#!/bin/bash

# Default "configure" args.  They will be overridden with the contents of a
# CONFIGURE_ARGS file in the source directory.
CONFIGURE_ARGS="--enable-debug --enable-depend --enable-cassert --enable-nls --cache-file=/home/alvherre/tmp/pgconfig.@TREE@.cache --enable-thread-safety --with-python --with-perl --with-tcl --with-openssl --with-libxml"

# The root directory, where everything lies.  Defaults to $HOME/CVS/pgsql,
# but can be changed by the PGROOT environment variable.
ROOT=${PGROOT-/pgsql}

# do we have a diff coloring utility?
for prog in cdiff colordiff; do
	which $prog >/dev/null 2>/dev/null
	if [ $? == 0 ]; then
#		COLORDIFF=`which $prog`
		break
	fi
done

# If the first argument is "_commands", return the list of known commands
if [ ! -z "$1" -a "$1" == '_commands' ]; then
    for i in config build install init server client check pcheck tags changelog rmderived update showdiff touchchanged edit; do
	echo $i
    done
    exit
fi

# If the argument is a file, its contents is the real target.  Useful to have
# a "default" build, pointing to whatever is the current development tree.
if [ -f $ROOT/source/$1 ]; then
	DIR=`cat $ROOT/source/$1`
else
	DIR=$1
fi

SRCDIR=$ROOT/source/$DIR
INSTDIR=$ROOT/install/$DIR
BUILDDIR=$ROOT/build/$DIR
PGDATADIR=$INSTDIR/data
export LD_LIBRARY_PATH=$INSTDIR/lib

if [ -z "$DIR" ]; then
	LIST=`cd "$SRCDIR" ; find . -maxdepth 1 -mindepth 1 -type d`
	echo "I need an argument -- one from:"
	for i in $LIST; do
		echo -n " "`basename $i`
	done | (fmt 2>&1 || true)
	echo ""
	exit
fi
PGPORT=$((55432+$(echo $BUILDDIR | sed -e 's/^[^0-9]*\([0-9]*\).*$/\1/' -e 's/^0*//' -e 's/^$/0/' )))

# Miscelaneous functions

check_srcdir() {
	if [ ! -d $SRCDIR ]; then
		echo "The first argument must be a source directory" >&2 
		ls $ROOT/source >&2
		exit
	fi
}

check_blddir() {
	if [ ! -d $BUILDDIR ]; then
		echo "The first argument must be a VPATH build directory" >&2
		ls $ROOT/build >&2
		exit
	fi
}

check_backend() {
	backend=$BUILDDIR/src/backend/postgres
	if [ ! -f $backend ]; then
		echo "The backend must exist at $backend" >&2
		exit
	fi
}

check_instdir() {
	if [ ! -x $INSTDIR/bin/postmaster ]; then
		echo "$DIR debe ser un directorio de instalación" >&2
		exit
	fi
}

runpg_config() {
	check_srcdir
	if [ -d $BUILDDIR ]; then
		echo -n "Desea eliminar $BUILDDIR (y/n)? "
		unset removed
		read answer
		if [ ! -z "$answer" ]; then
			if [ "$answer" = 's' -o "$answer" = 'y' ]; then
				rm -fr $BUILDDIR
				removed=t
			fi
		fi
		if [ -z "$removed" ]; then
			exit
		fi
	fi
	mkdir $BUILDDIR
	if [ -f $SRCDIR/CONFIGURE_ARGS ]; then
		CONFIGURE_ARGS=`cat $SRCDIR/CONFIGURE_ARGS`
	fi
	CONFIGURE_ARGS=${CONFIGURE_ARGS//@TREE@/$DIR}
	cd $BUILDDIR
	echo $SRCDIR/configure $CONFIGURE_ARGS --prefix=$INSTDIR --with-pgport=$PGPORT
	$SRCDIR/configure $CONFIGURE_ARGS --prefix=$INSTDIR --with-pgport=$PGPORT
	make -C src -s distprep
	cd "$OLDPWD"
}

runpg_build() {
	check_srcdir
	check_blddir
	cd $BUILDDIR
	LC_ALL=C make -j3 2>&1 >> $BUILDDIR/build.out | tee -a $BUILDDIR/build.err
	LC_ALL=C make -j3 -C contrib 2>&1 >> $BUILDDIR/build.out | tee -a $BUILDDIR/build.err
	cd "$OLDPWD"
}

runpg_install() {
	check_backend
	cd $BUILDDIR
	LC_ALL=C make -j3 install 2>&1 >> $BUILDDIR/build.out | tee -a $BUILDDIR/build.err
	LC_ALL=C make -j3 -C contrib install 2>&1 >> $BUILDDIR/build.out | tee -a $BUILDDIR/build.err
	cd "$OLDPWD"
}


# Select the action based on the parameters
case "$2" in
    config)
	runpg_config
	exit $?
	;;

    build)
	runpg_build
	exit $?
	;;

    install)
    	runpg_install
	exit $?
	;;

    init)
	check_instdir
	rm -fr $PGDATADIR
	$INSTDIR/bin/initdb -D $PGDATADIR
	exit $?
	;;

    server)
	check_instdir
	if [ ! -z $DISPLAY ]; then
		echo -ne "\033]0;$1 server\007"
	fi
	ulimit -c unlimited
	PGDATA=$PGDATADIR exec $INSTDIR/bin/postmaster
	exit
	;;

    client)
	check_instdir
	export PATH=$INSTDIR/bin:$PATH
	export PGDATA=$PGDATADIR
	if [ ! -f $PGDATA/db_created ]; then
		createdb &&
		createlang plpgsql &&
		createlang plperl &&
		createlang pltcl &&
		createlang plpythonu &&
		touch $PGDATA/db_created
	fi
	PGCMD=psql
	if [ ! -z "$DISPLAY" ]; then
		echo -ne "\033]0;$1 client\007"
	fi
	psql
	exit
	;;

    check)
	check_instdir
	make -C $BUILDDIR/src/test/regress installcheck
	;;

    contribcheck)
	check_instdir
	make -s -C $BUILDDIR/contrib installcheck
	;;
	
    pcheck)
	check_instdir
	cd $BUILDDIR/src/test/regress
	make -C $BUILDDIR/src/test/regress installcheck-parallel
	;;

    tags)
	check_srcdir
	cd "$SRCDIR"
	echo "getting file list for cscope ..."
	find $SRCDIR $BUILDDIR \( -name "*.[chly]" -o -iname "*makefile*" -o -name "*.mk" -o -name "*.in" -o -name "*.sgml" -o -name "*.sh" -o -name "*.sql" \) -type f > $SRCDIR/cscope.files
	echo "building cscope database ..."
	cscope -b
	echo "building tags file ..."
	ctags -R
	echo "done"
	;;

    changelog)
	check_srcdir
	cd "$SRCDIR"
	if [ ! -d CVS ]; then
		echo "operation is valid only on CVS trees" 1>&2
		exit -1
	fi
	common_args="--revisions --no-indent --no-wrap --separate-header"
	branch_arg=""
	branch=$(cvs status configure.in | grep 'Sticky Tag' | awk '{print $3}')
	if [ $branch != "(none)" ]; then
		branch_arg="--follow $branch"
	fi
	if [ ! -f ChangeLog ]; then
		cvs2cl $common_args $branch_arg
	else
		cvs2cl $common_args $branch_arg --accum
	fi
	;;

    rmderived)
	check_srcdir
	cd "$SRCDIR"
	find . -name .cvsignore | while read line
	do
		dir=$(dirname $line)
		cd $dir
		rm -fv `cat .cvsignore`
		cd "$OLDPWD"
	done
	;;

    update)
	check_srcdir
	cd "$SRCDIR"
	if [ -d CVS ]; then
		cvs update -Pd
	elif [ -d .svn ]; then
		svn update
	elif [ -d .git ]; then
		echo "not supported for git trees" >&2
		exit -1
	fi

	;;

    showdiff)
	check_srcdir
	cd "$SRCDIR"
	if [ ! -z "$COLORDIFF" ]; then
		pipe="$COLORDIFF"
	else
		pipe=cat
	fi
	if [ -d CVS ]; then
		cvs -q diff | $pipe | less -r
	elif [ -d .svn ]; then
		svn diff | $pipe | less -r
	elif [ -d .git ]; then
		git diff
	fi
	;;

    touchchanged)
	check_srcdir
	cd "$SRCDIR"
	if [ -d CVS ]; then
		cvs -q diff | grep ^Index | cut -d" " -f2 | xargs touch
	elif [ -d .svn ]; then
		svn diff | grep ^Index | cut -d" " -f2 | xargs touch
	fi
	;;

    edit)
	check_srcdir
	cd "$SRCDIR"
	vi -g &
	;;

    *)
	check_instdir
	echo "export PATH=$INSTDIR/bin:$PATH"
	echo "export MANPATH=$INSTDIR/share/man"
	echo "export PGDATA=`echo $PGDATADIR`"
	echo "export PGPORT=$PGPORT"
	echo "export PGLIBS=$INSTDIR/lib"
	echo "export PGINCLUDE=$INSTDIR/include"
	;;
esac