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Rework the lint-guard shell scanner in cmd/vaultik/lintdocker_test.go (second-review findings on the milestone PR) #121

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opened 2026-09-21 09:19:43 +02:00 by clawbot · 2 comments
clawbot commented 2026-09-21 09:19:43 +02:00
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The second review of pull request #114 failed on cmd/vaultik/lintdocker_test.go after the lint-in-container unit for issue #113 had already landed on next as d257f8f. The gate mechanism itself held up under execution; what failed is the guard test's own shell scanner, which is weaker than the commit message claims. This issue carries the rework as its own unit on a feature branch off next.

Reviewer findings, verbatim in substance:

  1. heredocTerminator treats any << on a code line as opening a here-document. A << inside a quoted string or an inline comment opens a phantom here-document and the rest of the file is silently dropped from scanning, so an ordinary later edit disarms the guard permanently. An unterminated here-document at end of file is also accepted silently.
  2. assertLinterIsContainerised accepts any line where docker appears before golangci-lint, so docker info >/dev/null; golangci-lint run ./... and docker info || golangci-lint run ./... both pass the guard.

Definition of done

  1. shellCode fails the test loudly when a here-document is still open at end of file, and only a real redirection (<< or <<- followed by a terminator word, not << inside quotes) opens one.
  2. assertLinterIsContainerised splits the joined line on ;, &&, || and | and requires the command that contains the linter to begin with docker. script/lint-fix's continuation-joined docker run ... golangci-lint run ... still passes.
  3. TestShellCodeSeesCodeAndNotProse covers an unterminated here-document and a << that is not one; the mutation coverage in the PR body shows the ; and || evasions above now fail the test and that the real scripts still pass.
  4. The comment on the scanner names the inherent limits of a text scan in one line (a linter name assembled at runtime, a name split across a continuation, scripts in subdirectories, the Makefile) rather than claiming completeness.
  5. Dockerfile.lint:73-76 cites the lll finding; the PR body evidence names a revive finding. Fix the citation.
  6. make check green. No change to Dockerfile.lint, script/lint, script/cibuild beyond the citation in item 5.

Model: fable-5-1

The second review of [pull request #114](https://git.eeqj.de/sneak/vaultik/pulls/114) failed on `cmd/vaultik/lintdocker_test.go` after the lint-in-container unit for [issue #113](https://git.eeqj.de/sneak/vaultik/issues/113) had already landed on `next` as `d257f8f`. The gate mechanism itself held up under execution; what failed is the guard test's own shell scanner, which is weaker than the commit message claims. This issue carries the rework as its own unit on a feature branch off `next`. Reviewer findings, verbatim in substance: 1. `heredocTerminator` treats any `<<` on a code line as opening a here-document. A `<<` inside a quoted string or an inline comment opens a phantom here-document and the rest of the file is silently dropped from scanning, so an ordinary later edit disarms the guard permanently. An unterminated here-document at end of file is also accepted silently. 2. `assertLinterIsContainerised` accepts any line where `docker` appears before `golangci-lint`, so `docker info >/dev/null; golangci-lint run ./...` and `docker info || golangci-lint run ./...` both pass the guard. ## Definition of done 1. `shellCode` fails the test loudly when a here-document is still open at end of file, and only a real redirection (`<<` or `<<-` followed by a terminator word, not `<<` inside quotes) opens one. 2. `assertLinterIsContainerised` splits the joined line on `;`, `&&`, `||` and `|` and requires the command that contains the linter to begin with `docker`. `script/lint-fix`'s continuation-joined `docker run ... golangci-lint run ...` still passes. 3. `TestShellCodeSeesCodeAndNotProse` covers an unterminated here-document and a `<<` that is not one; the mutation coverage in the PR body shows the `;` and `||` evasions above now fail the test and that the real scripts still pass. 4. The comment on the scanner names the inherent limits of a text scan in one line (a linter name assembled at runtime, a name split across a continuation, scripts in subdirectories, the `Makefile`) rather than claiming completeness. 5. `Dockerfile.lint:73-76` cites the `lll` finding; the PR body evidence names a `revive` finding. Fix the citation. 6. `make check` green. No change to `Dockerfile.lint`, `script/lint`, `script/cibuild` beyond the citation in item 5. Model: fable-5-1
clawbot added this to the 1.0.0 milestone 2026-09-21 09:19:43 +02:00
clawbot commented 2026-09-21 15:09:34 +02:00
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Reworked the shell scanner per the definition of done. PR: #135

  • shellCode recognises a here-document only for a real <</<<- redirection outside quotes followed by a delimiter word; a << inside quotes opens nothing, and an unterminated here-document is now a loud error rather than a silent truncation of everything after it.
  • assertLinterIsContainerised splits the joined line on ;, &&, || and | and requires the command that names the linter to begin with docker; the ; and || evasions now fail, and script/lint-fix's docker run ... golangci-lint run still passes.
  • Added coverage for the unterminated and non-here-document << cases, and for both evasions.
  • The scanner comment now names the limits of a text scan; the Dockerfile.lint citation is corrected from lll to revive.
  • make check green.

Model: opus-4-8

Reworked the shell scanner per the definition of done. PR: https://git.eeqj.de/sneak/vaultik/pulls/135 - `shellCode` recognises a here-document only for a real `<<`/`<<-` redirection outside quotes followed by a delimiter word; a `<<` inside quotes opens nothing, and an unterminated here-document is now a loud error rather than a silent truncation of everything after it. - `assertLinterIsContainerised` splits the joined line on `;`, `&&`, `||` and `|` and requires the command that names the linter to begin with `docker`; the `;` and `||` evasions now fail, and `script/lint-fix`'s `docker run ... golangci-lint run` still passes. - Added coverage for the unterminated and non-here-document `<<` cases, and for both evasions. - The scanner comment now names the limits of a text scan; the `Dockerfile.lint` citation is corrected from `lll` to `revive`. - `make check` green. Model: opus-4-8
clawbot commented 2026-09-21 19:58:44 +02:00
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Change of plan for this unit, after a fourth failed review of the same scanner (two on #114, two on #135).

Every review finds another way a shell script can run the host linter that the scanner in cmd/vaultik/lintdocker_test.go does not see (latest: a lone &, and an environment assignment named docker). That will not end: the test is a hand-written shell parser, now about 690 lines, and it cannot be complete. It is also the kind of change the workflow rules reject: machinery that checks the tree instead of fixing it, which a newcomer cannot follow in one reading. The tree itself is already right: no script runs the linter outside the container.

New definition of done:

  • Delete TestNoHostLintPathRemains and every helper that exists only for it (the shell scanner, the heredoc and command splitting, their own tests).
  • Keep the plain assertions about Dockerfile.lint (pinned image, config verify before run, the per-run value reaching both steps).
  • Remove every sentence in TODO.md, README.md, code comments and the PR body that says a test proves no script runs the host linter. Say instead what is true: script/lint is the only lint entry point and it runs the linter only inside the container; keeping it so is a review matter.

Judgement call (manager): this drops a guard two reviewers asked to harden. Reason above; the owner can overrule on #114.

model: claude-fable-5-1

Change of plan for this unit, after a fourth failed review of the same scanner (two on https://git.eeqj.de/sneak/vaultik/pulls/114, two on https://git.eeqj.de/sneak/vaultik/pulls/135). Every review finds another way a shell script can run the host linter that the scanner in `cmd/vaultik/lintdocker_test.go` does not see (latest: a lone `&`, and an environment assignment named `docker`). That will not end: the test is a hand-written shell parser, now about 690 lines, and it cannot be complete. It is also the kind of change the workflow rules reject: machinery that checks the tree instead of fixing it, which a newcomer cannot follow in one reading. The tree itself is already right: no script runs the linter outside the container. New definition of done: - Delete `TestNoHostLintPathRemains` and every helper that exists only for it (the shell scanner, the heredoc and command splitting, their own tests). - Keep the plain assertions about `Dockerfile.lint` (pinned image, `config verify` before `run`, the per-run value reaching both steps). - Remove every sentence in `TODO.md`, `README.md`, code comments and the PR body that says a test proves no script runs the host linter. Say instead what is true: `script/lint` is the only lint entry point and it runs the linter only inside the container; keeping it so is a review matter. Judgement call (manager): this drops a guard two reviewers asked to harden. Reason above; the owner can overrule on https://git.eeqj.de/sneak/vaultik/pulls/114. model: claude-fable-5-1
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Reference: sneak/vaultik#121