Improve compiler options migration error reporting

[clydin]

This change provides more fine-grained warnings during the update-module-and-target-compiler-options migration for V10.0 in the event a TypeScript configuration file could not be updated. This can help prevent update issues where, for instance, a tsconfig path was misspelled prior to the update. The JSONFile utility class was also augmented to directly throw when creating to ensure that the content property is always initialized.

[alan-agius4]

Much better. :)

[alan-agius4]

Changed to target to master only as the JSONFile implementation doesn't exist in the patch branch.

[ChaitanyaBabar]

Hi @filipesilva , @clydin

Thanks for the above changes in update-module-and-target-compiler-options.ts.

Actually my angular migration from 9 to 10 halted as due to error on in switch case for Builders.NgPackagr in file update-module-and-target-compiler-options.ts.

Can you please let me know when would be the master branch containing these above changes done here
would be published in npm registry, because as of now the above changes are not present in @angular/cli version 10.0.5 in npm registry.

Thanks,
Chaitanya

[alan-agius4]

Hi @ChaitanyaBabar, this will available in 10.1.0, which will be released as stable some time around end of this month.

You can already try this by running ng update @angular/cli --next.

[ChaitanyaBabar]

@alan-agius4

Thanks for the update.

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