feat(bundler-utils): add shared bundler machinery

[dangreen]

Adds @srcset/bundler-utils: the shared machinery of the bundler integrations - import query parsing, image module codegen (generateSrcSetModule/createModuleString), the blur-up placeholder, and the backend contract (SrcSetBackendFactory/SrcSetBackend, EmitImage/SrcSetImagePaths).

[coveralls]

Coverage Report for CI Build 29837524643

Coverage increased (+2.2%) to 89.168%

Details

• Coverage increased (+2.2%) from the base build.
• Patch coverage: 3 uncovered changes across 3 files (92 of 95 lines covered, 96.84%).
• No coverage regressions found.

Uncovered Changes

File	Changed	Covered	%
packages/bundler-utils/src/module.ts	39	38	97.44%
packages/bundler-utils/src/placeholder.ts	12	11	91.67%
packages/bundler-utils/src/query.ts	24	23	95.83%
Total (4 files)	95	92	96.84%

Coverage Regressions

No coverage regressions found.

---

Coverage Stats

Relevant Lines:	360
Covered Lines:	334
Line Coverage:	92.78%
Relevant Branches:	277
Covered Branches:	234
Branch Coverage:	84.48%
Branches in Coverage %:	Yes
Coverage Strength:	139825.21 hits per line

---

💛 - Coveralls

[Copilot]

Pull request overview

Adds a new workspace package, @srcset/bundler-utils, to centralize shared implementation pieces used by bundler integrations (query parsing, module codegen, placeholder generation, and the backend contract), so integrations can reuse the same machinery and types.

Changes:

• Introduces packages/bundler-utils with query parsing, placeholder generation, ES module code generation, and generateSrcSetModule + backend interfaces.
• Adds unit tests (Vitest) covering query parsing, placeholder generation, module codegen, and module generation behavior.
• Registers the new package in the workspace lockfile and adds package-level build/lint/test configuration.

Reviewed changes

Copilot reviewed 17 out of 18 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
pnpm-lock.yaml	Adds the new packages/bundler-utils importer with dependencies (@srcset/core, sharp, p-limit).
packages/bundler-utils/tsconfig.json	Package TS config for dev/typechecking scope.
packages/bundler-utils/tsconfig.build.json	Build TS config emitting dist/ types/JS.
packages/bundler-utils/src/types.ts	Defines shared bundler-side types (SrcSetRule, backend image/url types).
packages/bundler-utils/src/query.ts	Implements import query parsing into rules/selection/placeholder options.
packages/bundler-utils/src/query.spec.ts	Unit tests for query parsing behavior.
packages/bundler-utils/src/placeholder.ts	Implements blur-up placeholder data-url generation via sharp.
packages/bundler-utils/src/placeholder.spec.ts	Unit tests for placeholder generation behavior.
packages/bundler-utils/src/module.types.ts	Types for generated module entries and selection/resource id formatting.
packages/bundler-utils/src/module.ts	Implements ES module code generation for image imports (createModuleString).
packages/bundler-utils/src/module.spec.ts	Unit tests for module code generation output.
packages/bundler-utils/src/index.ts	Package public exports surface.
packages/bundler-utils/src/generate.types.ts	Defines generateSrcSetModule options and backend contract types.
packages/bundler-utils/src/generate.ts	Implements variant generation orchestration and module output assembly.
packages/bundler-utils/src/generate.spec.ts	Unit tests for generation orchestration and backend behaviors.
packages/bundler-utils/README.md	Package documentation and usage overview.
packages/bundler-utils/package.json	Package metadata, exports, scripts, and dependencies.
packages/bundler-utils/oxlint.config.ts	Package lint configuration extending repo defaults.

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

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[Copilot]

Pull request overview

Copilot reviewed 17 out of 18 changed files in this pull request and generated 3 comments.

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• pnpm-lock.yaml: Generated file

[Copilot]

Pull request overview

Copilot reviewed 17 out of 18 changed files in this pull request and generated 2 comments.

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• pnpm-lock.yaml: Generated file

[Copilot]

Pull request overview

Copilot reviewed 17 out of 18 changed files in this pull request and generated 3 comments.

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• pnpm-lock.yaml: Generated file

[Copilot]

Pull request overview

Copilot reviewed 17 out of 18 changed files in this pull request and generated 2 comments.

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• pnpm-lock.yaml: Generated file

Comments suppressed due to low confidence (1)

packages/bundler-utils/src/query.ts:65

• width currently accepts non-finite numbers (e.g. width=Infinity), because Number(value) > 0 is true for Infinity. This can propagate odd values into selection logic. Consider requiring a finite positive number.

      case 'width': {
        const width = Number(value)

        if (width > 0) {
          query.select = {
            ...query.select,
            width
          }
        }

        break
      }

[Copilot]

Pull request overview

Copilot reviewed 17 out of 18 changed files in this pull request and generated 2 comments.

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• pnpm-lock.yaml: Generated file

[Copilot]

Pull request overview

Copilot reviewed 17 out of 18 changed files in this pull request and generated 1 comment.

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• pnpm-lock.yaml: Generated file

[Copilot]

Pull request overview

Copilot reviewed 17 out of 18 changed files in this pull request and generated 1 comment.

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

[Copilot]

Pull request overview

Copilot reviewed 17 out of 18 changed files in this pull request and generated no new comments.

Files not reviewed (1)

• pnpm-lock.yaml: Generated file