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#!/bin/bash
die() {
[ "$#" -eq 0 ] || echo "$*" >&2
exit 1
}
err() {
echo "$*" >&2
}
quit() {
[ "$#" -eq 0 ] || echo "$*"
exit 0
}
#### Main
USAGE="Usage: ${0##*/} [-o <output_dir>] [-s <start_num>] [-b <base>] commit_id..."
OUTPUT=
BASE=
NUM=
while [ -n "$1" -a -z "${1##-*}" ]; do
case "$1" in
-b) BASE="$2" ; shift 2 ;;
-o) OUTPUT="$2" ; shift 2 ;;
-s) NUM="$2" ; shift 2 ;;
-h|--help) quit "$USAGE" ;;
*) die "$USAGE" ;;
esac
done
PATCHES=( "$@" )
NUM=${NUM:-1}
for p in ${PATCHES[@]}; do
if [ -n "$BASE" ]; then
# find the patch number from the base.
# E.g. v2.9-dev0-774-gd710dfbac
NUM=$(git describe --match "$BASE" "$p")
NUM=${NUM#"$BASE"-}
NUM=${NUM%-*}
fi
git format-patch -k -1 --start-number=$NUM ${OUTPUT:+-o $OUTPUT} "$p"
((NUM++))
done
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