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#!/bin/sh
# usage: GlobalReplace.sh [-n] searchRegex replaceString filelist...
# $Id$
# NOTE: it's a good idea to run this without any files to process to
# check that the quoting in the sed script is ok.
# WARNING: at least on the Mac, and judging by the diff output using -n,
# this also adds a newline at the end of every source file which lacks one.
# This is ok on the files that it needs to modify anyway,
# but not on the files it otherwise doesn't need to.
# To work around this problem, only run it on the necessary files,
# which can be found using a command like
#
# % fgrep -l <string> `tools/AllPyFiles.sh` # to find only source files
#
# or
#
# % find . -name '*.py' -print | xargs fgrep -l <string> # to find outtakes files, etc
# Example:
#
# tools/GlobalReplace.sh "old\.symbol" "new.symbol" `tools/AllPyFiles.sh`
dryRun=false
if [ "x$1" = "x-n" ]; then
dryRun=true
shift
fi
searchRegex=`echo "$1" | sed 's:/:\\\\/:g'`
replaceString=`echo "$2" | sed 's:/:\\\\/:g'`
shift
shift
cat <<EOF > /tmp/sed$$
s/$searchRegex/$replaceString/g
EOF
cat /tmp/sed$$
for i in $*; do
sed -f /tmp/sed$$ < $i > $i.tmp$$
if cmp --silent $i $i.tmp$$; then
rm $i.tmp$$
else
diff -u $i $i.tmp$$
if $dryRun; then
rm $i.tmp$$
else
mv $i.tmp$$ $i
fi
fi
done
rm /tmp/sed$$
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