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Jacoco Badge Gradle Plugin

Jacoco Badge Gradle Plugin aims to analyze Jacoco Test Coverage Report and update the README file in your Java project with the badge link generated by Shields IO to reflect your code coverage on code change.

Usage

1. Add this plugin in your build.gradle

plugins {
    id 'java'
    id 'jacoco'
    id 'com.github.dawnwords.jacoco.badge'
}

2. Put the badge link placeholder in your README.md

# Your Project Name

some basic description

### code coverages
![LINE](http://line.coverage.link)
![BRANCH](http://branch.coverage.link)
![COMPLEXITY](http://complexity.link)

### some other introductions

Note that by default the README.md file should be placed in the project root directory together with your build.gradle file.

3. Execute generate jacoco badge task after jacoco report task

./gradlew jacocoTestReport generateJacocoBadge

then you'll see the coverage link in your README.md is automatically updated based on your jacoco coverage report shown as following

![LINE](https://img.shields.io/badge/line--coverage-87%25-brightgreen.svg)
![BRANCH](https://img.shields.io/badge/branch--coverage-78%25-yellow.svg)
![COMPLEXITY](https://img.shields.io/badge/complexity-1.90-brightgreen.svg)

Plugin Settings

There's a configuration point for this plugin: jacocoBadgeGenSetting in your build.gradle. You can manually specify jacocoReportPath, readmePath and limit and their default value is shown as following:

jacocoBadgeGenSetting {
    jacocoReportPath  "$buildDir/reports/jacoco/test/jacocoTestReport.xml"
    readmePath "$projectDir/README.md"
    // since v0.2.0, percentage limitation (0-100) for different type of coverage
    limit = ['instruction': 0, 'branch': 0, 'line': 0, 'method': 0, 'class': 0]
}

Coverage Badge Type

Jacoco gives us 6 coverage metrics in its test report, namely INSTRUCTION, BRANCH, LINE, COMPLEXITY, METHOD and CLASS. Your badge link should be place within a new line and the alt part should be one of the 6 values so that this plugin can detect them.