Fail a Make target on any failing recipe command, including a pipeline head by leynos · Pull Request #485 · leynos/wildside

leynos · 2026-09-07T02:34:04Z

Summary

Every multi-line Make recipe in this repository has been reporting only its
last command's status. A gate whose tool is not the last command prints its
findings and reports success.

.ONESHELL is a global special target. GNU make ignores its prerequisite
list, so the declaration naming prepare-pg-worker documents which recipe
needed one-shell recipes but turns them on for the whole file. Every
multi-line recipe therefore reaches the shell as a single script, and under
make's default .SHELLFLAGS of -c that script's status is its last
command's status. Earlier failures are discarded.

.SHELLFLAGS := -eo pipefail -c fixes both halves of this, and neither option
covers the other:

-e aborts at the first failing command, catching a tool that is not the
recipe's last line.
-o pipefail gives a pipeline the status of its first failing stage.
Without it a failure at a pipeline's head is discarded exactly as
before, and this Makefile pipes into the tool that does the checking:
spelling feeds git ls-files into typos, and lint-actions feeds find
into yamllint and actionlint. A head that dies produces an empty list, and
the gate passes having examined nothing.

-c stays last: make appends the recipe as the shell's command string.

The pipeline half was raised by the review round on lille #345. The branch is
still named for the earlier -ec spelling; renaming it closes this pull
request, which GitHub does rather than retargeting it, so the name stays.

Evidence that the hole was live

Run 33939820204 went green with make lint-python printing Ruff findings.

Separately, make lint-openapi had been passing for a week over three
expired review-by annotations in .redocly.lint-ignore.yaml. The checker
that enforces those dates, scripts/check_redoc_ignore.py, is not the last
command in that recipe.

The clearest evidence arrived later, on #488, a branch cut from main and so
without this fix. make lint-python reported success there while Ruff printed
six errors. Three of them were then raised by CodeRabbit as review findings on
the same commit: the gate had been shown the defects and discarded them, and a
reviewer caught what the gate threw away. Until this merges, no gate verdict
from a branch off main can be trusted, and the tools have to be run
directly.

What the flag surfaced, and what was done about it

Three Ruff findings. An unused pathlib import in
cache_ownership_test.py; PT018 and E501 in
tool_installation_test.py. The PT018 assertion conflated "the Makefile
invokes cargo binstall at all" with "every invocation carries --force",
so an empty list reported a missing flag. Split.
Two workflow-contract failures. Both asserted the command doubles saw
an empty TMPDIR. Nothing in the Makefile touches TMPDIR, so that read
the ambient environment: it held on GitHub's runners, which set none, and
failed on any developer machine that sets one. The fixture now owns a
TMPDIR and both contracts assert the tools receive exactly that value, so
the claim is about the Makefile rather than about who ran the suite.
scripts/makefile-audit.test.mjs. Clear the September 2026 advisory backlog #473 added
--ignore RUSTSEC-2026-0258 without updating the suite. Both ignores stay;
the expected command is now a named constant used by all three assertions.
Two of them used toContain and matched the first ignore alone, so dropping
the second passed them. Against the full command a dropped suppression fails
all three.
Three expired Redocly exceptions. Reviewed rather than renewed, and all
three turn out to be obsolete. The specification now declares a server, /,
so no-empty-servers has nothing to catch, and both health probes document
a 405 alongside 200 and 503, so operation-4xx-response is satisfied.
Redocly lints the specification cleanly with no exceptions at all. Emptying
servers still trips no-empty-servers, so the rule is live and the
exception was spent rather than load-bearing. The two remaining warnings are
the unused component schemas tracked in Drop the two unused query component schemas from the OpenAPI specification #484.

The four fixes land before the flag, so no commit in this branch sits on a
red tree.

The lint-actions recipe becomes a script

The flag is the floor, not the whole story. Two shapes lose a command's status
on their own, and lint-actions had both: action-validator in a loop over
composite actions, where the loop reports its last iteration's status, and
find | xargs yamllint followed by find | xargs actionlint in one if,
where the second's status replaces the first's.

|| exit 1 guards were the interim answer. The estate's scripting standards
say gate logic of this size does not belong in a recipe at all, so the recipe
now invokes scripts/lint_actions.py as one command. The script builds the
list of invocations first and runs them in one loop, which makes "the first
failure wins" a property of four lines rather than of control flow spread
through a shell fragment. It names the tool the reader cares about rather than
the one that ran it, since yamllint arrives through uvx.

scripts/tests/test_lint_actions.py places a failing tool first, a failing
tool last, and no failing tool at all, with cmd-mox supplying the
executables. The plan's ordering is asserted separately, because without it
"the first tool failed" is not a claim the failure tests can make.

The contract changes shape with the recipe. Instead of asserting each
invocation carries a guard, it asserts the recipe runs exactly one command
besides its tool checks, that the command invokes the script with the yamllint
pin, and that it contains no while, ;, && or ||. The shell probes for
the guarded shapes retire; what they stood in for is now tested directly.

The repository's first cuprum script

docs/scripting-standards.md names cuprum as the process runner and carries a
"Migration guidance (plumbum → cuprum)" section, so new scripts use it. The
three existing plumbum scripts, local_k8s.py, rotate_session_key.py and
local_k8s/commands.py, are that migration's work and are untouched here.
cuprum and cmd-mox are pinned in the Makefile beside plumbum.

Findings, all reported upstream

Recorded in the developers' guide so the next script does not rediscover them.

Scripting standards: copies disagree on the process runner, and the cuprum examples do not match the shipped API concordat#154. The scripting standard documents
Catalogue.from_programs(...) and sh.scoped(CATALOGUE); neither exists in
cuprum 0.1.0, so this script could not be written from the document. The
shipped shape is a ProgramCatalogue built from a ProjectSettings, passed
to sh.make, with names wrapped in Program. The issue also records that
the estate's copies of that document disagree about the runner: concordat's
says plumbum throughout, wildside's says cuprum.
Shim waits indefinitely when the server rejects its payload, ignoring CMOX_IPC_TIMEOUT cmd-mox#249. A shim occasionally stalls instead of returning,
with the server logging IPC received malformed JSON, and ignores its own
CMOX_IPC_TIMEOUT while it waits, so the symptom is a run that never
finishes. I first blamed the layered uv run --with environment and was
wrong; the issue records the disproof and now asks for a bounded wait, which
is the fix worth having whatever the underlying race is.
make test-lint-actions uses a materialized virtual environment, where the
suite has been stable. The issue also notes that the fixture enters replay
itself, so the documented explicit replay() needs
@pytest.mark.cmd_mox(auto_lifecycle=False).
lading dogfooding feedback cuprum#361. Consumer feedback: what worked, plus three small
ergonomics points. Nothing here was blocked by cuprum.

Cuprum needed nothing this script could not do. run_sync(capture=True, echo=True) streams a linter's output while keeping stderr for the failure
message, which is exactly what a gate wants.

Recipe audit## Recipe audit

No recipe relies on a non-zero intermediate status. Every tolerated failure
already sits inside an if, a ||, or a captured status, and no recipe line
carries make's - prefix, so nothing needed weakening. A recipe that later
needs a command to be allowed to fail should say so itself rather than have
this flag weakened for it; the Makefile header and the developers' guide both
say so.

The contract

tests/workflow_contracts/makefile_failure_propagation_test.py copies the
repository's real SHELL, .SHELLFLAGS and .ONESHELL lines into a scratch
Makefile alongside two probe recipes, drives GNU make over each, and asserts
the target fails. It measures the mechanism rather than describing it.

earlier-line fails on a line that is not the last. Only -e catches it.
pipeline-head fails in a pipeline's first stage while its last stage
succeeds. Only -o pipefail catches it.

Both probes end on a command that succeeds, so a probe that passes is one
whose status came from the wrong command.

Each probe is mutation-proved against the half-measure that masks it, which is
what stops anyone simplifying the flag to one option later:

Substituted flag	Probe that then passes
`-ec`	`pipeline-head`
`-o pipefail -c`	`earlier-line`

A further case removes the .SHELLFLAGS line entirely and pins make's default
behaviour. One more asserts the copied prologue still declares .ONESHELL,
without which make runs each line in its own shell and both probes would pass
under any flags at all.

Applying each mutation to the repository Makefile itself fails the contract:
-ec fails the declaration check and pipeline-head, -o pipefail -c fails
the declaration check and earlier-line, and -c fails all three. The
.ONESHELL behaviour was verified separately against GNU Make 4.4.1 before
any of this was written.

Documentation

The developers' guide gains "How a Makefile recipe reports failure": the three
settings in a table, why .ONESHELL makes .SHELLFLAGS load-bearing, what
each of the two options catches that the other does not, run 33939820204 as
the evidence, the rule about tolerated failures, and what the contract proves.

It does not offer make's - line prefix as an escape hatch. Under .ONESHELL
that prefix applies to the first recipe line only, so on any later line it
silently does nothing.

Validation

All run under the new flag, so each verdict is one the recipe could not have
faked:

make lint-python, make check-fmt-python, make check-fmt,
make typecheck, make markdownlint, make spelling, make nixie,
make yamllint, make lockfile, make lint-actions, make lint-asyncapi,
make lint-openapi, make lint-specs, make lint-frontend,
make lint-makefile: pass.
make test-workflow-contracts: 111 passed, plus make test-lint-actions: 6 passed.
make test-scripts: 107 passed.
make test-frontend: 90 root, 43 frontend workspace, tokens contrast
checks.
make lint-clippy, make lint-whitaker, make lint-architecture and
RUSTDOCFLAGS="-D warnings" cargo doc --workspace --no-deps: pass. The
branch has no Rust, Cargo.lock or Cargo.toml delta against main.

Summary by Sourcery

Make all Makefile quality gates report failures reliably and move workflow lint sequencing into a tested script.

New Features:

Add a dedicated script and test suite for reliable composite-action and workflow linting with first-failure propagation.
Add CI coverage for the workflow lint script tests.

Bug Fixes:

Ensure Make recipes fail on earlier command failures and failures at the head of pipelines.
Remove obsolete Redocly ignore exceptions and correct workflow, tooling, and audit contract tests exposed by stricter failure handling.

Enhancements:

Strengthen Makefile and workflow contracts to verify failure propagation, unconditional gate execution, exact tool invocations, and dependency handling.
Document Make recipe failure semantics, tolerated failures, and scripting guidance for lint gates.

Build:

Configure Bash with -e and pipefail for one-shell Make recipes and pin cuprum and cmd-mox dependencies.

Documentation:

Document the Makefile failure-propagation contract and the migration considerations for the new cuprum-based lint script.

Tests:

Add behavioral and mutation-proven tests for Make failure propagation and workflow lint ordering and exit status.
Expand workflow, Makefile tooling, audit, and dependency contract coverage.

Chores:

Review and remove expired Redocly exceptions that are no longer needed.

`make lint-python` has been printing these while exiting zero, because the Makefile's global `.ONESHELL` gives a recipe its last command's status and Ruff is not the last command. The next commit closes that hole, so these have to go first or it lands on a red tree. `cache_ownership_test.py` imported `pathlib` and never used it. `tool_installation_test.py` conflated two claims in one assertion: that the Makefile invokes `cargo binstall` at all, and that every invocation carries `--force`. Split, an empty list now says "no invocation found" rather than reporting a missing flag. The other finding is a long line, rewrapped.

Two contracts asserted the command doubles saw an empty `TMPDIR`. Nothing in the Makefile sets or clears `TMPDIR`, so that assertion was reading the ambient environment: it held on GitHub's runners, which set none, and failed on any developer machine that does. The suite reported a Makefile defect that did not exist. The fixture now owns a `TMPDIR` under the test's own temporary directory and both contracts assert the tools receive exactly that. The claim becomes "the Makefile passes the caller's TMPDIR through untouched", which is about the Makefile rather than about whoever ran the suite, and it holds with `TMPDIR` unset, set to the fixture's value, or set to anything else.

#473 added `--ignore RUSTSEC-2026-0258` to `CARGO_AUDIT_IGNORES` without updating this suite, so its exact-match assertion has been failing since. `make test-frontend` runs `pnpm run test` before `pnpm run test:workspaces` and the Makefile's global `.ONESHELL` hands the target the last command's status, so the failure never reached the gate. Both ignores stay. Each is justified in the Makefile's header comment with its own review date, and RUSTSEC-2026-0258 has no patched release for actix-http's h2 dependency. The expected command is now a named constant used by all three assertions. The two that used `toContain` matched only the first ignore, so dropping the second passed them; against the full command a dropped suppression fails all three.

All three carried `review by: 2026-08-31`, which passed a week ago. `scripts/check_redoc_ignore.py` has been reporting them, but it is not the last command in the `lint-openapi` recipe and the Makefile's global `.ONESHELL` hands the target the last command's status, so the gate stayed green over an expired exception. The review the date was demanding finds all three obsolete rather than due for renewal: - `no-empty-servers` on `#/servers`: the specification now declares a server, `/`, described as relative to the deployment base URL. - `operation-4xx-response` on both health probes: each documents a 405 alongside 200 and 503, so each carries a 4xx response. Redocly lints the specification cleanly with no exceptions at all, and emptying `servers` still trips `no-empty-servers`, so the rule is live and the exception was simply spent. The two remaining warnings are the unused component schemas tracked in #484. The `spec/openapi.json` key stays, because the recipe asserts the specification has an entry here, and the file gains a header recording what the exceptions were and why they went.

`.ONESHELL` is a global special target: GNU make ignores its prerequisite list, so the declaration naming `prepare-pg-worker` documents which recipe needed one-shell recipes but turns them on for the whole file. Every multi-line recipe reaches the shell as a single script, and under make's default `.SHELLFLAGS` of `-c` that script's status is its last command's status. Every earlier failure is discarded. The symptom is the worst one a gate can have. Run 33939820204 went green with `make lint-python` printing Ruff findings, and `make lint-openapi` passed for a week over an expired review-by annotation, because in each recipe the failing tool was not the last command. The four commits before this one clear everything the flag surfaces, so it lands on a green tree. `.SHELLFLAGS := -ec` makes the shell abort at the first failing command. The `c` stays: make passes the recipe to the shell as a command string. No recipe in this Makefile relies on a non-zero intermediate status; every tolerated failure is already inside an `if`, a `||`, or a captured status, and no recipe line carries make's `-` prefix. A recipe that later needs a command to be allowed to fail should say so itself rather than have this flag weakened for it. `makefile_failure_propagation_test.py` holds the contract. It builds a scratch Makefile from the repository's own prologue lines plus a probe target whose first line fails and last line succeeds, drives GNU make over it, and asserts the target fails. A companion test removes the `.SHELLFLAGS` line from that same prologue and asserts the identical probe passes, so the first test's verdict is attributable to the flag and not to a mistake in the probe. A third pins the assumption the whole thing rests on, that `.ONESHELL` applies to targets it does not name. Deleting the flag fails the contract; weakening it to `-c` fails both the declaration check and the behavioural probe, the latter reporting exit 0 with the probe's failing line having run.

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sourcery-ai · 2026-09-07T02:34:23Z

Reviewer's Guide

The PR makes .SHELLFLAGS := -ec load-bearing for the repository’s global .ONESHELL configuration, adds executable contracts and documentation for failure propagation, and fixes the lint, workflow-contract, audit, and OpenAPI issues surfaced when the stricter behavior is enabled.

Sequence diagram for Make recipe failure propagation

sequenceDiagram
    participant Make
    participant Bash
    participant Gate as Failing gate
    participant Followup as Later command
    Make->>Bash: Run one-shell recipe with -ec
    Bash->>Gate: Execute first recipe command
    Gate-->>Bash: Non-zero status
    Bash-->>Make: Abort recipe and return failure
    Note over Followup: Not executed

Flow diagram for Makefile failure-propagation contract

flowchart TD
    A[Build scratch Makefile from repository prologue] --> B[Add probe target: failing line then succeeding line]
    B --> C[Run GNU make]
    C --> D{Does target fail?}
    D -->|Yes| E[Contract passes]
    D -->|No| F[Contract fails]
    G[Remove or weaken .SHELLFLAGS] --> C

File-Level Changes

Change	Details	Files
Make failures from any line in multi-line Make recipes propagate to the target.	Set `.SHELLFLAGS := -ec` so one-shell recipes stop at the first failure while retaining command-string execution. Document the interaction between `SHELL`, `.SHELLFLAGS`, and global `.ONESHELL`, including how tolerated failures must be explicit. Add mutation-proved contract tests using scratch Makefiles to verify declaration, behavior, `.SHELLFLAGS` removal, and global `.ONESHELL` semantics.	`Makefile` `tests/workflow_contracts/makefile_failure_propagation_test.py` `docs/developers-guide.md`
Remove obsolete Redocly exceptions and preserve a validated ignore-file contract.	Delete the three expired exceptions after confirming the specification now satisfies the relevant rules. Retain the `spec/openapi.json` entry with explanatory review guidance. Update audit expectations to require the complete cargo-audit command, including both advisory suppressions.	`.redocly.lint-ignore.yaml` `scripts/makefile-audit.test.mjs`
Fix and harden workflow contract tests exposed by strict failure propagation.	Remove an unused import and fix Ruff findings in workflow tests. Make the temporary-directory fixture explicit so command contracts validate Makefile propagation rather than ambient environment state. Separate the cargo-binstall presence assertion from its `--force` argument assertion.	`tests/workflow_contracts/cache_ownership_test.py` `tests/workflow_contracts/makefile_tooling_test.py` `tests/workflow_contracts/tool_installation_test.py`

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coderabbitai · 2026-09-07T02:35:19Z

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Summary

Configure Make recipes to fail on command and pipeline errors with .SHELLFLAGS := -eo pipefail -c and .ONESHELL.
Move workflow lint logic to tested scripts/lint_actions.py.
Add tests for lint ordering, failure propagation, command construction, and Make failure semantics.
Run workflow lint tests in CI with pinned cuprum and cmd-mox dependencies.
Update workflow fixtures, cargo-audit checks, and tool-installation assertions.
Remove obsolete Redocly lint exceptions and fix related lint issues.
Document Make failure handling and explicitly tolerated failures.

Walkthrough

The change configures Make to propagate recipe and pipeline failures, adds a Python workflow-lint runner and its tests, integrates the runner into Make and CI, removes obsolete Redocly exceptions, and strengthens workflow and audit contracts.

Changes

Make and workflow reliability

Layer / File(s)	Summary
Configure Make failure propagation `Makefile`, `tests/workflow_contracts/makefile_failure_propagation_test.py`, `docs/developers-guide.md`	Configure `.SHELLFLAGS` with `-e`, `-o pipefail`, and `-c`. Document and test global `.ONESHELL` behaviour and failure propagation.
Add the workflow lint runner `scripts/lint_actions.py`, `scripts/tests/test_lint_actions.py`	Discover workflow files, plan lint commands in a fixed order, run them through cuprum, and stop at the first failure. Test success, ordering, version propagation, and failure handling.
Wire lint testing into Make and CI `Makefile`, `.github/workflows/ci.yml`, `tests/workflow_contracts/makefile_tooling_test.py`, `tests/workflow_contracts/ci_workflow_test.py`, `.gitignore`, `.markdownlint-cli2.jsonc`	Add pinned lint-test dependencies, a dedicated virtual environment, aggregate Make integration, CI execution, and generated-environment ignores.
Update workflow and audit contracts `.redocly.lint-ignore.yaml`, `scripts/makefile-audit.test.mjs`, `tests/workflow_contracts/tool_installation_test.py`	Remove obsolete Redocly exceptions, validate both cargo-audit suppressions, require a standalone `--force` argument, and preserve diagnostic content.

Sequence Diagram(s)

sequenceDiagram
  participant CI
  participant Make
  participant LintActions
  participant Cuprum
  participant LintTools
  CI->>Make: Run make test-lint-actions
  Make->>LintActions: Run scripts/lint_actions.py
  LintActions->>Cuprum: Execute ordered lint commands
  Cuprum->>LintTools: Run configured tools
  LintTools-->>Cuprum: Return status
  Cuprum-->>LintActions: Return result
  LintActions-->>Make: Return lint status
  Make-->>CI: Report test result

Poem

Make stops when commands fail,
Lint tools run in ordered flight.
Contracts guard each shell detail,
CI checks the path is right.
Stale exceptions fade from sight.

Merge Risk: 🟡 Moderate · up to b91db

Resolve the GNU Make prerequisite and strengthen the CI test command contract before merging so developer-platform contract tests remain valid and workflow-lint tests cannot be silently skipped.

Caution

Pre-merge checks failed

Please resolve all errors before merging. Addressing warnings is optional.

Ignore

❌ Failed checks (3 errors, 1 warning)

Check name	Status	Explanation	Resolution
Testing (Overall)	❌ Error	The new `scripts/lint_actions.py` has substantive tests for `plan()` and `lint()`, including first-tool failure, final-tool failure, ordering, and success. However, the tests never call `main()` or th…	Add an end-to-end CLI test, or a direct `main()` test with command doubles, that runs a failing linter and asserts the process exits with the linter's non-zero status and reports the tool and error detail. Add focused tests for the document…
Testing (Unit And Behavioural)	❌ Error	The tests cover useful local behaviour: plan ordering, an empty repository, version propagation, first/last tool failures, successful execution, and real GNU Make shell failure propagation. However, t…	Add an end-to-end test that runs `scripts/lint_actions.py` with its real CLI arguments against a temporary repository and controlled executable doubles. Assert success, linter failure, exit status, error reporting, and command order. Use at…
Unit Architecture	❌ Error	Fail this check. The new `scripts/lint_actions.py` hides fallibility and hard-codes effectful dependencies. `plan()` is presented as a planning query, but it performs filesystem discovery through `Pat…	Split filesystem discovery from pure invocation planning. Make discovery return an explicit success/error result or raise a typed discovery error, distinguish a missing directory from an inaccessible directory, and handle that error at the …
Testing (Property / Proof)	⚠️ Warning	The pull request introduces an invariant over an unbounded set of action manifests and workflow files: `plan()` must preserve the defined order, and `lint()` must stop at the first failing invocation.…	Add a Hypothesis property test for `scripts/lint_actions.py`. Generate varying numbers and names of action manifests and workflow files, plus a failure position or status sequence. Assert that `plan()` produces the documented stable order a…

✅ Passed checks (11 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 35 functions across 7 files. (5 skipped: 5…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
User-Facing Documentation	✅ Passed	Pass. Treat this change as contributor tooling, not user-facing product behaviour. The PR changes Make failure propagation, CI linting, tests, and the internal `scripts/lint_actions.py` utility. It ch…
Developer Documentation	✅ Passed	Pass the developer-documentation check. The changed `docs/developers-guide.md` documents `.SHELLFLAGS`, `.ONESHELL`, `pipefail`, tolerated failures, the `lint-actions` script boundary, Cuprum and cmd-…
Module-Level Documentation	✅ Passed	PASS — All changed Python modules have module-level docstrings. The new `scripts/lint_actions.py` docstring explains its purpose, execution utility, failure behaviour, and replacement of the Makefile …
Testing (Compile-Time / Ui)	✅ Passed	Pass the check. The diff changes no Rust, TypeScript, or TSX source, so the compile-time trybuild or language-specific test requirement is not applicable. The new Python script emits diagnostic skip m…
Domain Architecture	✅ Passed	The pull request adds tooling, Makefile configuration, tests, documentation, and lint configuration. It does not add or modify domain model, domain service, repository, adapter, transport, persistence…
Observability	✅ Passed	Pass the Observability check. The changes affect local and CI quality gates, not production service behaviour. `scripts/lint_actions.py` reports missing directories, streams linter output, and reports…
Title check	✅ Passed	The title accurately describes the main change: Make targets now fail on recipe-command failures, including failures at the head of a pipeline.
Description check	✅ Passed	The description clearly explains the Make failure-handling changes, the lint-actions script migration, related fixes, tests, CI updates, documentation, and validation.

Full details: Testing (Overall)

Explanation

The new scripts/lint_actions.py has substantive tests for plan() and lint(), including first-tool failure, final-tool failure, ordering, and success. However, the tests never call main() or the CLI entry point. The Makefile now runs the script through that entry point, and main() converts LintError into the process exit status that makes the gate fail. An implementation that catches or ignores the error in main() could therefore make make lint-actions pass while all six new tests still pass. The tests also do not cover the documented missing-directory diagnostics or the workflow-file discovery cases.

Resolution

Add an end-to-end CLI test, or a direct main() test with command doubles, that runs a failing linter and asserts the process exits with the linter's non-zero status and reports the tool and error detail. Add focused tests for the documented missing-directory behaviour and workflow/action discovery, including the relevant file suffixes and multiple files. Keep the existing lint() tests to verify ordering and short-circuiting, and run the expanded suite through test-lint-actions in CI.

Full details: Testing (Unit And Behavioural)

Explanation

The tests cover useful local behaviour: plan ordering, an empty repository, version propagation, first/last tool failures, successful execution, and real GNU Make shell failure propagation. However, the changed code adds a command-line script and changes the Make workflow to invoke it. No test invokes scripts/lint_actions.py through its main/cyclopts CLI or through the Make recipe. The new suite calls plan() and lint() directly and mocks all external commands with cmd_mox; the repository fixture also creates only one action manifest, so it does not exercise the earlier action-validator loop failure path. The static Make and CI contract checks do not replace this behavioural boundary test.

Resolution

Add an end-to-end test that runs scripts/lint_actions.py with its real CLI arguments against a temporary repository and controlled executable doubles. Assert success, linter failure, exit status, error reporting, and command order. Use at least two composite action manifests so the first action-validator failure proves that later validators do not run. Add a Make-level integration contract, or extend the CLI test to run the exact command shape used by lint-actions, so the Make recipe, CLI parsing, dependency resolution boundary, and failure status are tested together.

Full details: Testing (Property / Proof)

Explanation

The pull request introduces an invariant over an unbounded set of action manifests and workflow files: plan() must preserve the defined order, and lint() must stop at the first failing invocation. The new tests use one action and one workflow, then cover only the first and final tool failures. They do not cover varying collection sizes, intermediate failure positions, or generated ordering cases. No new Hypothesis, fast-check, proptest, or bounded-model property test covers this range. The Makefile flag contract is a small, complete two-option table and does not require a property test.

Resolution

Add a Hypothesis property test for scripts/lint_actions.py. Generate varying numbers and names of action manifests and workflow files, plus a failure position or status sequence. Assert that plan() produces the documented stable order and that lint() executes only the prefix through the first failure, reports that tool and status, and executes all invocations when every status is successful. Keep the existing example tests for the key first and final failure cases.

Full details: Unit Architecture

Explanation

Fail this check. The new scripts/lint_actions.py hides fallibility and hard-codes effectful dependencies. plan() is presented as a planning query, but it performs filesystem discovery through Path.rglob() and Path.glob() and returns an empty plan when directories are missing or unreadable. lint() then reports success. The API has no explicit discovery error and main() does not handle filesystem errors. _run() also reaches the module-global CATALOGUE and cuprum.sh directly, so the process runner is not injectable. The repository's own scripting guidance requires injection at the catalogue boundary and documents UnknownProgramError, but main() catches only LintError. These behaviours were introduced by replacing the Makefile shell logic with this script, so the pull request causes the architecture violation.

Resolution

Split filesystem discovery from pure invocation planning. Make discovery return an explicit success/error result or raise a typed discovery error, distinguish a missing directory from an inaccessible directory, and handle that error at the CLI boundary. Inject a narrow command-runner dependency, including the Cuprum catalogue or adapter, into the execution function instead of reading the module-global runner directly. Translate UnknownProgramError, executable lookup errors, and other execution failures into the declared LintError at the command boundary. Add tests for inaccessible discovery and unavailable tools, plus tests that use the injected runner.

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In `@docs/developers-guide.md`:
- Around line 1020-1024: Add a short descriptive caption immediately before the
settings table containing SHELL, .SHELLFLAGS, and .ONESHELL, without changing
the table content.

In `@tests/workflow_contracts/makefile_tooling_test.py`:
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`-ec` alone was half a fix. It aborts at the first failing command, which catches a tool that is not the recipe's last line, but a pipeline still reports its LAST stage's status, so a failure at the head is discarded exactly as before. That is not hypothetical here. This Makefile pipes into the tool that does the checking: `spelling` feeds `git ls-files` into typos, and `lint-actions` feeds `find` into yamllint and actionlint. A head that dies produces an empty list, and the gate passes having examined nothing. `-o pipefail` gives a pipeline its first failing stage's status. Neither option covers the other, so both are needed and neither can be dropped. The contract now drives two probes. `earlier-line` fails on a line that is not the last; `pipeline-head` fails in a pipeline's first stage while its last stage succeeds. Each is mutation-proved against the half-measure that masks it: with `-ec` alone `pipeline-head` passes, and with `-o pipefail -c` alone `earlier-line` passes. A third case asserts the copied prologue still declares `.ONESHELL`, without which make would run each line in its own shell and both probes would pass under any flags. The guide no longer offers make's `-` line prefix as an escape hatch for a recipe that needs a tolerated failure. Under `.ONESHELL` it applies to the first recipe line only, so on any later line it silently does nothing. Reported by the review round on lille #345.

Match `--force` as a whole argument. The comment above the assertion already warned that `--force-exclude` elsewhere in the Makefile would satisfy a search for the flag, and then the assertion did exactly that search. Splitting the line into arguments makes the check match the rule it serves: rewriting the invocation to `--force-exclude` now fails the contract, where before it passed. Give `_make` a single-line docstring, per the numpy convention for private helpers, and move its rationale to a comment above the definition. Caption the settings table. The documentation style guide puts the caption below the table, so it goes there rather than above it.

Two shapes in this recipe lose a command's status without help, and both are invisible in the output. `action-validator` runs once per composite action, so an earlier iteration's failure is replaced by the last one's status; the loop is dead today with no `.github/actions` directory and goes live the day one appears. The workflows branch runs `find | xargs yamllint` and then `find | xargs actionlint` inside one `if`, where the second's status replaces the first's. `.SHELLFLAGS`'s `-e` covers both today. Each invocation carries `|| exit 1` anyway: the guard states the intent where the reader meets it, and it survives a future change to the flag that these shapes would not. Three contracts hold it, because no single one can. A static assertion requires every linter invocation in the recipe to carry a guard, and dropping any one of the three fails its own case. A behavioural pair drives the real recipe with a failing first linter and a passing second, with the all-passing case beside it so a failure is attributable. A probe in `makefile_failure_propagation_test.py` switches `-e` off with `set +e` and measures the guard alone, since no behavioural test can tell the guard and the flag apart while both are present; its unguarded twin must still pass, or the probe is measuring something else. Reported by env-wildside's loop audit.

The `|| exit 1` guards were interim. The estate's scripting standards say gate logic of this size does not belong in a recipe at all, and this recipe had two shapes that lose a command's status: `action-validator` in a loop over composite actions, and `find | xargs yamllint` followed by `find | xargs actionlint` in one `if`. Guards paper over both; a script removes them. `scripts/lint_actions.py` builds the list of invocations first and runs them in one loop, so "the first failure wins" is a property of four lines rather than of control flow spread through a shell fragment. It reports the tool the reader cares about rather than the one that ran it: yamllint arrives through `uvx`, and naming `uvx` would send them to the wrong place. The recipe is now one command. `scripts/tests/test_lint_actions.py` places a failing tool first, a failing tool last, and no failing tool at all, with cmd-mox supplying the executables. The plan's ordering is asserted separately, since without it "the first tool failed" is not a claim the failure tests can make. The contract over the recipe changes shape with it: instead of asserting each invocation carries a guard, it asserts the recipe runs exactly one command besides its tool checks, that the command invokes the script with the yamllint pin, and that it contains no `while`, `;`, `&&` or `||`, any of which would reintroduce the defect. The shell probes for the guarded shapes retire; the ordering they stood in for is now tested directly. Two things this turned up, both recorded in the guide for the next script. cuprum 0.1.0 has no `Catalogue.from_programs`, which is what `docs/scripting-standards.md` shows; a `ProgramCatalogue` is built from a `ProjectSettings` and passed to `sh.make`, and program names are the `Program` type rather than plain strings. And cmd-mox needs an interpreter that can import it on the shim's PATH, which a layered `uv run --with` environment is not: the shim hangs rather than failing. `test-lint-actions` builds a materialized virtual environment instead, as `typecheck-python` does, which is also why the new dependencies join the typecheck set.

The script relayed both captured streams after each tool finished, which made a slow linter look hung and reordered its output against the script's own messages. `run_sync(echo=True)` mirrors them as the tool writes them, and capture stays on so a failure can still quote stderr. The skip notices are flushed for the same reason: cuprum's echo writes to the file descriptor directly while print buffers, so without a flush the notice arrived after the output it introduces. The guide records that this is the repository's first cuprum script, that the three plumbum scripts are the migration the standard anticipates, and the two upstream reports this work produced: leynos/concordat#154 for the standard's examples not matching cuprum's shipped API, and leynos/cmd-mox#249 for the shim hanging rather than failing.

The comment and the guide both blamed the layered `uv run --with` environment, saying the shim could not import cmd_mox there. That is wrong. The shim's shebang resolves `python3` to the layered interpreter, both `CMOX_IPC_SOCKET` and `CMOX_IPC_TIMEOUT` reach the child, and the same invocation passes repeatedly; two other repositories run cmd-mox under layered environments without trouble. What is real is a stall that appears under load, always alongside the server logging `IPC received malformed JSON`, with the shim ignoring its own `CMOX_IPC_TIMEOUT` while it waits. Three consecutive runs stalled while the machine was busy compiling; three later runs of the same file passed. The target still builds a materialized virtual environment, because that is where the suite has been stable and `typecheck-python` already needs one, but the reason is now stated as the observation it is rather than as a cause I had not tested. leynos/cmd-mox#249 carries the disproof and asks for a bounded wait, which is the fix worth having whatever the race is.

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Inline comments:
In `@scripts/lint_actions.py`:
- Line 6: Add the applicable NumPy-format docstring sections to the public
module and the public symbols LintError, Invocation, plan, lint, and main,
documenting only their relevant parameters, return values, raised exceptions,
attributes, and examples; preserve existing behavior and avoid adding irrelevant
sections.

In `@tests/workflow_contracts/ci_workflow_test.py`:
- Line 165: Update the test assertions around invocations[0] to require its run
value to equal exactly "make test-lint-actions", while retaining the existing
assertion that rejects an "if" condition.

In `@tests/workflow_contracts/makefile_failure_propagation_test.py`:
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Require the CI step's whole `run` value to be the command. A per-line search is satisfied by a step that wraps the command in `if false; then ... fi` and runs nothing, which is worse than no contract: this one exists because the suite it guards would otherwise never run on a pull request. The `if` key assertion stays, since the two catch different things, a YAML-level condition and a shell-level one. Rewriting the step into a false guard now fails the contract. Require GNU Make in the failure-propagation contract. `.ONESHELL` is a GNU extension, so under a non-GNU make the probe targets run line by line and the whole contract passes while measuring nothing; a green run would have been indistinguishable from a correct one. The helper prefers `gmake`, falls back to `make`, and accepts a candidate only when `--version` begins with `GNU Make`. Give the script's public interfaces their NumPy sections: `Parameters` and `Attributes` on `LintError`, `Attributes` on `Invocation`, `Parameters` and `Returns` on `plan`, `Parameters` and `Raises` on `lint`, `Raises` on `main`. The private helpers keep single-line summaries with their rationale in adjacent comments, which is the same instruction read the other way. Annotate `TMPDIR_SENTINEL`.

Three pre-merge rows, all fair. `plan` was presented as a query but walked the filesystem, and an unreadable directory yielded nothing exactly as an absent one does. That is this pull request's own defect one level down: a gate that reports success having examined nothing. `discover` now does the walking and raises `DiscoveryError` when a directory exists but cannot be listed, while an absent directory still yields nothing, because a repository with no composite actions is normal. `plan` is left a pure function of its inputs, which is what lets the ordering be asserted without a filesystem. The listing failure is caught both when it starts and while it is consumed, since `rglob` can raise at either point depending on the failure. Nothing tested `main`. Every test drove `lint`, so a script that detected a failure and exited zero would have passed all of them. Two cases now drive the entry point: a failing linter must exit with that linter's own status and name it on stderr, and an all-passing run must exit quietly. Two property tests cover the invariants stated over an unbounded set, which fixed fixtures cannot show: `plan` orders any number of surfaces the same way, and `lint` stops at whichever invocation fails. The second drives the real loop with a substituted runner rather than reimplementing it, and patches through a context because Hypothesis will not reuse a function-scoped fixture across examples.

leynos · 2026-09-07T17:14:49Z

@coderabbitai All four pre-merge rows are actioned in 32e4b6c. Three errors and the warning; I have taken the warning as actionable too.

Unit Architecture. Valid, and the sharpest of the four. plan was presented as a query and walked the filesystem, and an unreadable directory yielded nothing exactly as an absent one does. That is this pull request's own thesis one level down: a gate reporting success having examined nothing.

discover now does the walking and returns a Surfaces value; plan is a pure function of it, which is what lets the ordering be asserted without a filesystem at all. A missing directory still yields nothing, because a repository with no composite actions is normal, but a directory that exists and cannot be listed raises DiscoveryError and exits non-zero. The two are no longer the same outcome.

One detail worth recording: the listing failure is caught both when it starts and while it is consumed, because Path.rglob can raise at either point. Catching only one leaves the other silent.

Testing (Overall) and Testing (Unit And Behavioural). The same defect twice, so one fix answers both. You were right that nothing touched main: every test drove lint, so a script that detected a failure and then exited zero would have passed the lot. Two cases now drive the entry point with command doubles: a failing linter exits with that linter's own status and names it on stderr, and an all-passing run exits quietly. The second is there so the first is attributable rather than incidental.

I did not add a subprocess-level test of the installed script on top of these. main is the entry point cyclopts calls, the recipe's single invocation is already asserted by a workflow contract, and a third layer would test uv and cyclopts rather than this repository. Say if you would rather have it and I will add it.

Testing (Property / Proof). Taken as actionable rather than optional. Both invariants are stated over an unbounded set, which is exactly what a fixed fixture cannot show:

plan orders any number of surfaces the same way: yamllint over the manifests, one action-validator each, yamllint over the workflows, then actionlint, with each group present only when that surface has files. Generated over zero to six of each.
lint stops at whichever invocation fails, for any failure position.

The second drives the real loop with a substituted runner rather than reimplementing it, since a reimplementation would pass whatever the loop did. It patches through a context rather than the monkeypatch fixture, which Hypothesis rejects here because a function-scoped fixture is not reset between generated examples.

make test-lint-actions reports 12 passed, and make lint passes in full including the Rust lanes.

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discover now distinguishes an absent directory from an unreadable directory. plan is pure over Surfaces. main now reports failures and exits non-zero. The property tests exercise both ordering and first-failure stopping across generated cases.

All four findings are addressed. 🐇

✏️ Learnings added

Learnt from: leynos
URL: https://github.com/leynos/wildside/pull/485

Timestamp: 2026-09-07T17:15:16.258Z
Learning: In `scripts/lint_actions.py`, `discover` must treat an absent lint surface directory as empty but must raise `DiscoveryError` when an existing directory cannot be listed. `Path.rglob` can raise both when iteration starts and while its iterator is consumed, so `_listed` must handle listing failures at both points.

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Repo: leynos/wildside PR: 485
File: tests/workflow_contracts/ci_workflow_test.py:167-167
Timestamp: 2026-09-07T17:09:45.593Z
Learning: In `tests/workflow_contracts/ci_workflow_test.py`, CI contract tests that require an unconditionally executed Make target must require the entire GitHub Actions `run` value to equal the target command and must separately reject a YAML `if` key. Per-line matching is insufficient because a shell-level conditional can contain the command without executing it.

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The contract certified the workflow step and the `docs-check` recipe by finding the gate command among the commands its script runs. Wrapping the command in `if false; then` … `fi` leaves a line that reads exactly like an unconditional invocation, so both assertions passed against a step and a recipe that ran nothing at all. Appending `|| true` passed the recipe assertion for the same reason. Require the whole script instead of a line of it. The CI step must be one command carrying no shell control keyword, and the `docs-check` recipe must be exactly `bun run docs:check`. Both are what the repository already does; neither leaves room for a command that only appears to run. Mutation check, five mutations, all killed and all previously survivors of the first two forms: the CI step wrapping `make all` in a multiline `if false` block; the CI step appending `|| true`; the recipe wrapping the command in a joined `if false` block; the recipe splitting that conditional across recipe lines; the recipe appending `|| true`. The hole was found in leynos/wildside#485 and this contract had it in both places. Claude-Session: https://claude.ai/code/session_01QrjNTnTwM7FmWXe5KFPMPY

CodeScene flagged `test_plan_orders_every_surface_the_same_way` as a Complex Method: it built the repository, computed the expected order, and asserted both the tool sequence and the manifests' sort order in one body. The repository construction and the expected sequence move to helpers, and the sort-order claim becomes its own property. They are separate invariants: one says which tools run and in what order, the other says the manifests within a run do not depend on what the filesystem returned. A test asserting both told the reader which had failed only by line number.

Requiring the step's whole `run` value closed two holes and left a third: a condition skips the step with its `run` untouched, so the contract passes while the gate never executes. `if: false` does it, and so does an ordinary looking `github.event_name == 'push'`, which skips the gate on exactly the event it exists to cover. A gate holds only when three things hold together, each of which defeats the others alone: the workflow triggers on `pull_request`, exactly one step has the command as its whole `run` value, and neither the job nor that step carries an `if` key. The condition is asserted on the key's presence, never on its value. A condition need not be falsy to skip the gate, and comparing against the string "false" would pass its own mutation anyway: YAML parses `false` to a boolean whose string form is `False`. Eight mutations, all failing the contract: `if: false` on the step, `if: false` on the job, a push-only condition on each, the command wrapped in `if false; then ... fi`, `|| true` appended, the command changed, and the `pull_request` trigger removed. Reported by the round on repovec-appliance #105.

The contract matched a command line within the step's `run`, so a step wrapping the command in `if false; then ... fi` satisfied it while running nothing, and a condition on the step or the job skipped the gate with the `run` value untouched. Either leaves a green pull request that never ran the gate. It now uses the shared `_assert_gate_runs_unconditionally` helper, which requires three things together: the workflow triggers on `pull_request`, exactly one step has the command as its whole `run` value, and neither the job nor that step carries an `if` key. The condition is rejected by the key's presence rather than by its value, because a condition need not be falsy to skip the gate: `github.event_name == 'push'` skips it on precisely the event it exists to cover. Nine mutations, all failing the contract: `if: false` on the step, `if: false` on the job, a push-only condition on each, the command wrapped in a false guard, `|| true` appended, the command changed, the step deleted, and the `pull_request` trigger removed. Rebased onto #485 at 202a2cd, which adds the helper.

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leynos added 5 commits September 7, 2026 03:05

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