Use TOML configuration for function build path

[andrewhassan]

#gsd:40977

WHY are these changes introduced?

Fixes https://github.com/Shopify/shopify-functions/issues/445

WHAT is this pull request doing?

Function developers have the option of specifying a custom build path for their Wasm file. This PR updates the CLI code to read from that path if it's specified, otherwise use the default path of dist/index.wasm (described here).

How to test your changes?

1. Create a Rust function with a specific build path (e.g. target/wasm32-wasi/release/my-function.wasm)
2. Run shopify app deploy

Measuring impact

How do we know this change was effective? Please choose one:

• n/a - this doesn't need measurement, e.g. a linting rule or a bug-fix
• Existing analytics will cater for this addition
• PR includes analytics changes to measure impact

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes

[github-actions]

Thanks for your contribution!

Depending on what you are working on, you may want to request a review from a Shopify team:

• Themes: @shopify/advanced-edits
• UI extensions: @shopify/ui-extensions-cli
  • Checkout UI extensions: @shopify/checkout-ui-extensions-api-stewardship
• Hydrogen: @shopify/hydrogen
• Other: @shopify/app-inner-loop

[andrewhassan]

/snapit

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	72.68% (+0.01% 🔼)	8541/11752
🟡	Branches	69.65% (+0.01% 🔼)	4197/6026
🟡	Functions	71.73%	2207/3077
🟡	Lines	73.01% (+0.01% 🔼)	8085/11074

Test suite run success

1943 tests passing in 876 suites.

Report generated by 🧪jest coverage report action from 083aaaf

[github-actions]

🫰✨ Thanks @andrewhassan! Your snapshot has been published to npm.

Test the snapshot by intalling your package globally:

pnpm i -g @shopify/[email protected]

After installing, validate the version by running just shopify in your terminal
If the versions don't match, you might have multiple global instances installed.
Use which shopify to find out which one you are running and uninstall it.

[andrewhassan]

/snapit

[github-actions]

We detected some changes at either packages/*/src or packages/cli-kit/assets/cli-ruby/** and there are no updates in the .changeset.
If the changes are user-facing, run "pnpm changeset add" to track your changes and include them in the next release CHANGELOG.

[github-actions]

🫰✨ Thanks @andrewhassan! Your snapshot has been published to npm.

Test the snapshot by intalling your package globally:

pnpm i -g @shopify/[email protected]

After installing, validate the version by running just shopify in your terminal
If the versions don't match, you might have multiple global instances installed.
Use which shopify to find out which one you are running and uninstall it.

[DuncanUszkay1]

Did this feature simply not work before? 🤔 Or is this net-new?

Also- is this something worth testing? Or are we considering our smoke tests to be sufficient here?

[andrewhassan]

@DuncanUszkay1 This is a net new bug from this PR, which was shipped yesterday.

[saga-dasgupta]

Thanks a lot for fixing this!

[DuncanUszkay1]

Ah, I see now. Thanks for the context