ccguard 0.2

Prevent code coverage regressions

ccguard

you can only improve! :-)

ccguard compares the current code coverage to past code coverage. ccguard fails unless your new code coverage is equal or better than your past code coverage!

requires

• python
• git

welcome beta testers: setup

# prepare the package and install it
./distrib.sh

Should work on both python2 and python3. But python2 is not anymore supported.

contribute

./bootstrap.sh

please execute flake8, black, pytest and ccguard against all of your changes. (a pre-commit hook will ensure that everythng is fine before letting you commit)

./pre-commit

execute this tool

cd your-favorite-source-folder
# execute unit tests, collecting code coverage here
ccguard.py coverage.xml
# change your code somehow
# execute unit tests, collecting code coverage
# then verify that your code coverage has not decreased
ccguard.py --consider-uncommitted-changes coverage.xml
# if you are rather a visual person, check cc.html and diff.html
ccguard.py --html --consider-uncommitted-changes coverage.xml
# if needed to display the line coverage for each file in the HTML report,
# fine tune the source files path with the --repository argument
ccguard.py --html --consider-uncommitted-changes coverage.xml --repository src/
# allow regressions up to 3%
ccguard.py coverage.xml --tolerance 3
# allow regressions up to 10%, but never descend below 70%
ccguard.py coverage.xml --tolerance 10 --hard-minimum 70
# use the web adapter (ie. send the data to ccguard_server).
# requires a ccguard.server.address setting in the config.
ccguard.py coverage.xml --adapter web

please see [how-to-produce-code-coverage-data](docs/how to produce code coverage data.md) to know how to produce code coverage data in your favourite language.

display code coverage trends

What a better feedback loop than measuring the work you have accomplished?

python ccguard/ccguard_log.py

synchronize repositories

The use case being: you wish to use ccguard as pre-commit. Your team already has some references. Then you could be interested in sharing them.

# upload the report to a distant redis repository
python ccguard/ccguard_sync.py sqlite redis
# download the report from a distant redis repository
python ccguard/ccguard_sync.py redis sqlite
# limit to a single repository
python ccguard/ccguard_sync.py redis sqlite --repository_id abcd
# limit to a single repository and a single commit
python ccguard/ccguard_sync.py redis sqlite --repository_id abcd --commit_id ef12

launch a local server

ccguard server allows you to centralize the reports and the regression checks (useful for CI workflows) also serves coverage and diff reports.

python ccguard/ccguard_server.py

credits

• Alexandre Conrad for his wonderful pycobertura
• all the beta testers for their precious feedback