fm-log

fm-log

What?

Straight-forward logging module.

• lines up everything in nice columns
• uses colors
• sends everything straight to process.stdout (no events, no nextTick()) if desired
• condenses repeated messages
• displays stack traces for logged Error instances and other multi-line content nicely
• optionally displays the source of the logging call
• supports wrapping of morgan in your express app
• can replace the debug module, using hartwig-at/debug

Example

var log = require( "fm-log" ).module( "demo" );

log.info( "Logging without source tracing" );
log.notice( "Initializing application...\nwow\nsuch application" );
log.critical( new Error( "Logging an Error instance." ) );

log.withSource();
log.info( "Logging WITH source tracing" );
log.notice( "You'll never know where this was logged from!" );

log = require( "fm-log" );
log.warn( "We don't need no prefix!" );

log = require( "fm-log" ).module( "something weird" );
log.warn( "...or do we?" );

log = require( "fm-log" );
log.notice( "You're using a longer prefix? I'll adjust." );

log = require( "fm-log" ).module();
log.error( "ouch" );

// Wrap morgan
app.use( require( "fm-log" ).module( "HTTP" ).morgan( {format : "dev"} ) );

How?

Install

npm install fm-log

Put this in every file where you want to log:

var log = require( "fm-log" ).module();

Then just use log.info or one of the other logging levels shown above.

For loggers without a specific prefix, just require() the module and use it directly:

var generic = require( "fm-log" );
generic.notice( "We don't need no prefix" );

To log to a different stream (process.stdout is the default), use .to():

var logger = require( "fm-log" ).to( process.stderr );

To send data straight to the output stream (without nextTick()), use .sync():

var logger = require( "fm-log" ).sync();