1 #!/bin/sh

     2 #

     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.

     8 #

     9 # To enable this hook, rename this file to "commit-msg".

    10 

    11 # Uncomment the below to add a Signed-off-by line to the message.

    12 # Doing this in a hook is a bad idea in general, but the prepare-commit-msg

    13 # hook is more suited to it.

    14 #

    15 # SOB=$(git var GIT_AUTHOR_IDENT | sed -n 's/^\(.*>\).*$/Signed-off-by: \1/p')

    16 # grep -qs "^$SOB" "$1" || echo "$SOB" >> "$1"

    17 

    18 # This example catches duplicate Signed-off-by lines.

    19 

    20 test "" = "$(grep '^Signed-off-by: ' "$1" |

    21 	 sort | uniq -c | sed -e '/^[ 	]*1[ 	]/d')" || {

    22 	echo >&2 Duplicate Signed-off-by lines.

    23 	exit 1

    24 }