claude
eb3f0bd09b
CI / shellcheck + selftests (pull_request) Successful in 1m24s
The step's comment claimed nightly was not optional. CI's own first green run falsified that: 1.100.0-nightly accepts -Z checksum-freshness and resolves freshness by mtime regardless, so the suite's probe reports it and skips the scenario either way. The step stays — twenty seconds, and the coverage returns by itself the day upstream restores the behaviour — but the comment now says that rather than the opposite. The open question about what upstream actually did is daniel/gitdan#62.
99 lines
4.9 KiB
YAML
99 lines
4.9 KiB
YAML
name: CI
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on:
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push:
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branches: [main]
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pull_request:
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branches: [main]
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# Spelled out only to keep `ready_for_review` in the list — naming any type
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# replaces the whole default set, so the other three have to be restated.
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# It is inert on this instance (draft state here is the `WIP:` title
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# prefix, so un-drafting is a title edit and raises no
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# `ready_for_review` action) and costs nothing.
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#
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# The consequence, which is the part that bites: the `if:` guard below is
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# evaluated when a run is CREATED, and un-drafting creates no run. A PR
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# opened as a draft keeps its skip decision until something else produces
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# one. Push an empty commit after un-WIP'ing.
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types: [opened, synchronize, reopened, ready_for_review]
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# gitdan-ci runs four repos' CI on two capacity slots, and the compiler-backed
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# suites below are multi-minute. A superseded run costs a slot in front of
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# somebody's build, so drop it.
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#
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# `push` groups on `github.sha` rather than `github.ref`: a constant per-branch
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# group is what let this Gitea (1.26.0) cancel two of daniel/gitdan's merge
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# runs outright while `cancel-in-progress` was gated away from `push` entirely
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# — see the long note in that repo's ci.yaml for the evidence. Giving every
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# commit its own group leaves that behaviour nothing to act on.
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concurrency:
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group: ${{ github.workflow }}-${{ github.event_name == 'pull_request' && github.ref || github.sha }}
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cancel-in-progress: true
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jobs:
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selftest:
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name: shellcheck + selftests
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# Two clauses, both load-bearing. The second skips draft PRs: Gitea sets
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# draft:true when the title starts with `WIP:`, so work-in-progress pushes
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# cost the shared runner nothing until the PR is un-WIP'd. The first is
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# what keeps that from also skipping pushes to `main` — a `push` event has
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# no `pull_request` context, so `github.event.pull_request.draft` is empty
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# there and the negation alone would be unreliable. Never drop it.
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if: ${{ github.event_name != 'pull_request' || !github.event.pull_request.draft }}
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runs-on: ubuntu-latest
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timeout-minutes: 20
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# Deliberately no `container.volumes:` entry, unlike every repo that
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# CONSUMES this action. The suites below build throwaway workspaces under
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# `mktemp -d` and want a cold target dir every time — a persistent cache
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# would make "did this run rebuild?" unanswerable, which is the question
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# restore-mtimes-selftest.sh exists to ask. So this job takes no share of
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# the shared CI cache disk budget.
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steps:
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- name: Checkout sources
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uses: actions/checkout@v4
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- name: Install shellcheck
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uses: taiki-e/install-action@v2
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with:
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tool: shellcheck
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# `hardlink-clone-selftest.sh` and `restore-mtimes-selftest.sh` drive a
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# real Cargo against a real scratch workspace — they are the only things
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# here that verify the hardlink-aliasing and mtime-freshness behaviour
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# against the compiler rather than against a fixture, and selftest.sh's
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# own header says `--fast` is for iterating, not for signing off a
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# change. So CI installs a toolchain and runs the full set.
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#
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# The scratch workspaces use path dependencies only, so nothing here
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# reaches crates.io.
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# Nightly first, stable second, so stable ends up the default and
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# nightly is only reachable through an explicit `+nightly`.
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#
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# `hardlink-clone-selftest.sh`'s last scenario needs a Cargo that
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# resolves freshness by CONTENT — the mode where the dep-info file
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# carries per-source checksums, which is the mutation that turns a
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# hardlink clone into silent stale-artifact reuse rather than a slow
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# build. As of 1.100.0-nightly (2026-08-25) no nightly provides it:
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# `-Z checksum-freshness` is still accepted and freshness is still
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# resolved by mtime, so the suite's probe reports that by name and skips
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# the scenario. This step therefore buys nothing today and is kept
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# anyway — it costs about twenty seconds, and the day upstream restores
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# the behaviour the coverage comes back with no edit here. See daniel/gitdan#62.
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- name: Install Rust nightly
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uses: dtolnay/rust-toolchain@nightly
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- name: Install Rust toolchain
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uses: dtolnay/rust-toolchain@stable
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# Every script, including the suites themselves. `-x` follows the
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# `. cache-lib.sh` each one sources, which is where most of the logic
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# being checked actually lives; without it shellcheck reports SC1091 and
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# analyses each file with a hole in it.
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- name: shellcheck
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run: shellcheck -x --source-path=scripts scripts/*.sh
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# One command, not six: selftest.sh is the entry point a developer runs,
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# so a suite added there is gated here without a matching edit in this
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# file.
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- name: Selftests
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run: bash scripts/selftest.sh
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