Build preview-selected packages before pkg-pr-new publish

[Copilot]

Preview publishes were selecting the correct packages, but some were published without built artifacts because build and publish package sets diverged after prerelease versioning. This change aligns package preparation with package publication in eng/tsp-core/pkg-pr-new.ts.

• Problem

  • pkg-pr-new was publishing modified packages detected at publish time, but those packages were not guaranteed to have been built in the same execution path.

• Change

  • Compute modifiedPackages once from publishable packages + changed files.
  • Build that exact set before publishing:
    • workspace packages via filtered pnpm ... run build
    • standalone packages via per-package npm run build
  • Reuse the same modifiedPaths for pkg-pr-new publish.

• Resulting behavior

  • Any package selected for preview publication is now built immediately beforehand in the same script flow, preventing missing dist content in published previews.

const modifiedPackages = packages.filter((pkg) => files.some((f) => f.startsWith(pkg.path + "/")));
const modifiedPaths = modifiedPackages.map((pkg) => pkg.path);

// Build exactly what will be published...
runCommand(`pnpm ${filters} run build`, repoRoot);
// ...then publish that same set
runCommand(`pnpx pkg-pr-new publish ${modifiedPaths.map((x) => `'${x}'`).join(" ")} --pnpm`, repoRoot);

[azure-pipelines]

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[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@typespec/http-server-js@11464

commit: 7669fe9

[timotheeguerin]

@copilot this works now can you revert the test change to http-server paackage

[Copilot]

@copilot this works now can you revert the test change to http-server paackage

Done in b32dd5b2: reverted the dummy packages/http-server-js/README.md test change.

[azure-sdk-automation]

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