#!/bin/bash
#
# slackbuild for qemu, by Rudson R. Alves
# requires: none
# tested: qemu-0.9.0

CWD=`pwd`

# ----  Inicializa variáveis com o slackbuild  ------------
if [ -e ~/.slackbuildrc ]; then
  source ~/.slackbuildrc
elif [ -e /etc/slackbuildrc ]; then
  source /etc/slackbuildrc
fi

# --------  Variáveis de controle de versão  --------------
# Nome da fonte para a qual o slackbuild foi construído e
# o seu md5sum
SRC_ORIG="qemu-0.9.0.tar.gz"
#MD5_ORIG=""
PACKAGE_ORIG=`echo $SRC_ORIG | sed -r 's/(.*)-(.*)\.(.*\..*)$/\1/'`
VERSION_ORIG=`echo $SRC_ORIG | sed -r 's/(.*)-(.*)\.(.*\..*)$/\2/'`
   EXTENSION=`echo $SRC_ORIG | sed -r 's/(.*)-(.*)\.(.*\..*)$/\3/'`

# -------  Códigos de erro para o createpkg  --------------
ERROR_WGET=31;      ERROR_MAKE=32;      ERROR_INSTALL=33
ERROR_MD5=34;       ERROR_CONF=35;      ERROR_HELP=36
ERROR_TAR=37;       ERROR_MKPKG=38;     ERROR_GPG=39
ERROR_PATCH=40;     ERROR_VCS=41

# ---------  Inicializa variáveis de entrada  -------------
PACKAGE=$PACKAGE_ORIG
ARCH=${ARCH:=i486}
SRC_DIR=${SRC:=$CWD}
VERSION=${VERSION:=$VERSION_ORIG}
SRC=$PACKAGE-$VERSION.$EXTENSION
BUILD=${BUILD:=1rud}
TMP=${TMP:=/tmp}
REPOS=${REPOS:=$TMP}
PREFIX=${PREFIX:=/usr}
OPTCONF=${OPTCONF:="--enable-alsa"}
MD5=${MD5:=$MD5_ORIG}
URL=${URL:="http://fabrice.bellard.free.fr/qemu/$SRC"}

# ----------------  Download fontes  ----------------------
# Fonte a ser compilada, com o path
SOURCE=$SRC_DIR/$PACKAGE/$SRC
# Verifica existência do pacote em $SRC em $SRC_DIR
if [ ! -e $SOURCE ]; then
    wget "$URL" -P "$SRC_DIR/$PACKAGE/" || exit $ERROR_WGET
fi

# ------------------  Checa md5sum  -----------------------
#if [ "$SRC_ORIG" = "$SRC" -o "$MD5" != "$MD5_ORIG" -a "$MD5" != "no" ]; then
#    SUM=`md5sum $SOURCE | awk '{print $1}'`
#    [ "$SUM" != "$MD5" ] && exit $ERROR_MD5
#fi

# -----------------  ARCH e LIBDIR  -----------------------
# Define LIBDIR
LIBDIR=$PREFIX/lib
# Seleciona flags para o compilador
if [ "$ARCH" = "i386" ]; then
    SLKCFLAGS="-O2 -march=i386 -mtune=i686"
elif [ "$ARCH" = "i486" ]; then
    SLKCFLAGS="-O2 -march=i486 -mtune=i686"
elif [ "$ARCH" = "i686" ]; then
    #SLKCFLAGS="-O2 -march=i686"
    SLKCFLAGS="-O2 -march=i486 -mtune=i686"
elif [ "$ARCH" = "s390" ]; then
    SLKCFLAGS="-O2"
elif [ "$ARCH" = "x86_64" ]; then
    SLKCFLAGS="-O2"
    LIBDIR="$PREFIX/lib64"
fi

# --------------  Desempacota fontes  ---------------------
# Desempacota fontes em PKG_SRC=$TMP/$PACKAGE-source
PKG_SRC=$TMP/$PACKAGE-source
rm -rf $PKG_SRC 2>/dev/null
mkdir -p $PKG_SRC
# Desempacota $SOURCE em $TMP/$PACKAGE-source
tar xvf $SOURCE -C $PKG_SRC || exit $ERROR_TAR

# Pega o nome do diretório das fontes independente de sua
# estrutura (package-version...)
PKG_DIR="$PKG_SRC/$( ls $PKG_SRC/ )"
cd $PKG_DIR

# --------------  Configura programa  ---------------------
# Configura programa
CFLAGS="$SLKCFLAGS" ./configure --prefix=$PREFIX --libdir=$LIBDIR $OPTCONF || exit $ERROR_CONF

# ----------------  Compila programa  ---------------------
make -j1 || exit $ERROR_MAKE

# -------------  Diretório Temporário  --------------------
# Cria diretório temporário para construção do pacote
PKG=$TMP/$PACKAGE
rm -rf $PKG
mkdir -p $PKG

# ---------------  Instala programa  ----------------------
# Instala programa em diretório temporário
make install prefix=$PKG/$PREFIX \
             bindir=$PKG/$PREFIX/bin \
             mandir=$PKG/$PREFIX/man \
             datadir=$PKG/$PREFIX/share/qemu \
             docdir=$PKG/$PREFIX/doc/qemu-$VERSION || exit $ERROR_INSTALL

# ------------------- gzip manuais ------------------------
gzip -r $PKG/$PREFIX/man/*

# -----------------  Stripa código  -----------------------
cd $PKG
find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null

# ----------------  Cria slack-desc  ----------------------
mkdir $PKG/install
cat << EOF > $PKG/install/slack-desc
# HOW TO EDIT THIS FILE:
# The "handy ruler" below makes it easier to edit a package description.  Line
# up the first '|' above the ':' following the base package name, and the '|' on
# the right side marks the last column you can put a character in.  You must make
# exactly 11 lines for the formatting to be correct.  It's also customary to
# leave one space after the ':'.

     |--------handy-ruler------------------------------------------------------|
qemu: QEMU package by Rudson R. Alves <rudsonalves[a]yahoo.com.br>
qemu:
qemu: QEMU is a FAST! processor emulator using dynamic translation to achieve
qemu: good emulation speed.
qemu:
qemu: QEMU has two operating modes:
qemu:  * Full system emulation. In this mode, QEMU emulates a full system
qemu:    (for  example  a  PC),  including  one  or  several processors and
qemu:    various  peripherals.
qemu:  * User mode emulation (Linux host only). In this mode, QEMU can
qemu:    launch Linux processes compiled for one CPU on another CPU.
EOF

# -----------------  Documentações  -----------------------
# Criar diretório de documentação
PKG_DOC=$PKG/usr/doc/$PACKAGE-$VERSION
mkdir -p $PKG_DOC
cp $PKG_DIR/{COPYING,COPYING.LIB,Changelog,LICENSE,README,README.distrib,TODO,VERSION} $PKG_DOC

# ---------------  Constroi o pacote  ---------------------
makepkg -c y -l y $REPOS/$PACKAGE-$VERSION-$ARCH-$BUILD.tgz || exit $ERROR_MKPKG

# -----------  Remove arquivos temporários  ---------------
if [ "$CLEANUP" = "yes" ]; then
    rm -rf $PKG $PKG_SRC
fi