cpdiff

File difference tool for competitive programming.

Installation

go install github.com/ChrisVilches/cpdiff@latest

Arch Linux (AUR)

yay -S cpdiff

Usage

Comparing standard input (e.g. some program's output redirected to cpdiff) against a file (e.g. the correct answer):

./my-program < in-file | cpdiff ans-file

Or compare two files:

cpdiff file1 file2

Help (see all options):

cpdiff --help

Screenshots

Comparing each number individually. Numbers are allowed to have an error:

Comparing strings. Each character is compared individually:

If you want to compare binary strings (or digits), you can compare them character by character instead of comparing their numeric value:

Big numbers are supported. Numbers can have arbitrary precision or amount of digits:

Development

Linting and formatting:

go fmt ./...
revive --formatter stylish ./...

In order to run tests, first build the project, then set the environment variable below to the path of the executable:

go build
INTEGRATION_TEST_EXECUTABLE=/path/cpdiff go test ./...

Verify installation command works:

IMG=cpdiff-install-test

docker build -t $IMG .
docker run --rm $IMG

Clean up manually afterwards (i.e. remove images).

Generate screenshots by first installing termshot and then executing the following command:

bash ./screenshots/gen.sh path_to_termshot_executable path_to_cpdiff_executable