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#!/bin/sh

MAINTDBDIR="<%= maintdb_dbdir %>"

function checkname()
{
    if [ -z "$1" ] ||
	echo "$1" | grep -q '[/*{}%]' ||
	echo "$1" | fgrep -q '..'
    then
	echo "Error: invalid package name." >&2
	exit 1
    fi
}

function maintnew()
{
    if [ a"$user" != "aroot" ]
    then
	echo "Error: new is only allowed to root." >&2
	exit 1
    fi
    checkname "$1"
    maintfile="$MAINTDBDIR/$1"
    if [ -f "$maintfile" ]
    then
	exit 0
    fi
    echo "$2" > "$maintfile"
}

function maintset()
{
    checkname "$1"
    maintfile="$MAINTDBDIR/$1"
    newmaint="$2"
    if ! [ -f "$maintfile" ]
    then
	echo "Error: package $1 does not exist in maintdb." >&2
	exit 1
    fi
    curmaint=$(cat "$maintfile")
    if [ a"$newmaint" = "anobody" ]
    then
	if [ a"$curmaint" = a"$user" ]
	then
	    echo "$newmaint" > "$maintfile"
	    exit 0
	else
	    echo "Error: cannot set maintainer for $1." >&2
	    exit 1
	fi
    elif [ a"$newmaint" = a"$user" ]
    then
	if [ a"$curmaint" = "anobody" ]
	then
	    echo "$newmaint" > "$maintfile"
	    exit 0
	else
	    echo "Error: cannot set maintainer for $1." >&2
	    exit 1
	fi
    else
	echo "Error: cannot set someone else as maintainer." >&2
	exit 1
    fi
}

function maintgetall()
{
    cd "$MAINTDBDIR"
    for file in *
    do
	echo "$file $(cat $file)"
    done
    exit 0
}

function maintget()
{
    if [ -z "$1" ]
    then
	maintgetall
    fi
    checkname "$1"
    maintfile="$MAINTDBDIR/$1"
    if [ -f "$maintfile" ]
    then
	cat "$maintfile"
    else
	echo "Error: package $1 does not exist in maintdb." >&2
	exit 1
    fi
}

user="$1"
action="$2"

if [ a"$action" = "anew" ]
then
    maintnew "$3" "$4"
elif [ a"$action" = "aset" ]
then
    maintset "$3" "$4"
elif [ a"$action" = "aget" ]
then
    maintget "$3"
else
    echo "Error: unknow command." >&2
    exit 2
fi