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I have a file values.properties which contain data, like:

$ABC=10 $XYZ=20

I want to create a shell script that will take each element one by one from above file.

Say $ABC, then go to file ABC.txt & replace the value of $ABC with 10. Similarly, then go to file XYZ.txt and replace $XYZ with 20.

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1 Answer 1

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I think maybe this should be in the Unix and Linux section, the solution I've hacked together is as follows:

cat values.properties | grep "=" | cut -d "$" -f2 | awk -F "=" '{print "s/$"$1"/"$2"/g "$1".txt"}' | xargs -n2 sed -i

The flow is like so:

  1. Filter out all the value assignments via: grep "="
  2. Remove the '$' via: cut -d "$" -f2
  3. Use awk to split the variable name and value and construct sed replacement command
  4. Use xargs to pull in the replacement parameter and target file via: xargs -n2
  5. Finally pass sed to as the command to xargs: xargs -n2 sed
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Upvoted, good hack. This will work for variables with naming convention $ABCD in the destination file, but will not work for ${ABCD}. Kindly update the command to cover both scenario.

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