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patch(typegen): stops defaultMaximumTruncationLength getter error #47

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merged 2 commits into from
Nov 22, 2023
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patch(typegen): stops defaultMaximumTruncationLength getter error #47

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6e258d9
patch(typegen): stops `defaultMaximumTruncationLength` getter error
Tbhesswebber Nov 16, 2023
99dbbc1
Update typegen.ts
Tbhesswebber Nov 18, 2023
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7 changes: 5 additions & 2 deletions src/typegen.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -6,12 +6,14 @@ import { AppOptions } from './types'
import { Program } from 'typescript'
import { version } from '../package.json'

// The undocumented defaultMaximumTruncationLength setting determines at what point printed types are truncated.
// The undocumented defaultMaximumTruncationLength setting determines at what point printed types are truncated in versions less than 5.
// In kea-typegen output, we NEVER want the types truncated, as that results in a syntax error –
// "... n more ..." is not valid .d.ts syntax. This is a risk with union types in particular, so we disable truncation.
// See https://github.com/microsoft/TypeScript/blob/cbb8df/src/compiler/utilities.ts#L563
// and https://github.com/microsoft/TypeScript/blob/cbb8df/src/compiler/checker.ts#L6331-L6334.
(ts as any).defaultMaximumTruncationLength = Infinity
if (parseInt(ts.versionMajorMinor.split('.')[0]) < 5)) {
(ts as any).defaultMaximumTruncationLength = Infinity
}

export function runTypeGen(appOptions: AppOptions) {
let program: Program
Expand All @@ -27,6 +29,7 @@ export function runTypeGen(appOptions: AppOptions) {
target: ts.ScriptTarget.ES5,
module: ts.ModuleKind.CommonJS,
noEmit: true,
noErrorTruncation: true,
})
}
resetProgram()
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