#!/bin/sh
# httpup-repgen - One way sync from an http server to a local directory 
# 
# Copyright 2003-2005 (c) Johannes Winkelmann, # jw@tks6.net
#
# - Filtering code adapted from Per Liden's pkgmk
# - optimized and made portable (sh-compliant) by Han Boetes


# The repo file is place on the server. httpup downloads it,
# makes the update and afterwards moves it to the REPOCURRENTFILE
# which keeps track of the files which have been checked out. The
# REPOCURRENTFILE contains only file names
REPOFILE=REPO
REPOCURRENTFILE=REPO.CURRENT

VERSION=0.8

info()
{
    echo $*
}

debug()
{
    return # echo $*
}

printUsage()
{
    cat << EOF
httpup-repgen $VERSION
  Copyright (c) 2003 Johannes Winkelmann

Usage:
  httpup-repgen [directory]
EOF
    exit -1
}

generateRepoFile()
{
    dir=${1:-.}
    if [ ! -d $dir ]; then
	echo "Can't generate repository for '$dir': No such directory"
	exit -2
    fi
    echo "Generating repository for directory '$dir'"

    OLDPWD=$PWD
    cd $dir
    rm -f $REPOFILE || exit -3

    IGNORE_FILE=.httpup-repgen-ignore
    if [ -r $HOME/$IGNORE_FILE ]; then
        FILTER="grep -E -v -f $HOME/$IGNORE_FILE"
    else
        FILTER="cat"
    fi
    if [ -r $IGNORE_FILE ]; then
        FILTER_LOCAL="grep -E -v -f $IGNORE_FILE"
    else
        FILTER_LOCAL="cat"
    fi
    FILTER_OWN="egrep -v ($REPOFILE|$REPOCURRENTFILE|$IGNORE_FILE)"

    find . -type d ! -name . -printf "%P\n"|$FILTER|$FILTER_LOCAL|$FILTER_OWN|\
    	awk '{print "d:"$1}' > $REPOFILE
    files="$(find . -type f -printf "%P\n"|$FILTER|$FILTER_LOCAL|$FILTER_OWN)"
    if [ -n "$files" ]; then
        echo $files|xargs md5sum|awk '{print "f:"$1":"$2}' >> $REPOFILE
    fi

    cd $OLDPWD
}

case $1 in
    -*)
	printUsage
	;;
    *)
	generateRepoFile $1
	;;
esac