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Within Automator, how can I replace a particular string in many different files with the filename of each file?

// UPDATE

Using a "Run Shell Script" process I am able to get the body of a test file (an html file), with the string correctly replaced, but the modified file isn't being saved. I just see the file's contents as text in the "results" pane of "Run Shell Script". How do I:

a) Get the file name instead of the entire filepath? b) Save the modified file? Do I need another step when using sed?

enter image description here

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2 Answers 2

up vote 2 down vote accepted

You can use a Run Shell Script action, with a script like this:

basename=${1##*/}
tmp=`mktemp -t $$`
sed -e "s/STRING_TO_BE_REPLACED/$basename/g" "$1" > $tmp && mv $tmp "$1"

with Pass input: set to as arguments:

enter image description here

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In this instance, NEW_STRING should be $1 to accomplish your goal. –  jnovack Mar 27 '13 at 15:11
    
$1 is the passed name of the file that has to be filtered. –  Riccardo Marotti Mar 27 '13 at 15:47
    
Yes, but the goal was to replace the string with the filename. You were correct in showing the syntax, but to accomplish the goal, you would have to replace NEW_STRING with $1. I was augmenting, not critiquing. –  jnovack Mar 27 '13 at 16:58
    
Yes, you are right. I didn't read the question carefully enough :) I'll update the answer. –  Riccardo Marotti Mar 27 '13 at 17:04
    
Thanks, very educational! That regex gives me a headache but I'm going with it :) I want to set this up as a mini-app, that I can drag and drop text files onto, with them resaved with the change. The resaving isn't happening though. Am I missing an obvious step? –  Ben Mar 28 '13 at 16:58

This would work with multiple files and filenames with special characters:

for f in "$@"; do
    [[ ! -f $f ]] && continue
    text=$(cat "$f")
    printf %s "${text//stringToBeReplaced/${f##*/}}" > "$f"
done

Another option using Ruby:

ruby -i -pe '$_.gsub!("stringToBeReplaced", File.basename($FILENAME))' "$@"
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Thank you Lauri! –  Ben Apr 1 '13 at 19:55

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