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/**
* Credit: Modified from `winston-namespace` by @SetaSouto:
* https://github.com/SetaSouto/winston-namespace
*
* Key changes:
*
* 1. Use a custom base configuration to avoid overriding the default configuration when
* initializing each logger object. This maintains the same logger initialization API
* as the prior logging solution (`debug` module).
*
* 2. Maintain prior log filtering behavior with the `DEBUG` environment variable
* (instead of the `LOG_NAMESPACES` variable used in winston-namespace).
*/
const path = require( 'path' );
const { createLogger, format, transports } = require( 'winston' );
const state = require( '../../lib/state' );
const namespaces = require( './namespaces' );
/**
* Module variables
*/
const maxFiles = 3;
const maxsize = 15000000;
module.exports = ( namespace, options ) => {
if ( ! options || typeof options !== 'object' ) {
options = {};
}
const formatMessageWithMeta = ( info ) => {
const args = info[ Symbol.for( 'splat' ) ];
if ( args ) {
if ( args instanceof Array && args.length && ! args[ 0 ] ) {
return info;
}
info.message = info.message + JSON.stringify( ...args );
}
return info;
};
const baseformat = format.combine(
format.timestamp( {
format: 'YYYY-MM-DD HH:mm:ss.SSS',
} ),
format.errors( { stack: true } ),
format( ( info, opts ) => formatMessageWithMeta( info, opts ) )(),
format.printf( ( info ) => {
const { timestamp, level, message } = info;
const stack = info.stack ? `\n${ info.stack }` : '';
return `[${ timestamp }] [${ namespace }] [${ level }] ${ message }` + stack;
} )
);
const baseOptions = {
level: process.env.LOG_LEVEL || 'silly',
transports: [
new transports.File( {
dirname: path.dirname( state.getLogPath() ),
filename: path.basename( state.getLogPath() ),
maxFiles,
maxsize,
format: baseformat,
} ),
],
};
const enabled = namespaces.check( namespace );
const logger = createLogger( { ...baseOptions, ...options } );
if ( process.env.DEBUG ) {
logger.add(
new transports.Console( {
format: baseformat,
} )
);
}
return {
error: ( message, meta ) => logger.error( message, meta ),
warn: ( message, meta ) => logger.warn( message, meta ),
info: ( message, meta ) => logger.info( message, meta ),
debug: ( message, meta ) => {
if ( enabled ) {
logger.debug( message, meta );
}
}, // eslint-disable-line brace-style
silly: ( message, meta ) => {
if ( enabled ) {
logger.silly( message, meta );
}
}, // eslint-disable-line brace-style
};
};
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