#!/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, make this file executable.

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

# Make sure commits on RHEL branches reference RHEL bugs.
RETVAL=0

git branch | grep ^* | cut -c3- | grep -q ^rhel
if [ $? -eq 1 ]; then
    exit ${RETVAL}
fi

if [ -f "${HOME}/.rhbzauth" ]; then
    . "${HOME}/.rhbzauth"
fi

if [ -z "${RHBZ_USER}" -o -z "${RHBZ_PASSWORD}" ]; then
    bzcmd="bugzilla"
else
    bzcmd="bugzilla --user=${RHBZ_USER} --password=${RHBZ_PASSWORD}"
fi

${bzcmd} >/dev/null 2>&1
if [ $? -eq 127 ]; then
    echo "*** 'yum install python-bugzilla' to validate bug references." >&2

    msg="$(mktemp $(pwd)/commit.msg.XXXXXXXXXX)"
    cp "${1}" "${msg}"
    echo
    echo "Aborted commit message written to: $(basename ${msg})"
    exit 1
else
    ${bzcmd} login
fi

summary="$(head -n 1 ${1})"
for word in ${summary} ; do
    echo "${word}" | grep -q -E "^.*(#[0-9]+).*"
    if [ $? -eq 0 ]; then
        bug="$(echo "${word}" | sed -e 's/^(#//g' -e 's/).*$//g')"
        ${bzcmd} query --bug_id=${bug} --outputformat="%{product}" | grep -q "^Red Hat Enterprise Linux.*"
        if [ $? -ne 0 ]; then
            echo "*** BZ ${bug} is not a RHEL bug." >&2
            RETVAL=1
        fi
    fi
done

last=$(($(wc -l < ${1}) - 2))
if [ ${last} -gt 0 ]; then
    tail -n ${last} ${1} | grep -v "^#" |
    grep -E "^(Resolves|Related|Conflicts): rhbz#[0-9]+$" |
    while read line ; do
        bug="$(echo ${line} | cut -d '#' -f 2)"
        ${bzcmd} query --bug_id=${bug} --outputformat="%{product}" | grep -q "^Red Hat Enterprise Linux.*"
        if [ $? -ne 0 ]; then
            echo "*** BZ ${bug} is not a RHEL bug." >&2
            RETVAL=1
        fi
    done
fi

if [ ${RETVAL} -eq 1 ]; then
    msg="$(mktemp $(pwd)/commit.msg.XXXXXXXXXX)"
    cp "${1}" "${msg}"
    echo
    echo "Aborted commit message written to: $(basename ${msg})"
fi

exit ${RETVAL}