feat: add opt-in projectStructure config for co-located tests - #672
feat: add opt-in projectStructure config for co-located tests#672christopher-buss wants to merge 3 commits into
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eslint bumped to 10.8.1 in fdfc55c without a `pnpm gen` run, so the wizard still offered 10.7.0. Unrelated to the rest of this branch. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
`projectStructure: true` requires every source file to sit next to its
test file, via eslint-plugin-project-structure's `folder-structure` rule.
Off by default; the plugin is an optional peer dep, like react and jest.
Only `enforceExistence` is driven. `structure` is required by the rule
and an unmatched node is an error, so the tree we hand it is deliberately
permissive - anything less would turn the co-location check into
whole-tree naming enforcement, which `unicorn/filename-case` and
`flawless/naming-convention` already own.
Config is inline rule options, so no `.projectStructurerc` is needed.
Templates take the plugin's name placeholders plus a `{ext}` token for
the extension of the file that matched, so one default covers every
source extension. A file already matching a template is exempt from it.
Two option values are load-bearing:
- `projectRoot` defaults to `process.cwd()`. The plugin otherwise derives
its root from its own install path, walking up to the folder above
`node_modules`; under pnpm's global virtual store that lands in the
store, no linted file is below it, and every file is skipped silently.
- `longPathsInfo: false`. Path-length warnings go to `console.error`,
escaping every report format and every disable comment.
`projectStructure` is omitted from `OxlintOptionsConfig`: oxlint cannot
run this plugin.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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WalkthroughChangesProject structure validation
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🟡 Moderate · up to The opt-in project-structure check can incorrectly report valid tests as missing when they are located through a custom sibling-folder template outside the default ignored directories. This false-positive behavior requires a fix or explicit owner acceptance before the PR is merge-ready. Sequence Diagram(s)sequenceDiagram
participant UserConfig
participant ESLintFactory
participant projectStructure
participant folder-structure
UserConfig->>ESLintFactory: enable projectStructure
ESLintFactory->>projectStructure: resolve configuration
projectStructure->>folder-structure: configure structure rules
folder-structure-->>ESLintFactory: report project structure violations
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Inline comments:
In `@src/eslint/configs/project-structure.ts`:
- Around line 93-106: Update the children construction around enforceExistence
so path-template exemptions such as specs/{node-name}.spec.{ext} are
materialized or explicitly ignored before the recursive ANY_FOLDER rule applies.
Ensure valid companion files outside GLOB_TESTS are not reported missing, while
preserving existing direct-child and source-extension behavior. Add coverage for
a sibling folder not excluded by GLOB_TESTS.
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README.mdpackage.jsonpnpm-workspace.yamlscripts/config-factories.tssrc/cli/constants-generated.tssrc/eslint/configs/index.tssrc/eslint/configs/project-structure.tssrc/eslint/factory.tssrc/eslint/redundancy.tssrc/eslint/types.tssrc/oxlint/types.tstest/project-structure.spec.ts
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A `folder-structure` rule matches one path segment, so keying the
exemption on the whole template silently skipped any template naming a
file in another folder. `checks/{node-name}.{ext}` then required
`src/checks/value.ts` - the very file that satisfies `src/value.ts` - to
have a `src/checks/checks/value.ts` of its own.
The default hid this: `{node-name}.spec.{ext}` lands on a basename the
default `ignores` already covers through GLOB_TESTS. Only a custom
template with a non-test basename reached it.
Key the exemption on the template's basename instead, so it applies in
whatever folder `folder-structure` reaches the file.
Reported by CodeRabbit on #672.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
1 participant
What
Adds an opt-in
projectStructureconfig that requires every source file to sit next to its test file, through eslint-plugin-project-structure'sfolder-structurerule.src/place-service.tsthen has to be joined bysrc/place-service.spec.ts.Off by default. The plugin is an optional peer dependency, the same as
reactandjest.Why
Replaces christopher-buss/eslint-plugin-flawless#14, which asked for a
flawlessrule doing exactly this. Prior research found the upstream plugin already covers the case properly, so the preset consumes it rather than duplicating it.Design notes
Only
enforceExistenceis driven.structureis required by the rule and any unmatched node is an error, so the tree the config hands it is deliberately permissive: any file, any folder, recursive. Anything less would turn the co-location check into whole-tree naming enforcement, whichunicorn/filename-caseandflawless/naming-conventionalready own, and the two would fight.Config is inline rule options, so consumers need no
.projectStructurerc.{ext}token. Templates take the plugin's name placeholders plus a{ext}token standing for the extension of the file that matched, so the single default{node-name}.spec.{ext}covers.ts,.tsxand the rest.{node-name}matches the kebab-case filenames the preset already enforces. A file already matching a template is exempt from it, derived from the template itself so a customenforceExistencekeeps the exemption in step.projectRootis load-bearing. It defaults toprocess.cwd(). The plugin otherwise derives its root from its own install path (dirname(__filename), then up to the folder abovenode_modules). Under pnpm's global virtual store — which this repo enables and the README recommends — that lands inD:\packages\pnpm\store\..., no linted file is below it, and every file is skipped without a word. This surfaced during development as four tests that "passed" while reporting zero errors. Worth an upstream issue separately.longPathsInfo: false. The plugin's path-length warnings go toconsole.error, escaping every report format and every disable comment.projectStructureis omitted fromOxlintOptionsConfig— oxlint cannot run this plugin.Reviewer notes
test/project-structure.spec.tscover the report, the clean case, kebab-case names,{ext}expansion, nesting depth, the default ignores, a custom template, a sibling-folder template, andstructureRoot.typescript: { typeAware: false }. The project service resolves against the runner's cwd, not the temporary fixture, so every fixture file would otherwise be a fatal parse error and no rule at all would run.--cachecaveat is documented: deletingfoo.spec.tsdoes not changefoo.ts, so a cached run replays the old clean result. The check is only sound uncached.projectStructure.cache.jsonintoprojectRootwhile it has something to report. The README says to gitignore it.pnpm genrepaired version-constant drift left by fdfc55c (eslint 10.7.0 → 10.8.1). Split out so the feature diff stays clean.Verification
pnpm typecheckclean.pnpm test— 40 files, 580 tests passed, no type errors.pnpm lint— oxlint, fast and typed ESLint passes all exit 0.pnpm check:extensions— 514 dependencies checked, all 28 table entries hold. Theprocess.cwd()default was also verified end-to-end against the builtdistin a scratch project under the global virtual store.🤖 Generated with Claude Code
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