#!/bin/sh

# die: print message to stderr and exit with error code
#
# PARAMETERS
#   $1 $2 ... - message to be printed
die()
{
	echo "$CE$N: fatal error: $*$CN" >&2
	echo "For detailed log, see: $LOG"
	exit 1
}

warn()
{
	echo "$CE$N: warning: $*$CN" >&2
}

notice()
{
	echo "$CX$N: $*$CN" >&2
}

lx()
{
	notice "[exec]: $*"
	"$@"
}

# make sure we're not root
if test `id -u` = "0"
then
	die "Please install SBS in a user account, not as root"
fi

# enable colors only on terminal devices
TPUT="`which tput`"
if test -t 0 -a -t 1 -a -n "$TPUT"
then
    CI="`$TPUT setf 6 || true`"
    CE="`$TPUT setf 4 || true`"
    CX="`$TPUT setf 2 || true`"
    CN="`$TPUT sgr0 || true`"
else
    CI=''
    CE=''
    CX=''
    CN=''
fi

N="`basename \"$0\"`"

# default logging is none
LOG="$(mktemp /tmp/.sbs-install-XXXXXX)"
[ $? -eq 0 ] || { echo "$CE$N: error: unable to open log file$CN" >&2; exit 1; }
echo "SBS install begin" > "$LOG"
date >> "$LOG"
git rev-parse --short HEAD >> "$LOG"
echo >> "$LOG"

echo
echo "$CI""SBS install script$CN"
echo "$CI""git version: `git rev-parse --short HEAD`$CN"
echo "$CI""last commit: `git log HEAD^1.. | grep ^Date:`$CN"
echo "$CI""For help see: https://source.tizen.org$CN"
echo

check_email_and_complain()
{
	local email name

	# figure out the user's single ID
	while true
	do
		email="`git config --global --get user.email`"

		if [ "$email" ]
		then
			break
		fi

		echo "git username and email address are not set correctly."
		echo "SBS will configure these for you now."
		echo "Example name:  David Kim"
		echo "Example email: david.kim@your_company.com"
		echo
		echo -n "Your name: "
		read name
		echo -n "Your email: "
		read email
		git config --global user.name "$name"
		git config --global user.email "$email"
		echo
	done
}

copy_key_from_scratchbox()
{
	if ! test -f "$HOME/.ssh/id_rsa"
	then
		if test -f "/scratchbox/users/$USER/home/$USER/.ssh/id_rsa"
		then
			echo "Copying public key from old scratchbox install"
			mkdir -p "$HOME/.ssh"
			cp -f "/scratchbox/users/$USER/home/$USER/.ssh"/id_rsa* "$HOME/.ssh"
		fi
	fi
}

check_sbs_uptodate()
{
	local branch

	# update sbs
	echo -n "Updating sbs... "

	# using origin/master because this is the default setup by git
	(git fetch "$REMOTE""tools/sbs" master:origin/master -q >> "$LOG") || die "failed to fetch sbs repository"
	if ! git diff-index --quiet HEAD
	then
		echo
		echo
		echo "$CE""Files have been changed. Please checkin changes or remove them with:""$CN"
		echo "$CE""git reset --hard origin""$CN"
		echo
		die "Repository not clean"
	fi

	# check the current branch contains the latest we fetched from above
	branch=`git branch --contains origin/master 2> /dev/null | grep "^\\* "`
	if [ ! "$branch" ]
	then
		warn "Please update to origin. e.g. git reset --hard origin"
		die "Repository not up-to-date"
	fi

	echo "done"
}

# location of server with all our source
REMOTE=${SBS_INSTALL_REMOTE:-"download.tizen.org:"}

# our original cwd
ROOTDIR="`pwd`"

# no user compile options, thanks
unset CC CFLAGS LDFLAGS MAKE MAKEFLAGS PANTS

if [ ! "$SBS_INSTALL_LAX" ]
then
	check_email_and_complain
	copy_key_from_scratchbox
#check_sbs_uptodate
fi

# which distribution are we installing on?
cat /etc/lsb-release >> "$LOG" 2> /dev/null

INSTALLDIR=${SBS_INSTALL_DIR:-"$HOME/sbs-install"}
BUILDDIR="$ROOTDIR/Build"
SB2DIR="$BUILDDIR/scratchbox2"
QEMUDIR="$BUILDDIR/qemu"
DEBOOTDIR="$BUILDDIR/debootstrap"
LUTILDIR="$BUILDDIR/lutil"

missing=''
pkg-config --version >/dev/null 2>&1 || { missing="$missing pkg-config"; warn "pkg-config missing - dependency checks won't be accurate"; }
pkg-config --exists libxml-2.0 >/dev/null 2>&1 || missing="$missing libxml2-dev"
pkg-config --exists uuid >/dev/null 2>&1 || missing="$missing uuid-dev"
cpp --version >/dev/null 2>&1 || { missing="$missing cpp"; warn "cpp missing - dependency checks won't be accurate"; }
echo | cpp -include archive.h >/dev/null 2>&1 || missing="$missing libarchive-dev"
echo | cpp -include lzo/lzo1x.h >/dev/null 2>&1 || missing="$missing liblzo2-dev"
gcc --version >/dev/null 2>&1 || { missing="$missing gcc"; warn "gcc missing - dependency checks won't be accurate"; }
[ `uname -m` != 'x86_64' ] || echo '#include <asm/errno.h>' | gcc -m32 -xc -c -o /dev/null - >/dev/null 2>&1 || missing="$missing gcc-multilib"

if ! pkg-config --exists zlib >/dev/null 2>&1; then
	# Either pkg-config or zlib itself wasn't found (Debian provide .pc file, Ubuntu doesn't)
	# We have to check zlib existence manually.
	echo | cpp -include zlib.h >/dev/null 2>&1 || missing="$missing zlib1g-dev"
fi

# check for things needed to build scratchbox2
for prog in automake autoconf make fakeroot realpath; do
	$prog --version >/dev/null 2>&1 || missing="$missing $prog"
done

# check for dpkg-dev
if ! dpkg-architecture --version >/dev/null 2>&1; then
	missing="$missing dpkg-dev"
fi

[ -z "$missing" ] || die "please install required packages: $missing"

mkdir -p "$BUILDDIR"

git rev-parse HEAD > "$BUILDDIR/versions"

# download stuff
while read name
do
	srcfile="$BUILDDIR/$name.tar.gz"
	srcdir="$BUILDDIR/$name"
	echo -n "Downloading $name... "
	echo "Downloading $name" >> "$LOG"
	rm -rf "$srcdir"
	wget --no-check-certificate -P $BUILDDIR http://download.tizen.org/releases/1.0/sbs/$name.tar.gz
	mkdir "$srcdir"
	tar xzf "$srcfile" -C "$srcdir" --touch
	rm -f "$srcfile"
	echo "done"
done <<END
scratchbox2
qemu
debootstrap
lutil
END

# build scratchbox2
echo -n "Building scratchbox2... "
(cd "$SB2DIR" && make clean > /dev/null 2>&1)
(cd "$SB2DIR" && ./autogen.sh && ./configure && make 2>&1 ) >> "$LOG" || die "scratchbox2 build failed"
echo "done"
echo -n "Installing scratchbox2... "
(cd "$SB2DIR" && make install prefix="$INSTALLDIR" 2>&1 ) >> "$LOG" || die "scratchbox2 install failed"
echo "done"

# build qemu
echo -n "Building qemu... "
(cd "$QEMUDIR" && make clean > /dev/null 2>&1)
(cd "$QEMUDIR" && ./configure --target-list=arm-linux-user,i386-linux-user --disable-blobs --disable-uuid && make 2>&1) >> "$LOG" || die "qemu build failed"
echo "done"
echo -n "Installing qemu... "
(cd "$QEMUDIR" && make install prefix="$INSTALLDIR" 2>&1 ) >> "$LOG" || die "qemu install failed"
echo "done"

# build lutil and related tools
echo -n "Building lutil... "
(cd "$LUTILDIR" && ./autogen.sh && make prefix=/) >> "$LOG" || die "failed to build lutil"
(cd "$LUTILDIR" && make install prefix=/ DESTDIR="$INSTALLDIR" 2>&1 ) >> "$LOG" || die "lutil install failed"
echo "done"

# install debootstrap
echo -n "Installing debootstrap... "
(cd "$DEBOOTDIR" && fakeroot make devices.tar.gz) >> "$LOG" || die "failed to build debootstrap"
mkdir -p "$INSTALLDIR"/share/debootstrap/scripts/
cp -fd "$DEBOOTDIR"/scripts/* "$INSTALLDIR"/share/debootstrap/scripts/
cp -f "$DEBOOTDIR"/functions "$INSTALLDIR"/share/debootstrap
cp -f "$DEBOOTDIR"/devices.tar.gz "$INSTALLDIR"/share/debootstrap
cp -f "$DEBOOTDIR"/debootstrap "$INSTALLDIR"/bin/debootstrap
echo "done"

# update the sbs binary
echo -n "Installing sbs scripts... "
if [ -e "$INSTALLDIR"/sbs.list ]; then
    notice "removing old sbs installation files" >>"$LOG" 2>&1
    sort -r "$INSTALLDIR"/sbs.list |
    while read path; do
	if [ -d "$INSTALLDIR/$path" ]
	then
	    lx rmdir "$INSTALLDIR/$path" || true
	else
	    lx rm "$INSTALLDIR/$path" || true
	fi
    done >>"$LOG" 2>&1
    mv -f "$INSTALLDIR"/sbs.list  "$INSTALLDIR"/sbs.list.old
fi
mkdir -p "$INSTALLDIR"
make install DESTDIR="$INSTALLDIR" prefix=/ >"$INSTALLDIR/sbs.list" 2>>$LOG || die "failed to install SBS"
echo "done"

# save the versions, to enable OSS license compliance
cp -f "$BUILDDIR"/versions "$INSTALLDIR"

SBS_ROOTDIR=${SBS_ROOTDIR:-$HOME/sbs}
if ! test -d "$SBS_ROOTDIR"
then
	echo
	echo "$CX""Run $INSTALLDIR/bin/sbs -c to create your initial environment$CN"
	echo
else
	echo
	echo "$CX""SBS update successful$CN"
	echo
fi