#!/bin/bash

if [ "$#" -lt 1 ]; then
	printf "Usage: %s <commit range>\n", "$0" 1>&2
	exit 1
fi

for c in $(git rev-list --no-merges "$@"); do
	ae=$(git log -1 --format='%ae' "$c")
	aE=$(git log -1 --format='%aE' "$c")
	an=$(git log -1 --format='%an' "$c")
	aN=$(git log -1 --format='%aN' "$c")
	ce=$(git log -1 --format='%ce' "$c")
	cE=$(git log -1 --format='%cE' "$c")
	cn=$(git log -1 --format='%cn' "$c")
	cN=$(git log -1 --format='%cN' "$c")
	sob=$(git log -1 --format='%b' "$c" | grep -i '^[[:space:]]*Signed-off-by:')

	am=false
	cm=false
	grep -i -q "<$ae>" <<<"$sob" ||
		grep -i -q "<$aE>" <<<"$sob" ||
		grep -i -q ":[[:space:]]*$an[[:space:]]*<" <<<"$sob" ||
		grep -i -q ":[[:space:]]*$aN[[:space:]]*<" <<<"$sob" ||
		am=true
	grep -i -q "<$ce>" <<<"$sob" ||
		grep -i -q "<$cE>" <<<"$sob" ||
		grep -i -q ":[[:space:]]*$cn[[:space:]]*<" <<<"$sob" ||
		grep -i -q ":[[:space:]]*$cN[[:space:]]*<" <<<"$sob" ||
		cm=true

	if "$am" || "$cm"; then
		printf "Commit %s\n" "$c"
		"$am" && printf "\tauthor SOB missing\n"
		"$cm" && printf "\tcommitter SOB missing\n"
		printf "%s %s\n%s\n" "$ae" "$ce" "$sob"
	fi
done

exec gitk "$@"