Icard/angular-clarity-master(work.../node_modules/log4js/lib/appenders/dateFile.js

77 lines
2.1 KiB
JavaScript

const streams = require('streamroller');
const os = require('os');
const eol = os.EOL;
function openTheStream(filename, pattern, options) {
const stream = new streams.DateRollingFileStream(filename, pattern, options);
stream.on('error', (err) => {
// eslint-disable-next-line no-console
console.error(
'log4js.dateFileAppender - Writing to file %s, error happened ',
filename,
err
);
});
stream.on('drain', () => {
process.emit('log4js:pause', false);
});
return stream;
}
/**
* File appender that rolls files according to a date pattern.
* @param filename base filename.
* @param pattern the format that will be added to the end of filename when rolling,
* also used to check when to roll files - defaults to '.yyyy-MM-dd'
* @param layout layout function for log messages - defaults to basicLayout
* @param options - options to be passed to the underlying stream
* @param timezoneOffset - optional timezone offset in minutes (default system local)
*/
function appender(filename, pattern, layout, options, timezoneOffset) {
// the options for file appender use maxLogSize, but the docs say any file appender
// options should work for dateFile as well.
options.maxSize = options.maxLogSize;
const writer = openTheStream(filename, pattern, options);
const app = function (logEvent) {
if (!writer.writable) {
return;
}
if (!writer.write(layout(logEvent, timezoneOffset) + eol, 'utf8')) {
process.emit('log4js:pause', true);
}
};
app.shutdown = function (complete) {
writer.end('', 'utf-8', complete);
};
return app;
}
function configure(config, layouts) {
let layout = layouts.basicLayout;
if (config.layout) {
layout = layouts.layout(config.layout.type, config.layout);
}
if (!config.alwaysIncludePattern) {
config.alwaysIncludePattern = false;
}
// security default (instead of relying on streamroller default)
config.mode = config.mode || 0o600;
return appender(
config.filename,
config.pattern,
layout,
config,
config.timezoneOffset
);
}
module.exports.configure = configure;