Did you know you can do in-place batch processing with plain ruby?
The following script will in-place replace "foo" with "bar" in all files you feed it. Call it with ./my_script path/to/my/files/*
#!ruby -i -p
$_.gsub!(/foo/, "bar")
"'-i -p" means:
Ruby will run your script once for each line in each file. The line will be placed in $_. The value of $_ at the end of your script will be written back to the file.
Shorter
Using the Kernel#gsub shorthand for $_.gsub!:
#!ruby -i -p
gsub(/foo/, "bar")
Still shorter
Pass the whole script on the command line
ruby -i -p -e 'gsub(/foo/, "bar")' path/to/my/files/*
Posted by Tobias Kraze to makandra dev (2013-07-05 13:37)