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options.ts
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options.ts
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import {
InputOptions,
NormalizedGeneratedCodeOptions,
NormalizedOutputOptions,
NormalizedTreeshakingOptions,
OutputOptions,
WarningHandler
} from '../../rollup/types';
import { errInvalidOption, error } from '../error';
import { printQuotedStringList } from '../printStringList';
export interface GenericConfigObject {
[key: string]: unknown;
}
export const defaultOnWarn: WarningHandler = warning => console.warn(warning.message || warning);
export function warnUnknownOptions(
passedOptions: GenericConfigObject,
validOptions: string[],
optionType: string,
warn: WarningHandler,
ignoredKeys = /$./
): void {
const validOptionSet = new Set(validOptions);
const unknownOptions = Object.keys(passedOptions).filter(
key => !(validOptionSet.has(key) || ignoredKeys.test(key))
);
if (unknownOptions.length > 0) {
warn({
code: 'UNKNOWN_OPTION',
message: `Unknown ${optionType}: ${unknownOptions.join(', ')}. Allowed options: ${[
...validOptionSet
]
.sort()
.join(', ')}`
});
}
}
type ObjectValue<Base> = Base extends Record<string, any> ? Base : never;
export const treeshakePresets: {
[key in NonNullable<
ObjectValue<InputOptions['treeshake']>['preset']
>]: NormalizedTreeshakingOptions;
} = {
recommended: {
annotations: true,
correctVarValueBeforeDeclaration: false,
moduleSideEffects: () => true,
propertyReadSideEffects: true,
tryCatchDeoptimization: true,
unknownGlobalSideEffects: false
},
safest: {
annotations: true,
correctVarValueBeforeDeclaration: true,
moduleSideEffects: () => true,
propertyReadSideEffects: true,
tryCatchDeoptimization: true,
unknownGlobalSideEffects: true
},
smallest: {
annotations: true,
correctVarValueBeforeDeclaration: false,
moduleSideEffects: () => false,
propertyReadSideEffects: false,
tryCatchDeoptimization: false,
unknownGlobalSideEffects: false
}
};
export const generatedCodePresets: {
[key in NonNullable<
ObjectValue<OutputOptions['generatedCode']>['preset']
>]: NormalizedOutputOptions['generatedCode'];
} = {
es2015: {
arrowFunctions: true,
blockBindings: true,
objectShorthand: true,
reservedNamesAsProps: true
},
es5: {
arrowFunctions: false,
blockBindings: false,
objectShorthand: false,
reservedNamesAsProps: false
}
};
type ObjectOptionWithPresets =
| Partial<NormalizedTreeshakingOptions>
| Partial<NormalizedGeneratedCodeOptions>;
export const objectifyOptionWithPresets =
<T extends ObjectOptionWithPresets>(
presets: Record<string, T>,
optionName: string,
additionalValues: string
) =>
(value: unknown): Record<string, unknown> => {
if (typeof value === 'string') {
const preset = presets[value];
if (preset) {
return preset;
}
error(
errInvalidOption(
optionName,
getHashFromObjectOption(optionName),
`valid values are ${additionalValues}${printQuotedStringList(
Object.keys(presets)
)}. You can also supply an object for more fine-grained control`,
value
)
);
}
return value && typeof value === 'object' ? (value as Record<string, unknown>) : {};
};
export const getOptionWithPreset = <T extends ObjectOptionWithPresets>(
value: unknown,
presets: Record<string, T>,
optionName: string,
additionalValues: string
): Record<string, unknown> => {
const presetName: string | undefined = (value as any)?.preset;
if (presetName) {
const preset = presets[presetName];
if (preset) {
return { ...preset, ...(value as Record<string, unknown>) };
} else {
error(
errInvalidOption(
`${optionName}.preset`,
getHashFromObjectOption(optionName),
`valid values are ${printQuotedStringList(Object.keys(presets))}`,
presetName
)
);
}
}
return objectifyOptionWithPresets(presets, optionName, additionalValues)(value);
};
const getHashFromObjectOption = (optionName: string): string =>
optionName.split('.').join('').toLowerCase();