git-mailapply.sh

#!/bin/sh -eu

. shell-error
. shell-signal

PROG_VERSION=1.0

show_help()
{
	cat <<-EOF
	Usage: $PROG [options] (<mbox> | <Maildir>)

	Options:
	  -s, --signoff           Pass -s flag to git-am.
	  -k, --keep              Pass -k flag to git-am.
	  -3, --3way, --no-3way   Pass -3 flag to git-am.
	  -V, --version           Print program version and exit;
	  -h, --help              Show this text and exit.

	Report bugs to http://bugzilla.altlinux.org/

	EOF
	exit
}

print_version()
{
	cat <<-EOF
	$PROG version $PROG_VERSION
	Written by Alexey Gladkov <[email protected]>

	Copyright (C) 20018  Alexey Gladkov <[email protected]>
	This is free software; see the source for copying conditions.  There is NO
	warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	EOF
	exit
}

TEMP=`getopt -n $PROG -o '3,s,k,h,v,V' -l '3way,no-3way,signoff,keep,help,verbose,version' -- "$@"` ||
	show_usage
eval set -- "$TEMP"

git_am_args=
while :; do
	case "$1" in
		-s|--signoff)
			git_am_args="$git_am_args \"$1\""
			;;
		-k|--keep)
			git_am_args="$git_am_args \"$1\""
			;;
		-3|--3way|--no-3way)
			git_am_args="$git_am_args \"$1\""
			;;
		-h|--help)
			show_help
			;;
		-v|--verbose)
			verbose=-v
			;;
		-V|--version)
			print_version
			;;
		--) shift; break
			;;
	esac
	shift
done

[ "$#" -gt 0 ] ||
	fatal "more arguments required"

workdir=
exit_handler()
{
	[ -z "$workdir" ] || rm -rf -- "$workdir"
}

workdir="$(mktemp -dt "$PROG.XXXXXXXXX")"
set_cleanup_handler exit_handler

for mbox in "$@"; do
	verbose "processing mailbox: $mbox"

	mkdir -p -- "$workdir/patchset"
	git mailsplit -o"$workdir/patchset" "$mbox" >/dev/null

	for f in "$workdir/patchset"/*; do
		[ -e "$f" ] ||
			break

		git mailinfo -k /dev/null "$workdir/patch" < "$f" > "$workdir/header"

		[ -s "$workdir/patch" ] ||
			continue

		while read -r header data; do
			if [ "$header" = 'Subject:' ]; then
				printf '%s\t%s\n' "$f" "$data"
				break
			fi
		done < "$workdir/header"

	done > "$workdir/patchlist"

	sort --field-separator='	' -k2,2 -o "$workdir/patchlist" "$workdir/patchlist"

	while IFS='	' read -r f _; do
		eval git am $git_am_args "$f"
	done < "$workdir/patchlist"

	rm -rf -- "$workdir/patchset"
done