.git/hooks/commit-msg.sample

#!/bin/sh
#
# An example hook script to check the commit log message.
# Called by "git commit" with one argument, the name of the file
# that has the commit message.  The hook should exit with non-zero
# status after issuing an appropriate message if it wants to stop the
# commit.  The hook is allowed to edit the commit message file.
#
# To enable this hook, rename this file to "commit-msg".

# Uncomment the below to add a Signed-off-by line to the message.
# Doing this in a hook is a bad idea in general, but the prepare-commit-msg
# hook is more suited to it.
#
# SOB=$(git var GIT_AUTHOR_IDENT | sed -n 's/^\(.*>\).*$/Signed-off-by: \1/p')
# grep -qs "^$SOB" "$1" || echo "$SOB" >> "$1"

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

test "" = "$(grep '^Signed-off-by: ' "$1" |
         sort | uniq -c | sed -e '/^[   ]*1[    ]/d')" || {
        echo >&2 Duplicate Signed-off-by lines.
        exit 1
}
1	#!/bin/sh
2	#
3	# An example hook script to check the commit log message.
4	# Called by "git commit" with one argument, the name of the file
5	# that has the commit message. The hook should exit with non-zero
6	# status after issuing an appropriate message if it wants to stop the
7	# commit. The hook is allowed to edit the commit message file.
8	#
9	# To enable this hook, rename this file to "commit-msg".
10
11	# Uncomment the below to add a Signed-off-by line to the message.
12	# Doing this in a hook is a bad idea in general, but the prepare-commit-msg
13	# hook is more suited to it.
14	#
15	# SOB=$(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	}