metr

metric calculator for Java projects

for a project:

• cn = 1 - sum(dloc) / sum(sloc)

for each method:

• sloc = source lines of code
• dloc = dloc
• cc = cyclomatic complexity
• (not yet) ncalls - number of calls (including calls via overriding)

run

• sbt "run -s src"

options

• -t (or --trend) flag tracks all previous commits and generate trend.txt and trend.html which show how the cn metric changes.

output

Each line represents sloc - dloc - cc - name of a method.

11      8.5     3   method1
8       7       2   method2
...

samples

This project points to two submodules as samples: GitHub's android app, Google's iosched app.

• after initial clone, git submodule init/update to retrieve sample projects' source
• samples/google-iosched requires 'android-18', 'Google Repository' and 'Build Tool v18.0.1'. To build ./gradlew asDe
• samples/github-android requires 'android-16'. To build mvn package
• In samples directory, run scala run_samples.scala to run metr on all samples.
• samples/github-android-output contains trend of cn and sloc

notes

• sbt update will retrieve managed dependencies.
• sbt eclipse will generate/update eclipse project setting.
• sbt assembly to make a one jar executable

TODOs

• add C++/C support