3 # An example hook script to check the commit log message.
4 # Called by git-commit with one argument, the name of the file
5 # that has the commit message. The hook should exit with non-zero
6 # status after issuing an appropriate message if it wants to stop the
7 # commit. The hook is allowed to edit the commit message file.
9 # To enable this hook, make this file executable.
11 # This example catches duplicate Signed-off-by lines.
13 test "" = "$(grep '^Signed-off-by: ' "$1" |
14 sort | uniq -c | sed -e '/^[ ]*1[ ]/d')" || {
15 echo >&2 Duplicate Signed-off-by lines.