cranky-git-logs

#!/bin/bash -eu

function pr_banner()
{
	local txt

	if [ -z "${__COLS:-}" ] ; then
		__COLS=$(tput cols)
	fi
	txt=${*}$(printf "%${__COLS}s")
	echo -e "\033[48;5;160m${txt::${__COLS}}\033[0m"
}

function usage()
{
	cat <<EOF
Usage: $(basename "${0}") [-h] [-l] [GIT_LOG_OPTIONS]

Show kernel source git repo logs.

Optional arguments:
  -h, --help         Show this help message and exit.
  -l, --local        Show local changes, i.e., changes between origin and
                     local HEAD.
  -r, --release NUM  Show change since previous NUM releases.
EOF
}

CRANKY=${CRANKY:-cranky}

local=0
release=0

while [ ${#} -gt 0 ] ; do
	case "${1}" in
		-h|--help)
			usage
			exit
			;;
		-l|--local)
			local=1
			;;
		-r|--release)
			shift
			release=${1}
			;;
		*)
			break
			;;
	esac
	shift
done

if [ ${local} -ne 0 ] && [ "${release}" -ne 0 ] ; then
	usage
	exit 2
fi

while IFS= read -r path ; do
	echo
	pr_banner "${path}"
	cd "${path}"

	rev_range=()
	if [ ${local} -eq 1 ] ; then
		# shellcheck disable=SC1083
		rtb=$(git rev-parse --abbrev-ref --symbolic-full-name @{u})
		subject=$(git log --format=%s "${rtb}" -1)
		m=$(git log --format="%h ___%s___" -1000 | \
		    grep -m1 -F "___${subject}___" || true)
		if [ -n "${m}" ] ; then
			rev_range=("${m%% *}..")
		fi
	elif [ "${release}" -gt 0 ] ; then
		m=$(git log --format="%h ___%s" HEAD~1 | \
		    grep -m"${release}" -F "__UBUNTU: Ubuntu-" | tail -1)
		if [ -n "${m}" ] ; then
			rev_range=("${m%% *}~1..")
		fi
	fi

	git --no-pager log --color=always --decorate=short "${@}" "${rev_range[@]}"
done < <("${CRANKY}" shell-helper source-packages-path) | less