jacococli-minimal-report

Generate minimal JSON coverage reports from JaCoCo execution data.

Motivation

The standard jacococli report command produces reports whose size depends on the total number of analyzed classes. Even if only a small portion of the codebase is exercised, all classes are included in the output.

jacococli-minimal-report emits a report that contains only the methods with at least one covered instruction. Uncovered classes and methods are omitted entirely. As a result, the output size depends on the amount of actual coverage data rather than on the size of the analyzed codebase.

Usage

java -jar jacococli-report.jar <execfiles...> --classfiles <classpaths...> --json <output-file>

<execfiles...>: One or more JaCoCo .exec files. --classfiles <classpaths...>: One or more directories or JAR files containing compiled .class files. --json <output-file>: Path to the generated JSON report.

Output format

The generated JSON document is a nested mapping structured as:

{
  "<fully-qualified-class-name>": {
    "<method-name-and-descriptor>": [<line>, <line>, ...]
  }
}

Only lines reported as FULLY_COVERED or PARTLY_COVERED by JaCoCo are included.