#!/bin/bash
#
# ELS script to build perl-5.10.0. 
#
# Perl is a popular programming language.
#
# Source is from ftp://ftp.cpan.org/pub/CPAN/src
#
#
# This script is public domain software and may be freely copied.
#
# This script 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.
#
#
# Define the package name, source directory, build directory and
# staging directory paths.  Prefixes to directories may be overridden
# by setting shell variables SRC, BUILD and STAGING.  For example,
# doing "export SRC=/root/foo" before calling this script will override
# the default /usr/src and set SRC_DIR to /root/foo/$PKG_NAME instead.
# 
PKG_NAME=$(basename $0)
SRC_DIR=${SRC:-/usr/src}/$PKG_NAME
BUILD_DIR=${BUILD:-/var/tmp/build}/$PKG_NAME
STAGING_DIR=${STAGING:-/var/tmp/staging}/$PKG_NAME

# Check that the source directory really exits and bail out if not.
if ! [ -d $SRC_DIR ]; then
  echo "$PKG_NAME: Cannot find source code directory $SRC_DIR."
  exit 1
fi

# Do not overwrite existing build directory.
if [ -d $BUILD_DIR ]; then
  echo "$PKG_NAME: Build directory $BUILD_DIR already exists."
  exit 2
else
  mkdir -p $BUILD_DIR
fi

# Do not overwrite existing staging directory.
if [ -d $STAGING_DIR ]; then
  echo "$PKG_NAME: Staging directory $STAGING_DIR already exists."
  exit 4
else
  mkdir -p $STAGING_DIR
fi

# Can't build outside source tree.
cp -dpR $SRC_DIR/* $BUILD_DIR

# Configure the package for FHS compliance and i586 processor.
cd $BUILD_DIR
./Configure \
  -Dcc='gcc -march=i586' \
  -Dprefix=/opt/$PKG_NAME \
  -Doptimize='-O2' \
  -des

# Check return status and bail out if it's non-zero.
if [ $? -gt 0 ]; then
  echo "$PKG_NAME: Configuration failed!"
  exit 8
fi

# Build the package.
make && make test

# Check return code and bail if it looks bad.
if [ $? -gt 0 ]; then
  echo "$PKG_NAME: Build failed!"
  exit 16
fi

# Install.
make DESTDIR=$STAGING_DIR install

# Check return code and bail if it looks bad.
if [ $? -gt 0 ]; then
  echo "$PKG_NAME: Installation to staging area failed!"
  exit 32
fi

# Remove hard-linked man pages and use groff includes directive instead.
rm $STAGING_DIR/opt/$PKG_NAME/man/man1/c2ph.1
echo ".so pstruct.1" >$STAGING_DIR/opt/$PKG_NAME/man/man1/c2ph.1
rm $STAGING_DIR/opt/$PKG_NAME/man/man1/s2p.1
echo ".so psed.1" >$STAGING_DIR/opt/$PKG_NAME/man/man1/s2p.1

# Keep a copy of the license document.
install -D -o root -g root -m 644 $SRC_DIR/COPYING \
  $STAGING_DIR/opt/doc/$PKG_NAME/LICENSE

# Space saving tweaks
strip $STAGING_DIR/opt/$PKG_NAME/bin/a2p
strip $STAGING_DIR/opt/$PKG_NAME/bin/perl
gzip -r $STAGING_DIR/opt/$PKG_NAME/man
gzip -r $STAGING_DIR/opt/$PKG_NAME/doc

# Create the package
if ! [ "$PKG_COMMAND" = "" ]; then
  export $PKG_NAME $STAGING_DIR
  $PKG_COMMAND
else
  cd $STAGING_DIR
  tar -zcf ../$PKG_NAME.i586.tar.gz *
fi
#
# end of perl blueprint