Git global sign-off hook

Global sign-off hook.md

Add global hooks dir

git config --global core.hooksPath /path/to/my/centralized/hooks

Add commit-msg hook

#!/bin/sh

NAME=$(git config user.name)
EMAIL=$(git config user.email)

if [ -z "$NAME" ]; then
    echo "empty git config user.name"
    exit 1
fi

if [ -z "$EMAIL" ]; then
    echo "empty git config user.email"
    exit 1
fi

git interpret-trailers --if-exists doNothing --trailer \
    "Signed-off-by: $NAME <$EMAIL>" \
    --in-place "$1"

make it executable

chmod +x commit-msg