It's not stable yet!
As a RubyGem
gem "StreakPng", :git => "https://github.com/TanguyAndreani/StreakPng.git"
Go check the demo!
Convert from CSV
gem install specific_install
gem specific_install https://github.com/TanguyAndreani/StreakPng.git
streak_from_csv -- output.png <<EOF
sport,20 min running,2020.08.12
code,my super project,go,2020.08.01
Or go read streak_from_csv to see how you can generate charts with your own data.
If you're just going to use the executable, just know that you can put whatever in your csvs as long as the last field is the date.
bundle exec ruby -Ilib examples/generate.rb