Allow do migrations in environments

[petebacondarwin]

What this PR solves / how to test

Allow Durable Object migrations to be overridable in environments. By making the migrations key inheritable, users can provide different migrations for each wrangler.toml environment.

Resolves #729

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:
• Changeset (Changeset guidelines)
  • TODO (before merge)
  • Included
  • Not necessary because:
• Public documentation
  • TODO (before merge)
  • Cloudflare docs PR(s): Update Durable Object docs to say that migrations can be inherited in wrangler.toml cloudflare-docs#15155
  • Not necessary because:

[changeset-bot]

🦋 Changeset detected

Latest commit: e700742

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

This PR includes changesets to release 2 packages

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

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[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/9417249321/npm-package-wrangler-5995

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

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/prs/5995/npm-package-wrangler-5995

Or you can use npx with this latest build directly:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9417249321/npm-package-wrangler-5995 dev path/to/script.js

Additional artifacts:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9417249321/npm-package-create-cloudflare-5995 --no-auto-update

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9417249321/npm-package-cloudflare-kv-asset-handler-5995

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9417249321/npm-package-miniflare-5995

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9417249321/npm-package-cloudflare-pages-shared-5995

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9417249321/npm-package-cloudflare-vitest-pool-workers-5995

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

---

wrangler@3.60.0 includes the following runtime dependencies:

Package	Constraint	Resolved
miniflare	workspace:*	3.20240605.0
workerd	1.20240605.0	1.20240605.0
workerd --version	1.20240605.0	2024-06-05

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

[threepointone]

Does this make migrations under environments mandatory, or will it pick up the top one if we don't define it?

[petebacondarwin]

Does this make migrations under environments mandatory, or will it pick up the top one if we don't define it?

To avoid a breaking change it is inheritable so it will be picked up from the top level.

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[Scamreno]

Thanks