#!/bin/bash
#
# SlackBuild for microcode_ctl
# http://urbanmyth.org/microcode/
#
# Author: Luis ( luis at riseup d0t net )
#

CWD=`pwd`

# Look for slackbuildrc
if [ -f ~/.slackbuildrc ]; then
  source ~/.slackbuildrc
elif [ -f /etc/slackbuildrc ]; then
  source /etc/slackbuildrc
fi

# Set variables
SRC_NAME="microcode_ctl"
PKG_NAME="microcode_ctl"
ARCH=${ARCH:=i486}
VERSION=${VERSION:=1.14}
BUILD=${BUILD:=1ls}
SRC_DIR=${SRC_DIR:=$CWD}
TMP=${TMP:=/tmp}
PKG=${PKG:=$TMP/package-$PKG_NAME}
REPOS=${REPOS:=$TMP}
PREFIX=${PREFIX:=/usr}
PKG_SRC=$SRC_NAME-$VERSION

# Set system libraries' path and optmization flags based on $ARCH
LIBDIR=$PREFIX/lib

if [ "$ARCH" = "i386" ]; then
  SLKCFLAGS="-O2 -march=i386 -mcpu=i686"
elif [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mcpu=i686"
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686"
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2"
  LIBDIR="$PREFIX/lib64"
fi

# Set error codes (used by 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;       ERROR_MKDIR=42

# Clean up any leftovers of previous builds
rm -rf $PKG_SRC 2> /dev/null
rm -rf $PKG 2> /dev/null

# Create directories, if necessary
mkdir -p $SRC_DIR || exit $ERROR_MKDIR
mkdir -p $PKG || exit $ERROR_MKDIR
mkdir -p $REPOS || exit $ERROR_MKDIR

# Dowload source, if necessary
SRC="$PKG_SRC.tar.gz"
URL="http://urbanmyth.org/microcode/$SRC"

if [ ! -f "$SRC_DIR/$SRC" ]; then
  wget "$URL" -O "$SRC_DIR/$SRC" || exit $ERROR_WGET
fi

# Untar, compile and install
tar --no-same-owner --no-same-permissions -xvf $SRC_DIR/$SRC -C $SRC_DIR || exit $ERROR_TAR
cd $SRC_DIR/$PKG_SRC
make all || exit $ERROR_MAKE
if [ ! -c /dev/cpu/microcode ]; then
  make device || exit $ERROR_MAKE
fi
make install DESTDIR=$PKG || exit $ERROR_INSTALL

# Strip binaries
( 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
)

# Compress and link manpages, if any
if [ -d $PKG/$PREFIX/man ]; then
  ( cd $PKG/$PREFIX/man
    for manpagedir in $(find . -type d -name "man*") ; do
      ( cd $manpagedir
        for eachpage in $( find . -type l -maxdepth 1) ; do
          ln -s $( readlink $eachpage ).gz $eachpage.gz
          rm $eachpage
        done
        gzip -9 *.?
      )
    done
  )
fi

# Compress info files, if any
if [ -d $PKG/$PREFIX/info ]; then
  ( cd $PKG/$PREFIX/info
    rm -f dir
    gzip -9 *
  )
fi

# Install documentation
DOCS="Changelog README intel-*.txt"
mkdir -p $PKG/$PREFIX/doc/$PKG_NAME-$VERSION || exit $ERROR_MKDIR
cp -a $DOCS $PKG/$PREFIX/doc/$PKG_NAME-$VERSION

# Move the initialization script to /etc/rc.d/, renaming it to rc.*
( cd $PKG/etc/rc.d
  mv -f init.d/microcode_ctl rc.microcode_ctl.new
  rmdir init.d/
)

# Patch the initialization script to be less verbose
( cd $PKG
  patch -Np1 < $CWD/microcode_ctl-less_verbose.patch || exit $ERROR_PATCH
)

# Add package description (slack-desc)
mkdir -p $PKG/install || exit $ERROR_MKDIR
cat << EODESC > $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-------------------------------------------------|
microcode_ctl: microcode_ctl
microcode_ctl:
microcode_ctl: Decodes and sends new microcode to the kernel driver to be
microcode_ctl: uploaded to Intel IA32 family processors (Pentium Pro, PII,
microcode_ctl: Celeron, PIII, Xeon, Pentium 4 etc, x86_64). It depends on the
microcode_ctl: Linux kernel microcode driver.
microcode_ctl:
microcode_ctl: The microcode update is volatile and needs to be uploaded on
microcode_ctl: each system boot.
microcode_ctl:
microcode_ctl: For more information, http://urbanmyth.org/microcode/
EODESC

# Add a post-installation script (doinst.sh)
cat << EOSCRIPT > $PKG/install/doinst.sh
config() {
  NEW="\$1"
  OLD="\$(dirname \$NEW)/\$(basename \$NEW .new)"
  # If there's no config file by that name, mv it over
  if [ ! -r \$OLD ]; then
    mv \$NEW \$OLD
  elif [ "\$(cat \$OLD | md5sum)" = "\$(cat \$NEW | md5sum)" ]; then
    # Toss the redundant copy
    rm \$NEW
  fi
  # Otherwise, we leave the .new copy for the admin to consider...
}

config etc/rc.d/rc.microcode_ctl.new
EOSCRIPT

# Build the package
cd $PKG
makepkg -l y -c n $REPOS/$PKG_NAME-$VERSION-$ARCH-$BUILD.tgz || exit $ERROR_MKPKG

# Delete source and build directories, if requested
if [ "$CLEANUP" == "yes" ]; then
  rm -rf $SRC_DIR/$PKG_SRC $PKG
fi