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I have been bashing my head against the wall trying to get sed to search a file are replace a timestamp.

example replace strings (file):

<script src="<@ofbizContentUrl>/xxx/js/v6/jsfile.js?v=201711271300</@ofbizContentUrl>"></script>

<script src="<@ofbizContentUrl>/xxx/js/v6/jsfile2.js?v=20171127245</@ofbizContentUrl>"></script>

basically I want to replace the 201711271300 in the examples with the current timestamp which i have saved in a variable date. The dates in the example differ from case to case.

I've been trying

sudo sed -i "s/?v=.+?(?=<)/?v=${date}/g" file

to no avail, going on 2 hours now

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  • You can do this with less headache with python in couple of lines. Do you have to use ancient sed? Commented Nov 28, 2017 at 19:30
  • 2
    sed doesn't support lookahead regex Commented Nov 28, 2017 at 19:31
  • i guess i dont basically we have a shell script that deploys our nee builds of our website so i was trying to do it on the fly during the build process but i guess i can just add a python command in the sh script that will handle the replacement Commented Nov 28, 2017 at 19:32
  • @anubhava uhg thanks Commented Nov 28, 2017 at 19:32

1 Answer 1

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2

Try this one

sed "s/?v=\([0-9]*<\)/?v=${date}</g" $file

It uses a simpler pattern: all digits until you hit a <. Replace by a data (and restore the <).

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