magillus/flutter-fimber
Fimber is Flutter logger inspired by Timber (logger API for Android)
baixar do githubfimber
Extensible logging for Dart and Flutter.
Package is based on famous Android logging library API - Timber, this is library for simplify logging for Flutter.
Using similar (as far as Dart lang allows) method API with same concepts for tree and planting logging tree.
Also check out flutter_fimber
which extends fimber
to platform specific output and logging style.
Getting Started
To start add using it:
Add fimber
to pubspec.yaml
pre-nullsafety
dependencies:
fimber: ^0.6.6
- remember about import in file you plan to use Fimber
import 'package:fimber/fimber.dart';
Initialize logging tree on start of your application
void main() {
Fimber.plantTree(DebugTree());
// app code here ...
// DebugTree options for time elapsed
// by default DebugTree will output timestamp of the VM/Flutter app
// to enable elapsed time since planting the tree log
Fimber.plantTree(DebugTree.elapsed());
}
Start using it with static methods:
import 'fimber.dart';
void main() {
var parameter = 343.0;
// use directly
Fimber.i("Test message $argument");
Fimber.i("Extra error message", ex: Exception("Test thorwable"));
// other log levels
Fimber.d("DEBUG");
Fimber.v("VERBOSE");
Fimber.w("WARN");
try {
throw Exception("Exception thrown");
} catch (e, stacktrace) {
// providing `stacktrace` will better show where issue was thrown
// if not provided will use log line location.
Fimber.i("Error caught.", ex: e, stacktrace: stacktrace);
}
}
This will log the value and grab a TAG from stacktrace - that is little costly and if more logs will be done per second.
Colorize logs - ColorizeStyle
useColors
property set to true will use default colors of the logos, you can change the mapping with in colorizeMap
for DebugTree
and CustomFormatTree
The useColors
by default is disabled.
ColorizeStyle
Aggregates list of AnsiStyle
so you can combine styles together.
AnsiStyle
is combination of AnsiColor
and AnsiSelection
values
Here is output of test output.
Create tagged version of Fimber
And use its instance inside class, you can create logger for a dart file or for a class.
var logger = FimberLog("MY_TAG");
void main() {
logger.d("Test message");
}
// or inside a class
class SomeBloc {
var logger = FimberLog("SomeBloc");
String fetchMessage() {
logger.d("About to fetch some data.");
//...
var data = "load something";
logger.d("Retrived data (len = ${data.length}");
return data;
}
}
Use block function and pass method that uses logger.
Use this function to log multiple messages with same tag, allows optional return value.
Due to nature of auto-tag generation from stacktrace this block only does it once and create local FimberLog instance to pass into the anonymous method.
var someMessage = "Test message from inside of block";
var output = Fimber.block((log) {
log.d("Started block");
var i = 0;
for (i = 0; i < 10; i++) {
log.d("$someMessage, value: $i");
}
log.i("End of block");
return i;
});
Custon line formatters
Use custom line formatters to define your logging format.
Fimber.plantTree(CustomFormatTree(
logFormat: "${CustomFormatTree.TIME_ELAPSED_TOKEN} ${CustomFormatTree
.MESSAGE_TOKEN} ${CustomFormatTree.TIME_STAMP_TOKEN}"
));
Deprecated moved to fimber_io
package
import 'package:fimber_io/fimber_io.dart';
Fimber.plantTree(FimberFileTree("my-Log-File.txt",
logFormat: "${CustomFormatTree.TIME_ELAPSED_TOKEN} ${CustomFormatTree
.MESSAGE_TOKEN} ${CustomFormatTree.TIME_STAMP_TOKEN}"
));
Use file log tree - the logs will go to a log file (Useful in DartVM apps).
There are log rolling with size and time/date interval, so it is possible to setup log output per hour/day or any other time.
see: SizeRollingFileTree
or TimedRollingFileTree
or use abstract class RollingFileTree
to create your own version of rolling log file.
TODO - road map
- See Issues on Github
- Add Crashlytics plugin (maybe other remote logger tools) with flutter_crashlytics
Licence
Copyright 2018 Mateusz Perlak
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
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