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Add an example for testing a Rust library
No Cargo.lock in the checkout, so the workflow has to generate it first.
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examples.md
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examples.md
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@ -536,6 +536,103 @@ jobs:
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args: --locked
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```
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### Testing a library
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Rust library projects typically [do not put][cargo-faq] `Cargo.lock` under
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version control. It can be generated with the `cargo generate-lockfile` command
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assisted by the registry index cache that is used and possibly updated
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for every workflow run. The same index cache is reused by the test jobs.
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[cargo-faq]: https://doc.rust-lang.org/cargo/faq.html#why-do-binaries-have-cargolock-in-version-control-but-not-libraries
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```yaml
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jobs:
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update-deps:
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runs-on: ubuntu-latest
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outputs:
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crates-io-index-head: ${{ steps.ls-crates-io-index.outputs.head }}
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steps:
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- uses: actions/checkout@v2
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- id: ls-crates-io-index
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name: Get head commit hash of crates.io registry index
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shell: bash
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run: |
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commit=$(
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git ls-remote --heads https://github.com/rust-lang/crates.io-index.git master |
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cut -f 1
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)
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echo "::set-output name=head::$commit"
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- name: Cache cargo registry index
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uses: actions/cache@v2
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with:
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path: ~/.cargo/registry/index
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key: cargo-index-${{ steps.ls-crates-io-index.outputs.head }}
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restore-keys: cargo-index-
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- name: Generate Cargo.lock
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run: cargo generate-lockfile
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- id: cargo-deps
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name: Cache dependency crates
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uses: actions/cache@v2
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with:
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path: ~/.cargo/registry/cache
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key: cargo-deps-${{ hashFiles('Cargo.lock') }}
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- if: ${{ steps.cargo-deps.outputs.cache-hit != 'true' }}
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name: Fetch dependencies
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run: cargo fetch --locked
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- name: Upload Cargo.lock
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uses: actions/upload-artifact@v2
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with:
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name: lockfile
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path: Cargo.lock
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test:
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needs: update-deps
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strategy:
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matrix:
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os: [ubuntu-latest, windows-latest, macos-latest]
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runs-on: ${{ matrix.os }}
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steps:
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- uses: actions/checkout@v2
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- name: Download Cargo.lock
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uses: actions/download-artifact@v2
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with:
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name: lockfile
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- name: Restore cargo registry index
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uses: actions/cache@v2
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with:
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path: ~/.cargo/registry/index
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key: cargo-index-${{ needs.update-deps.outputs.crates-io-index-head }}
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# May miss on Windows:
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# https://github.com/actions/cache/issues/330#issuecomment-637701649
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restore-keys: cargo-index-
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- name: Restore dependency crates
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uses: actions/cache@v2
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with:
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path: ~/.cargo/registry/cache
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key: cargo-deps-${{ hashFiles('Cargo.lock') }}
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- name: Build
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uses: actions-rs/cargo@v1
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with:
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command: build
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args: --all-targets --locked
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- name: Test
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uses: actions-rs/cargo@v1
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with:
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command: test
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args: --locked
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```
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## Scala - SBT
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```yaml
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