#!/bin/sh
# %Z%%M% %I% %E% SMI
#
# populate a source tree.
#
# We assume that we start out in a directory (presumably /usr/src)
# with the subdirectory 'SCCS_DIRECTORIES' which contains the SCCS source
# in the form:
#
#	...
#	stuff
#	stuff/SCCS
#	stuff/SCCS/(SCCS source files for stuff...)
#	stuff/morestuff
#	stuff/morestuff/SCCS
#	stuff/morestuff/SCCS/(SCCS source files for morestuff....)
#	...
#
# This script will make a directory tree rooted in this directory
# of the structure:
#
#	...
#	stuff
#	stuff/morestuff
#	...
# And add in, as relative path symbolic links the SCCS directories
# in the tree rooted in SCCS_DIRECTORIES...
#
# (e.g., stuff/SCCS is a symlink that points to ../SCCS_DIRECTORIES/stuff/SCCS)
#
#################
# set up a trap to clean up after ourselves if we are killed...
#
trap 'ln -s SCCS_DIRECTORIES/SCCS;make clobber;exit 100' 2 3 15

#
#	Are we building a specific release? If we are and the corresponding
#	SID list doesn't exist, we might as well quit right now.
#
if [ -f RELEASE ]; then
	SID_FILE=`cat RELEASE`.SID
	if [ ! -f SIDlist/$SID_FILE \
	    -a ! -f SCCS_DIRECTORIES/SIDlist/SCCS/s.$SID_FILE ]; then
		echo "Error: SID file $1 does not exist"
		exit 1
	fi
fi

#
# The only real problem child is /usr/src/SCCS->/usr/src/SCCS_DIRECTORIES/SCCS
# which we'll handle as a special case...
#

echo "Finding sub-directories in SCCS_DIRECTORIES...."
rm -f SCCS
find SCCS_DIRECTORIES -type d -print | sed -e '/lost+found/d' \
	-e '/^SCCS_DIRECTORIES$/d' -e '/^SCCS_DIRECTORIES\/SCCS/d' > major_list
#
# Make directories
#
echo " Making sub-directories in current directory...."
for i in `grep -v 'SCCS$' major_list| sed 's/^SCCS_DIRECTORIES\///'`
do
	if [ ! -d $i ]
	then
		mkdir $i
		if [ $? -ne 0 ]
		then
			echo "........mkdir failed on directory" $i
		fi
	fi
done
	

echo "Making relative path symbolic links to SCCS...."

for SCCS_DIR in `grep 'SCCS$' major_list`
do
	#
	#	Trim off SCCS_DIRECTORIES
	#
	symln=`echo $SCCS_DIR| sed 's/SCCS_DIRECTORIES.//'`
	#
	#	Calculate relative dot-dot....
	#
	dotdot=`echo $symln |sed -e 's/.SCCS//' -e 's/\// /g' -e 's/$/ /' \
	    -e 's/[^ ]* /..\//g'`
	#
	#	put together full symlink name
	#
	realdir=${dotdot}${SCCS_DIR}
	#
	#	command is ln -s relpath symln
	#
	ln -s $realdir $symln
	if [ $? -ne 0 ]
	then
		echo "........symlink failed on command: ln -s " $realdir $symln
	fi
done
ln -s SCCS_DIRECTORIES/SCCS
if [ $? -ne 0 ]
then
	echo "........symlink failed on command: ln -s SCCS_DIRECTORIES/SCCS"
fi
rm -f major_list

#
#	Are we building a specific release? If not, we're done.
#
if [ ! -f RELEASE ]; then
	echo "Done...."
	exit 0
fi
#
#	Make sure the SID_FILE is checked out. (We already know it exists.)
#
if [ ! -f SIDlist/$SID_FILE ]; then
	/usr/sccs/get -GSIDlist/$SID_FILE SIDlist/SCCS/s.$SID_FILE
fi

#
#	Now descend through the tree and check out the files specified
#	in the SID list.
#
echo "Checking out files for release `basename $SID_FILE .SID`..."
egrep -v '^#' SIDlist/$SID_FILE \
	| awk '{ print $1" "$1" "$2 }' | sed 's/SCCS\/s\.//' \
	| awk '{ printf "/usr/sccs/get -s -r%s -G%s %s;", $3, $1, $2 }' \
	| tee errs.populate | sh -s
echo "Done...."
rm errs.populate
exit 0