cccv
cccv finds what parts of a diff were copy/pasted from elsewhere in the project.
Why? Because copy/pasted code is impossible to spot at code review time.
Installation
Use Docker image:
% git diff | docker run --rm -i artemave/cccv
Or, compile cccv binary (needs Docker):
% git clone https://github.com/artemave/cccv.git && cd cccv
% make
Or, if you have Golang installed:
% go get github.com/artemave/cccv
Usage
% git checkout pr1
% git diff master | cccv
For fine tuning, drop .cccv.yml into the root of your project. Example:
exclude-lines:
- "require\\(['\"].+['\"]\\);$" # will exclude `var x = require('y');`
# this regexp gets parsed by YAML first, hence extra escaping for \ and "
- console.log
exclude-files:
- "README.*" # regexp, NOT a glob
min-hunk-size: 3 # mininum number of consecutive duplicate
# lines to consider relevant; default 2
min-line-length: 15 # minimum line length (bar leading/trailing tabs and spaces)
# to be considered relevant; default 10
Limitations
Relies on default git diff output format.