#!/bin/bash

##==============================================================================
##
## rsub
##
## Usage: rsub
##
## This utility applies the SED script /tmp/sub.sed to files of these types:
##
##     *.h *.cpp *.c
##
## It recurses down from the current directory looking for matching files.
## The original files are moved to a directory called ".rsub" under each of
## the directories visited. The changes are then written.
##
##==============================================================================

SUB_SED=/tmp/sub.sed

# Check usage:

if [ "$#" != "0" ]
then
    echo "Usage: $0"
    echo
    exit 1
fi

# Be sure $SUB_SED exits.

if [ ! -f $SUB_SED ]
then
    echo "$0: $SUB_SED not found"
    exit 1
fi

# Build list of directories (exclude 'CVS' and '.rsub' directories)

DIRS=`find . -type d | grep -v CVS | grep -v ".rsub"`
SAVE_PWD=$PWD

# Perform substitution on each file.

for dir in $DIRS
do
    echo "Entering directory: $dir"

    cd $dir
    mkdir -p .rsub

    FILES=`ls -1 *.h *.cpp *.c 2> /dev/null`

    for file in $FILES
    do
	echo "File: $file"

	if [ -f $file ]
	then
	    mv $file .rsub/$file
	    sed -f /tmp/sub.sed .rsub/$file > $file
	else
	    echo "$0: warning: $file not found"
	fi
    done

    echo "Leaving directory: $dir"

    cd $SAVE_PWD
done