[plug] grep task?

[Cameron Patrick]

On Sat, Nov 22, 2003 at 02:16:43PM +0800, Cameron Patrick wrote:
| On Sat, Nov 22, 2003 at 02:02:57PM +0800, John Knight wrote:
| 
| | Are there any greppers who could could tell me how to get a certain task 
| | out of the way? I've got to go through several directories of html pages 
| | and change an email address in them.
| | 
| | I'd be wanting the script to:
| | 1. search through the files for "anarchist_tomato at hotmail.com"
| | 2. if found, replace with "entombednerds at yahoo.co.uk"
| | 3. report the name of the file that's just been changed.
| | 
| | Is that possible?
| 
| Not using grep, but sed will do it:

Oh, some more hackery will be required for part 3. Perhaps something
like:

for file in *.html; do
	sed 's/anarchist at blah/entombednerds at blah/g' <${file} >${file}.new || exit 1
	if cmp -s ${file} ${file}.new; then
		# file hasn't changed
		rm ${file}.new
	else
		# file has changed
		echo "changing ${file}"
		mv ${file} ${file}.old
		mv ${file}.new ${file}
	fi
done

Bash scripting is handy for this kind of thing :-)  The above is
completely untested, BTW.

Cameron.

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