Function readValue

src/cli/parse.ts:217–291

(option: CommandLineOption, value: unknown, source: OptionSource)

}

function readValue(option: CommandLineOption, value: unknown, source: OptionSource): ReadValueResult {
    if (value === null) return { value };

    switch (option.type) {
        case "boolean":
        case "string": {
            if (typeof value !== option.type) {
                return {
                    value: undefined,
                    error: cliDiagnostics.compilerOptionRequiresAValueOfType(option.name, option.type),
                };
            }

            return { value };
        }
        case "array":
        case "json-array-of-objects": {
            const isInvalidNonCliValue = source === OptionSource.TsConfig && !Array.isArray(value);
            const isInvalidCliValue = source === OptionSource.CommandLine && typeof value !== "string";

            if (isInvalidNonCliValue || isInvalidCliValue) {
                return {
                    value: undefined,
                    error: cliDiagnostics.compilerOptionRequiresAValueOfType(option.name, option.type),
                };
            }

            const shouldParseValue = source === OptionSource.CommandLine && typeof value === "string";
            if (!shouldParseValue) return { value };

            if (option.type === "array") {
                const array = value.split(",");
                return { value: array };
            }

            try {
                const objects = JSON.parse(value);
                if (!Array.isArray(objects)) {
                    return {
                        value: undefined,
                        error: cliDiagnostics.compilerOptionRequiresAValueOfType(option.name, option.type),
                    };
                }

                return { value: objects };
            } catch (e) {
                if (!(e instanceof SyntaxError)) throw e;

                return {
                    value: undefined,
                    error: cliDiagnostics.compilerOptionCouldNotParseJson(option.name, e.message),
                };
            }
        }
        case "enum": {
            if (typeof value !== "string") {
                return {
                    value: undefined,