Better error messages when switching from browser-esbuild to application builder

[hakimio]

Command

build

Description

When trying to switch from browser-esbuild to application builder like the deprecation warning suggests, I get the following cryptic messages:

• Data path "" must have required property 'browser'.: means main option was split to browser and server and you are supposed to add at least browser option:

"architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:application",
          "options": {
            "browser": "src/main.ts",

• Data path "" must NOT have additional properties(main).: main was replaced by browser and server.
• Data path "/polyfills" must be array.. "polyfills": "src/polyfills.ts" option should be replaced with "polyfills": ["zone.js"]

Describe the solution you'd like

Better error messages.

Describe alternatives you've considered

No response

[dgp1130]

Agreed the error message here is not great. Unfortunately, this one is generated from Architect which is too generic to really be more specific. It doesn't have the context to give more information here.

We have a more general issue tracking this here: #11479

For browser / browser-esbuild -> application specifically, we're working on a schematic to automatically perform this migration so users would never make this mistake in the first place.

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