fix: support non-default build conditions via the WRANGLER_BUILD_CONDITIONS flag

[petebacondarwin]

What this PR solves / how to test

• support non-default build conditions via the WRANGLER_BUILD_CONDITIONS flag
• support setting the build platform via the WRANGLER_BUILD_PLATFORM flag

Fixes #6742

Author has addressed the following

• Tests
  • TODO (before merge)
  • Included
  • Not necessary because:
• E2E Tests CI Job required? (Use "e2e" label or ask maintainer to run separately)
  • I don't know
  • Required / Maybe required
  • Not required because: fixture covers the behaviour
• Changeset (Changeset guidelines)
  • TODO (before merge)
  • Included
  • Not necessary because:
• Public documentation
  • TODO (before merge)
  • Cloudflare docs PR(s):
  • Not necessary because: internal undocumented flag

[changeset-bot]

🦋 Changeset detected

Latest commit: e024f96

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
wrangler	Patch
@cloudflare/vitest-pool-workers	Patch

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[github-actions]

A wrangler prerelease is available for testing. You can install this latest build in your project with:

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/10940169561/npm-package-wrangler-6743

You can reference the automatically updated head of this PR with:

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/prs/6743/npm-package-wrangler-6743

Or you can use npx with this latest build directly:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/10940169561/npm-package-wrangler-6743 dev path/to/script.js

Additional artifacts:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/10940169561/npm-package-create-cloudflare-6743 --no-auto-update

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/10940169561/npm-package-cloudflare-kv-asset-handler-6743

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/10940169561/npm-package-miniflare-6743

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/10940169561/npm-package-cloudflare-pages-shared-6743

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/10940169561/npm-package-cloudflare-vitest-pool-workers-6743

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/10940169561/npm-package-cloudflare-workers-editor-shared-6743

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/10940169561/npm-package-cloudflare-workers-shared-6743

Note that these links will no longer work once the GitHub Actions artifact expires.

---

[email protected] includes the following runtime dependencies:

Package	Constraint	Resolved
miniflare	workspace:*	3.20240909.3
workerd	1.20240909.0	1.20240909.0
workerd --version	1.20240909.0	2024-09-09

Please ensure constraints are pinned, and miniflare/workerd minor versions match.

[vicb]

We should also add WRANGLER_BUILD_PLATFORM to set the platform option for esbuild. This should be set to "node" to prevent the import of browser files. The commerce app would not build without that.

It would be nice to add some links to the relevant docs:

• esbuild https://esbuild.github.io/api/#how-conditions-work, https://esbuild.github.io/api/#platform
• node/package.json https://nodejs.org/api/packages.html#conditional-exports

[petebacondarwin]

Skipping PR description validation as it is a bit broken 😄