How to set up pre-commit hook

pre-hook.md

It works for rust and for C++. The difference is that for rust you need to specify rustfmt and for C++ clang-format -i.

1. Add file pre-commit to the folder .githooks in your repo with the following text:

#!/bin/bash

exe=$(which rustfmt)

if [ -n "$exe" ]
then
    # field separator to the new line
    IFS=$'\n'

    for line in $(git status -s)
    do
        # if added or modified
        if [[ $line == A* || $line == M* ]]
        then
            if [[ $line == *.rs ]]
            then
                # format file
                rustfmt $(pwd)/${line:3}
                # add changes
                git add $(pwd)/${line:3}
            fi
        fi
    done

else
    echo "rustfmt was not found"
fi

2. Run in your repo folder:

chmod +x .githooks/pre-commit
git config core.hooksPath .githooks