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by JakeWharton

JakeWharton /hugo

Annotation-triggered method call logging for your debug builds.

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Annotation-triggered method call logging for your debug builds.

As a programmer, you often add log statements to print method calls, their arguments, their return values, and the time it took to execute. This is not a question. Every one of you does this. Shouldn't it be easier?

Simply add


to your methods and you will automatically get all of the things listed above logged for free.

@DebugLog public String getName(String first, String last) { SystemClock.sleep(15); // Don't ever really do this! return first + " " + last; }
V/Example: ⇢ getName(first="Jake", last="Wharton") V/Example: ⇠ getName [16ms] = "Jake Wharton"

The logging will only happen in debug builds and the annotation itself is never present in the compiled class file for any build type. This means you can keep the annotation and check it into source control. It has zero effect on non-debug builds.

Add it to your project today!

buildscript { repositories { mavenCentral() } dependencies { classpath 'com.jakewharton.hugo:hugo-plugin:1.2.1' } } apply plugin: '' apply plugin: 'com.jakewharton.hugo'

Disable logging temporarily by adding the following:

hugo { enabled false }

If you want to toggle logging at runtime, use


Local Development

Working on this project? Here's some helpful Gradle tasks:

  • install
    • Install plugin, runtime, and annotations into local repo.
  • cleanExample
    • Clean the example project build.
  • assembleExample
    • Build the example project. Must run
  • installExample
    • Build and install the example project debug APK onto a device.


Copyright 2013 Jake Wharton 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 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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