true'
run: rm -rf target/
- name: Rust cache
uses: Swatinem/rust-cache@23869a5bd66c73db3c0ac40331f3206eb23791dc # v2.9.1
with:
prefix-key: ${{ inputs.rust-cache-prefix }}
shared-key: tests
save-if: ${{ inputs.rust-cache-save }}

- name: Install Protoc
if: ${{ inputs.install-protoc == true }}
uses: arduino/setup-protoc@v3
with:
repo-token: ${{ secrets.GITHUB_TOKEN }}

- name: Run sccache-cache
if: ${{ inputs.use-sccache == true }}
uses: mozilla-actions/sccache-action@v0.0.4

- name: Unit Tests
run: cargo test ${{ inputs.test-args }}

- name: Save Cargo cache
if: ${{ inputs.rust-cache-save }}
uses: actions/cache/save@v4
with:
path: |
~/.cargo/bin/
~/.cargo/registry/
~/.cargo/git/
target/
key: ${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-tests-${{ hashFiles('**/Cargo.lock') }}

tests-suites:
name: Tests Suite "${{ matrix.element }}"
if: (inputs.test-suites != '') && (inputs.test-suites != '[]')
Expand Down Expand Up @@ -258,47 +200,30 @@ jobs:
with:
toolchain: ${{ inputs.rust-toolchain }}

- name: Restore Cargo cache
id: cache-restore
uses: actions/cache/restore@v4
with:
path: |
~/.cargo/bin/
~/.cargo/registry/
~/.cargo/git/
target/
key: ${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-tests-suites-${{ hashFiles('**/Cargo.lock') }}
restore-keys: |
${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-tests-suites-
# Before the cache step so RUSTFLAGS is part of the Swatinem cache key.
- name: Set up mold linker
if: ${{ inputs.use-mold }}
run: |
sudo apt-get update -qq
sudo apt-get install -y --no-install-recommends mold clang
echo "RUSTFLAGS=${RUSTFLAGS:+$RUSTFLAGS }-C linker=clang -C link-arg=-fuse-ld=mold" >> "$GITHUB_ENV"

- name: Clean target if Cargo.lock changed
if: steps.cache-restore.outputs.cache-hit != 'true'
run: rm -rf target/
- name: Rust cache
uses: Swatinem/rust-cache@23869a5bd66c73db3c0ac40331f3206eb23791dc # v2.9.1
with:
prefix-key: ${{ inputs.rust-cache-prefix }}
shared-key: tests-suites
save-if: ${{ inputs.rust-cache-save }}

- name: Install Protoc
if: ${{ inputs.install-protoc == true }}
uses: arduino/setup-protoc@v3
with:
repo-token: ${{ secrets.GITHUB_TOKEN }}

- name: Run sccache-cache
if: ${{ inputs.use-sccache == true }}
uses: mozilla-actions/sccache-action@v0.0.4

- name: Test Suite
run: cargo test --test ${{ matrix.element }}

- name: Save Cargo cache
if: ${{ inputs.rust-cache-save }}
uses: actions/cache/save@v4
with:
path: |
~/.cargo/bin/
~/.cargo/registry/
~/.cargo/git/
target/
key: ${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-tests-suites-${{ hashFiles('**/Cargo.lock') }}

unused-dependencies:
name: Unused Dependencies
runs-on: ${{ inputs.run-label }}
Expand All @@ -315,44 +240,19 @@ jobs:
with:
toolchain: ${{ inputs.rust-toolchain-udeps }}

- name: Restore Cargo cache
id: cache-restore
uses: actions/cache/restore@v4
- name: Rust cache
uses: Swatinem/rust-cache@23869a5bd66c73db3c0ac40331f3206eb23791dc # v2.9.1
with:
path: |
~/.cargo/bin/
~/.cargo/registry/
~/.cargo/git/
target/
key: ${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-unused-deps-${{ hashFiles('**/Cargo.lock') }}
restore-keys: |
${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-unused-deps-

- name: Clean target if Cargo.lock changed
if: steps.cache-restore.outputs.cache-hit != 'true'
run: rm -rf target/

- name: Run sccache-cache
if: ${{ inputs.use-sccache == true }}
uses: mozilla-actions/sccache-action@v0.0.4
prefix-key: ${{ inputs.rust-cache-prefix }}
shared-key: unused-deps
save-if: ${{ inputs.rust-cache-save }}

- name: Install cargo-udeps
run: cargo install cargo-udeps@0.1.43 --locked

- name: Check Dependencies
run: cargo udeps --all-targets

- name: Save Cargo cache
if: ${{ inputs.rust-cache-save }}
uses: actions/cache/save@v4
with:
path: |
~/.cargo/bin/
~/.cargo/registry/
~/.cargo/git/
target/
key: ${{ inputs.rust-cache-prefix }}-${{ runner.os }}-cargo-unused-deps-${{ hashFiles('**/Cargo.lock') }}

license:
name: Licenses
runs-on: ${{ inputs.run-label }}
Expand Down
5 changes: 5 additions & 0 deletions .github/workflows/ci.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,10 @@ on:
description: 'Run `sccache-cache` before running rust tests'
type: boolean
default: true
rust-use-mold:
description: 'Use the mold linker for the rust test jobs (opt-in; non-LTO debug builds only)'
type: boolean
default: false
rust-use-postgresql:
description: 'Run postgresql before running rust tests'
type: boolean
Expand Down Expand Up @@ -133,6 +137,7 @@ jobs:
rust-backtrace: ${{ inputs.rust-backtrace }}
install-protoc: ${{ inputs.rust-install-protoc }}
use-sccache: ${{ inputs.rust-use-sccache }}
use-mold: ${{ inputs.rust-use-mold }}
use-postgresql: ${{ inputs.rust-use-postgresql }}
test-env-vars: ${{ inputs.rust-test-env-vars }}
run-label: ${{ inputs.run-label }}
Expand Down
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