Function createDiagnosticReporter

packages/tooling/src/typescript.ts:7–30

(pretty: boolean, logger: Logger)

type Logger = Pick<Console, 'log' | 'info' | 'warn' | 'error'>;

export function createDiagnosticReporter(pretty: boolean, logger: Logger): ts.DiagnosticReporter {
    const host: ts.FormatDiagnosticsHost = {
        getCurrentDirectory: () => ts.sys.getCurrentDirectory(),
        getNewLine: () => ts.sys.newLine,
        getCanonicalFileName: ts.sys.useCaseSensitiveFileNames ? x => x : x => x.toLowerCase()
    };

    const mapping: Record<ts.DiagnosticCategory, keyof Logger> = {
        [ts.DiagnosticCategory.Warning]: 'warn',
        [ts.DiagnosticCategory.Error]: 'error',
        [ts.DiagnosticCategory.Message]: 'info',
        [ts.DiagnosticCategory.Suggestion]: 'log'
    };

    if (!pretty) {
        return diagnostic => logger[mapping[diagnostic.category]](ts.formatDiagnostic(diagnostic, host));
    }

    return diagnostic => {
        logger[mapping[diagnostic.category]](
            ts.formatDiagnosticsWithColorAndContext([diagnostic], host) + host.getNewLine()
        );
    };
}

export function symbolFromNode(checker: ts.TypeChecker, node: ts.Node) {
    return ((node as any).symbol as ts.Symbol | undefined) || checker.getSymbolAtLocation(node);