#!/bin/bash

# This file is part of the aMule project.
#
# Copyright (c) 2003-2011 aMule Team ( admin@amule.org / http://www.amule.org )
# Copyright (c) 2004-2011 Jacobo Vilella (Jacobo221)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
#

###################################################################
#                                                                 #
#     linkcvs will link the whole cvs tree to the given path      #
#  allowing keeping several compilations from a single cvs tree   #
#                                                                 #
#    Warning: This script overwrites old files in target_path     #
#                                                                 #
###################################################################
#                                                                 #
#           Script valid as of 4rd June 2004 aMule CVS            #
#         Suggestions go to Jacobo221 at @amule dot .org          #
#                                                                 #
###################################################################
#                                                                 #
#     This code is distributed under terms of the GPL License     #
#               http://www.gnu.org/copyleft/gpl.html              #
#                                                                 #
###################################################################
#                                                                 #
#   EXEC is a list of the files which will be called as scripts   #
#       EXEC_NUMBER is the amount of EXEC files in the list       #
#    EXEC_PREFIX is the command to prefix the call of the EXEC    #
#   EXEC_POSTFIX is the command to postfix the call of the EXEC   #
#    COPY is a list of files which will be copies, not linked     #
#         Priviledge order (max to min): EXEC, COPY, CVS          #
#                                                                 #
###################################################################

EXEC_NUMBER=0
# The follwing four lines were needed for aMule versions previous to 2.0.0
# EXEC_NUMBER=1
# EXEC=("autogen.sh")
# EXEC_PREFIX=("original=\`readlink src/SharedFileList.h\` && cp -d --remove-destination \"\$original\" src/ && ")
# EXEC_POSTFIX=("ln -sf \"\$original\" src/SharedFileList.h")
COPY=""

if [ $# -ne 2 ]; then
        echo "`basename $0`: invalid number of arguments"
        echo "Try \``basename $0` <cvs_tree_path> <target_path>'"
	exit 1
elif [ ! -e "$1" ]; then
        echo "`basename $0`: $1 doesn't exist!"
	exit 2
elif [ ! -d "${1}/CVS" ]; then
        echo "`basename $0`: $1 isn't a CVS tree!"
	exit 3
elif [ ! -e "${1}/CVS/Entries" ]; then
        echo "`basename $0`: $1 has no Entries file!"
	exit 4
fi

SOURCE="$1"
TARGET="$2"

if [ "`echo \"$SOURCE\" | cut -c 1`" != "/" ] && [ "`echo \"$SOURCE\" | cut -c 1`" != "~" ]; then
                                        SOURCE="`pwd`/$SOURCE"
fi
if [ "`echo \"$TARGET\" | cut -c 1`" != "/" ] && [ "`echo \"$TARGET\" | cut -c 1`" != "~" ]; then
                                        TARGET="`pwd`/$TARGET"
fi

cvs_rec()
{
	local FILES=`cat "${SOURCE}/$1"/CVS/Entries | cut -f 2 -d "/" -s`
	# Alternative option would be to place `grep "^D/"` and `grep "^"`
	for file in $FILES; do
		if [ -d "${SOURCE}/${1}/$file" ]; then
			mkdir -p "${TARGET}/${1}/$file"
			cvs_rec "${1}/$file"
		else
			target="${TARGET}/${subfile/$SOURCE}/${1}"
			if [ ! -e "${SOURCE}/${1}/$file" ]; then
                                echo "${SOURCE}/${1}/$file not found!"
                        else
                                ln -sf "${SOURCE}/${1}/$file" "$target"
                        fi
		fi
	done
}

if [ ! -e "$TARGET" ]; then
        echo -n "$TARGET doesn't exist. Should I create it? [y/n]"
        read -s -n 1 opt
        if [ $opt = Y -o $opt = y ]; then
                echo " Copying..."
                mkdir -p "$TARGET"
        else
                echo "`basename $0`: target_path invalid"
                exit 5
        fi
fi

cvs_rec ""

for file in $COPY; do
        mkdir -p "${TARGET}/`dirname $file`"
        for subfile in ${SOURCE}/$file; do
                if [ ! -e "$subfile" ]; then
                        echo "$subfile not found!"
                else
                        # -d --remove-destination is esential for links handling
                        cp -d --remove-destination "$subfile" "${TARGET}/${subfile/$SOURCE}"
                fi
        done
done

i=0
while [ "$i" -lt "$EXEC_NUMBER" ]; do
        mkdir -p "${TARGET}/`dirname $file`"
        for subfile in "${SOURCE}"/${EXEC[$i]}; do
                if [ ! -e "$subfile" ]; then
                        echo "$subfile not found!"
                else
                        target="${TARGET}/${subfile/$SOURCE}"
                        rm -f "$target" # Necessary in case $target is a link
			echo ${EXEC_PREFIX[$i]} > "$target"
                        echo -n "$subfile && " >> "$target"
			echo ${EXEC_POSTFIX[$i]} >> "$target"
                        chmod a+x "$target"
                fi
        done
	i=`expr $i + 1`
done