bundler-matrix-verification

Testing & Quality

How to verify @inkline/plugin and @inkline/cli changes across the 6 bundler adapters and the two compile paths, including watch-mode scenarios and error-path checks. Use for any core/plugin or tooling/cli change and for QA of tooling claims.

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Bundler matrix verification

The matrix

@inkline/plugin is one unplugin factory with 6 adapters: vite, webpack, rollup, esbuild, rspack, farm — consumed as @inkline/plugin/<bundler> (or inkline/plugin/<bundler> via the barrel). All bundler peer deps are optional; consumers install only theirs. The factory registers a single transform matching *.ink.tsx that runs compileIncremental from @inkline/compiler.

Plugin options (InklinePluginOptions): target (required, no auto-detection — undefined is a build-time error), sourceMap, config (inline partial config; the plugin does not load inkline.config.ts — pair with @inkline/config-loader). It builds with unbuild, not vp pack — exports-map changes touch both package.json and consumer tsconfigs.

Reality check: the plugin has ZERO direct tests today. Its coverage rides the compiler fixture suite (same compile path) and repo consumers. Any plugin change should leave tests behind; building the matrix harness is a standing mission.

"Works in Vite" is not done

Change class	Minimum verification
Factory core (transform wiring, filter, options)	Vite + webpack + one of Rollup/Rspack, fresh app builds per target
Incremental/cache behavior	Repeated builds + file edits; confirm `compileIncremental` reuses state, output stable
Source-map flag	V3 map emitted/omitted per flag; mappings hit the `.ink.tsx` source
Adapter-specific subpath	That adapter + Vite as control
CLI compile / barrels / story generation	`pnpm --filter @inkline/components build` + inspect `ui/*/.inkline/` + generated CSF
`inkline init` / `add`	Fresh temp dir AND a messy existing project; re-run must be idempotent

The two paths (test the right one)

CLI path — inkline compile 'src/**/*.ink.tsx' --config inkline.config.ts: config-loader → glob → compile per target → write targetOutDir (.inkline/) → barrels (index/headless/stories per config barrels) → story CSF via @inkline/storybook/generator. --watch recompiles on change; --no-clean preserves outputs; --src-dir controls path preservation; --target filters targets.
Plugin path — bundler transform, in-memory, one target, no barrels/stories/config file.

Divergence is by design; a bug report must say which path. inkline check re-exposes compiler diagnostics without writing output — the cheap first probe.

Error paths (must stay loud and typed)

Missing target on the plugin → clear build-time error, not a silent no-op.
Compiler diagnostics must surface through the bundler with file/loc (a swallowed INK error is a p1).
CLI: unknown glob → helpful message; diagnostics formatted TTY-aware (lib/diagnostics.ts); writes atomic with source-map sidecars (lib/writer.ts).
Config discovery is deliberately narrow: inkline.config.{ts,js,mjs} only — no rc files, no package.json field, no dotenv (core/config-loader disables them). Widening discovery is a decision, not a patch.

Harnesses & consumers

Compiler-side: @inkline/compiler/testing + @inkline/test-utils (compile/mount/conformance) — plugin transforms should get colocated tests that call the factory's transform directly.
Live consumers that double as smoke tests: ui/components build (CLI path), per-framework Storybooks (consume .inkline/ output), the e2e visual-parity suite.
Remember stale dist: vp pack in core/compiler before verifying CLI/plugin behavior after compiler edits.
Watch-mode scenarios once plugin HMR lands (v1 frontier): edit component → only affected module recompiles; edit inkline.config.ts → full reload; introduce a diagnostic then fix → dev server survives with correct output. Design tests for these now; don't let HMR ship untested.