#!/bin/bash

# Copyright (C) 2011 by Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
# Copyright (C) 2012 by Reinhard Tartler <siretart@tauware.de>
#
# This 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 3 of the License, or
# (at your option) any later version.
#
# This 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.

# Thanks to Jonas Smedegaard <dr@jones.dk> for inspiration...

# Formatting/cleanups by siretart in December 2012

set -e

usage() {
    echo "To be called at the project root of an nx-libs checkout"
    echo "usage: $(basename "$0") {<release-version>,HEAD} {server|client}"
    exit 1
}

PROJECT="nx-libs"
NULL=""

test -d .git || usage
test -f debian/Makefile.nx-libs || usage
RELEASE="$1"
test -n "${RELEASE}" || usage
CHECKOUT="$2"
test -n "$CHECKOUT" || usage

if [ "x$CHECKOUT" = "xserver" ] || [ "x$CHECKOUT" = "xfull" ]; then
	MODE="full"
	CHECKOUT="redist-server/${RELEASE}"
	RELEASE_SUFFIX='-full'
elif [ "x$CHECKOUT" = "xclient" ] || [ "x$CHECKOUT" = "xlite" ]; then
	MODE="lite"
	CHECKOUT="redist-client/${RELEASE}"
	RELEASE_SUFFIX='-lite'
else
	usage
fi

if [ x"$RELEASE" == "xHEAD" ]; then
    CHECKOUT=HEAD
fi

if ! git rev-parse --verify -q "$CHECKOUT" >/dev/null; then
    echo "   '${RELEASE}' is not a valid release number because there is no git tag named $CHECKOUT."
    echo "   Please specify one of the following releases:"
    echo "HEAD"
    git tag -l | grep  ^redist | cut -f2 -d/ | sort -u
    exit 1
fi

TARGETDIR=".."

MANIFEST="$(mktemp)"
TEMP_DIR="$(mktemp -d)"

trap "rm -f \"${MANIFEST}\"; rm -rf \"${TEMP_DIR}\"" 0

# create local copy of Git project at temp location
git archive --format=tar ${CHECKOUT} --prefix=${PROJECT}-${RELEASE}/ | ( cd $TEMP_DIR; tar xf - )

echo "Created tarball for $CHECKOUT"

cd "$TEMP_DIR/${PROJECT}-${RELEASE}/"

mkdir -p doc/applied-patches

# prepare patches for lite and full tarball
if [ "x$MODE" = "xfull" ]; then
    find debian/patches  | sort | egrep "(debian/patches/[0-9]+_.*\.(full|full\+lite)\.patch)" | while read file
    do
        cp -v $file doc/applied-patches
        echo ${file##*/} >> doc/applied-patches/series
    done
    mkdir -p ./etc/
    cp -v debian/rgb ./etc/
    cp -v debian/nxagent.keyboard ./etc/
    cp -v debian/x2goagent.keyboard ./etc/
    cp -v debian/VERSION ./VERSION.x2goagent
else
    rm -Rf "nxcompshad"*
    rm -Rf "nxcompext"*
    rm -Rf "nx-X11"*
    find debian/patches | sort | egrep "(debian/patches/[0-9]+_.*\.full\+lite\.patch)" | while read file
    do
        cp -v $file doc/applied-patches
        echo ${file##*/} >> doc/applied-patches/series
    done
fi
cp -v debian/VERSION ./nxcomp/VERSION
cp -v debian/COPYING.full+lite COPYING
cp -v debian/nxagent.keyboard nxagent.keyboard
cp -v debian/x2goagent.keyboard x2goagent.keyboard

# apply all patches shipped in debian/patches and create a copy of them that we ship with the tarball
if [ -s "doc/applied-patches/series" ]; then
    QUILT_PATCHES=doc/applied-patches quilt --quiltrc /dev/null push -a -q
else
    echo "No patches applied at all. Very old release?"
fi

# very old release did not add any README
for f in $(ls README* 2>/dev/null); do
    mv -v $f doc/;
done

mkdir -p bin/
if [ "$MODE" = "lite" ]; then
    # copy wrapper script nxproxy only into tarball
    cp -v debian/wrappers/nxproxy bin/
else
    # copy wrapper scripts into tarball
    for w in $(ls debian/wrappers/* 2>/dev/null); do
        cp -v $w bin/
    done
    # provide a default keystrokes.cfg file
    mkdir -p etc
    test -f etc/keystrokes.cfg || test -f debian/keystrokes.cfg && cp -v debian/keystrokes.cfg etc/keystrokes.cfg
fi

mv -v debian/changelog doc/changelog

# copy the top-level makefile if no quilt patch created it before
test -f Makefile || test -f debian/Makefile.nx-libs && cp -v debian/Makefile.nx-libs Makefile
test -f replace.sh || test -f debian/Makefile.replace.sh && cp -v debian/Makefile.replace.sh replace.sh



#### stuff we do not needed
UNUSED_FOLDERS=`cat debian/CODE-REDUCTION_CLEANUP-UNUSED`
CLEANUP_FOLDERS=`cat debian/CODE-REDUCTION_CLEANUP-BRUTAL`
UNNEEDED_BACKUPS=`cat debian/CODE-REDUCTION_CLEANUP-BACKUPFILES`
PRESERVE_SYMLINKED_FILES=`cat debian/CODE-REDUCTION_PRESERVE-SYMLINKED`
PRESERVE_INCLUDED_FILES=`cat debian/CODE-REDUCTION_PRESERVE-INCLUDED`
PRESERVE_NEEDED_FILES=`cat debian/CODE-REDUCTION_PRESERVE-NEEDED`

# remove folders that we do not want to roll into the tarball
rm -Rf ".pc/"
rm -Rf "debian/"

mkdir -p .preserve/
for path in ${PRESERVE_SYMLINKED_FILES} ${PRESERVE_INCLUDED_FILES} ${PRESERVE_NEEDED_FILES}; do
	if [ ! -d $path ]; then
		path_dirname=$(dirname "$path")
	else
		path_dirname="$path"
	fi
	mkdir -vp ".preserve/$path_dirname"
	cp -av "$path" ".preserve/$path"
done

for path in ${UNUSED_FOLDERS} ${CLEANUP_FOLDERS} ${UNNEEDED_BACKUPS}; do
    rm -R "$path"
done

# re-create the to-be-preserved files
cp -a .preserve/* ./
rm -Rf .preserve/

# remove files, that we do not want in the tarballs (build cruft)
rm -Rf nx*/configure nx*/autom4te.cache*

cd $OLDPWD

# create target location for tarball
mkdir -p "$TARGETDIR/_releases_/source/${PROJECT}/"

# roll the ball...
cd "$TEMP_DIR"
find "${PROJECT}-${RELEASE}" -type f | sort > "$MANIFEST"
cd $OLDPWD

tar c -C "$TEMP_DIR" \
    --owner 0 \
    --group 0 \
    --numeric-owner \
    --no-recursion \
    --files-from "$MANIFEST" \
    --gzip \
    > "$TARGETDIR/_releases_/source/${PROJECT}/${PROJECT}-${RELEASE}${RELEASE_SUFFIX}.tar.gz" \

echo "$TARGETDIR/_releases_/source/${PROJECT}/${PROJECT}-${RELEASE}${RELEASE_SUFFIX}.tar.gz  is ready"