#!/bin/bash
#
# SlackBuild for libgcrypt
# http://directory.fsf.org/security/libgcrypt.html
#
# 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="libgcrypt"
PKG_NAME="libgcrypt"
ARCH=${ARCH:=i486}
VERSION=${VERSION:=1.2.4}
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="$SRC_DIR/$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

# Import (minimized) signing key from
# http://www.gnupg.org/(en)/signature_key.html
gpg --import << EOKEY || exit $ERROR_GPG
-----BEGIN PGP PUBLIC KEY BLOCK-----

mI4EQ7f6xwEEANCZGXorXMkDKpNsRnf+ZhqHOPmDcEKPDkplcCL2PFACN7QaK4Re
oWvZ4mqmVOL3ZXU51zFNI9aD3JAIToET2jr2hGYWFExdBf9eaYgBeXZGUOnbJl1V
JDzWDGU6ZHNpwPiAAgYjpsoBgZCxbl7x0VtYukjc9vIkR/1GXGC4v9ohACCBVlCZ
tCZXZXJuZXIgS29jaCAoZGlzdCBzaWcpIDxkZDlqbkBnbnUub3JnPoi8BBMBAgAm
BQJDt/rIAhsDBQkFo5qABgsJCAcDAgQVAggDBBYCAwECHgECF4AACgkQU7Yg0Bzg
xjB5owQAh0MO0kuQ7hM6AKj8YK4bRGapHBmeIniaer9Y6vwXgErfDUci7BUQTxXo
FFTgKHHzBz39bzeStyQgTm5plGaOEJcJayIr07DaeBtcC/dMoVUJswybKMFtP7fU
z05PRKjChvxrWzhe/Yn6BAmPF+6YxQo2W98rzq0THS5wKJjXmHw=
=3fgc
-----END PGP PUBLIC KEY BLOCK-----
EOKEY

# Dowload source and its signature, if necessary
SRC="$SRC_NAME-$VERSION.tar.bz2"
URL="ftp://ftp.gnupg.org/gcrypt/libgcrypt/$SRC"

if [ ! -f "$SRC_DIR/$SRC" ] || ! bzip2 -t "$SRC_DIR/$SRC" 2> /dev/null; then
  wget "$URL" -O "$SRC_DIR/$SRC" || exit $ERROR_WGET
fi
if [ ! -f "$SRC_DIR/$SRC.sig" ]; then
  wget "$URL.sig" -O "$SRC_DIR/$SRC.sig" || exit $ERROR_WGET
fi

# Check source's signature
gpg --verify "$SRC_DIR/$SRC.sig" "$SRC_DIR/$SRC" || exit $ERROR_GPG

# Untar, configure, compile and install
cd "$SRC_DIR"
tar --no-same-owner --no-same-permissions -xvf "$SRC_DIR/$SRC" || exit $ERROR_TAR
cd "$PKG_SRC"
CFLAGS="$SLKCFLAGS" \
  CXXFLAGS="$SLKCFLAGS" \
  ./configure \
  --prefix="$PREFIX" --libdir="$LIBDIR" --infodir="$PREFIX/info" \
  --enable-m-guard --enable-noexecstack || exit $ERROR_CONF
make || exit $ERROR_MAKE
make install DESTDIR="$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 info files
if [ -d "$PKG/$PREFIX/info" ]; then
  ( cd "$PKG/$PREFIX/info"
    rm -f dir
    gzip -9 *
  )
fi

# Install documentation
DOCS="AUTHORS BUGS COPYING* ChangeLog INSTALL NEWS README* THANKS TODO VERSION"
mkdir -p "$PKG/$PREFIX/doc/$PKG_NAME-$VERSION" || exit $ERROR_MKDIR
cp -a $DOCS "$PKG/$PREFIX/doc/$PKG_NAME-$VERSION"

# 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-----------------------------------------------------|
libgcrypt: libgcrypt (Cryptographic library)
libgcrypt:
libgcrypt: Libgcrypt is a general purpose cryptographic library based on the
libgcrypt: code from GnuPG. It provides functions for all cryptographic
libgcrypt: building blocks: symmetric ciphers, hash algorithms, MACs, public
libgcrypt: key algorithms, large integer functions, random numbers and a lot
libgcrypt: of supporting functions.
libgcrypt:
libgcrypt: For more information,
libgcrypt: http://directory.fsf.org/security/libgcrypt.html
libgcrypt:
EODESC

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