#!/bin/bash
#
# Blueprint to build elvis-2.2_0.
#
# elvis is a 'vi' editor clone.
#
# Source code is from: ftp://ftp.cs.pdx.edu/pub/elvis/
#
# This architect blueprint is copyright (c)2003-2004 David Horton
# dhorton@nospam.speakeasy.net
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to: 
#
#   Free Software Foundation, Inc.
#   59 Temple Place - Suite 330
#   Boston, MA 02111-1307, USA
#
#
# 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
#
# This is not one of the packages that can be configured and built
# completely outside of the source tree.  So in order to leave the
# original source untouched, the contents of $SRC_DIR are first copied
# to $BUILD_DIR.  The copy in $BUILD_DIR is then modified to suit the
# configuration.
cp -dpR $SRC_DIR/* $BUILD_DIR
#
# Configure the package.
export CC="gcc -mcpu=i386"
cd $BUILD_DIR
MANPATH=/usr/share/man \
./configure \
  --host=i386-pc-linux-gnu \
  --libs=-lncurses \
  --prefix=/usr \
  --without-gnome \
  --without-x \
  --without-xft
# Make changes to the Makefile so that /etc/elvis/ is created in the
# staging area and not in the development system's /etc directory.
mv Makefile Makefile.orig
sed -e 's!/etc/elvis!$(ETCDIR)/elvis!g' Makefile.orig >Makefile
#
# 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
#
# Check return code and bail if it looks bad.
if [ $? -gt 0 ]; then
  echo "$PKG_NAME: Build failed!"
  exit 16
fi
#
# Install into staging area.
mkdir -p $STAGING_DIR/etc
mkdir -p $STAGING_DIR/usr/share/man/man1
make \
  ETCDIR=$STAGING_DIR/etc \
  MANPATH=$STAGING_DIR/usr/share/man \
  PREFIX=$STAGING_DIR/usr \
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
#
# Post-install tweaking
#
# The etc/elvis/README file needs to be adjusted because every reference
# to a path now says /var/tmp/staging/elvis-2.2_0/<path>.
mv $STAGING_DIR/etc/elvis/README $STAGING_DIR/etc/elvis/README.orig
sed \
  -e "s#$STAGING_DIR##g" \
  -e "s/echo //g" \
  $STAGING_DIR/etc/elvis/README.orig > $STAGING_DIR/etc/elvis/README
rm $STAGING_DIR/etc/elvis/README.orig
#
# The same thing needs to be done to usr/share/elvis/README.
mv $STAGING_DIR/usr/share/elvis/README $STAGING_DIR/usr/share/elvis/README.orig
sed \
  -e "s#$STAGING_DIR##g" \
  $STAGING_DIR/usr/share/elvis/README.orig > $STAGING_DIR/usr/share/elvis/README
rm $STAGING_DIR/usr/share/elvis/README.orig
#
# Make symbolic links for ex, vi and view that point to elvis.
ln -s elvis $STAGING_DIR/usr/bin/ex
ln -s elvis $STAGING_DIR/usr/bin/vi
ln -s elvis $STAGING_DIR/usr/bin/view
#
# Create manpages for ex, vi and view that open elvis(1) using the groff
# include directive.
echo ".so elvis.1" >$STAGING_DIR/usr/share/man/man1/ex.1
echo ".so elvis.1" >$STAGING_DIR/usr/share/man/man1/vi.1
echo ".so elvis.1" >$STAGING_DIR/usr/share/man/man1/view.1
#
# end of elvis blueprint