60 lines
2.3 KiB
TypeScript
60 lines
2.3 KiB
TypeScript
/*
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* Licensed to Elasticsearch B.V. under one or more contributor
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* license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright
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* ownership. Elasticsearch B.V. licenses this file to you under
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* the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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import { createWriteStream } from 'fs';
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import { pipeline } from 'stream';
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// @ts-expect-error missing type def
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import { Squeeze } from '@hapi/good-squeeze';
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import { KbnLoggerJsonFormat } from './log_format_json';
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import { KbnLoggerStringFormat } from './log_format_string';
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import { LogInterceptor } from './log_interceptor';
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import { LogFormatConfig } from './log_format';
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export function getLogReporter({ events, config }: { events: any; config: LogFormatConfig }) {
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const squeeze = new Squeeze(events);
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const format = config.json ? new KbnLoggerJsonFormat(config) : new KbnLoggerStringFormat(config);
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const logInterceptor = new LogInterceptor();
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if (config.dest === 'stdout') {
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pipeline(logInterceptor, squeeze, format, onFinished);
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// The `pipeline` function is used to properly close all streams in the
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// pipeline in case one of them ends or fails. Since stdout obviously
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// shouldn't be closed in case of a failure in one of the other streams,
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// we're not including that in the call to `pipeline`, but rely on the old
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// `pipe` function instead.
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format.pipe(process.stdout);
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} else {
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const dest = createWriteStream(config.dest, {
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flags: 'a',
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encoding: 'utf8',
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});
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pipeline(logInterceptor, squeeze, format, dest, onFinished);
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}
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return logInterceptor;
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}
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function onFinished(err: NodeJS.ErrnoException | null) {
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if (err) {
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// eslint-disable-next-line no-console
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console.error('An unexpected error occurred in the logging pipeline:', err.stack);
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}
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}
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