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  1. #!/bin/bash
  2. s='    some text
  3.     <addresses>
  4.       <something/>
  5.     </addresses>
  6.     some more text
  7.     <addresses xmlns="namespace">
  8.       <could be anything/>
  9.     </addresses>
  10.     some other text
  11.     <addresses>
  12.       <something else/>
  13.     </addresses>
  14.     ...'
  15. perl -0777 -pe 's~<(addresses)\s+xmlns="namespace">[^<]*(?:<(?!/\1>)[^<]*)*\K</\1>~</namespace:$1>~' <<< "$s"
Success #stdin #stdout 0.01s 5400KB
comments ()
stdin
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Standard input is empty
stdout
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    some text
    <addresses>
      <something/>
    </addresses>
    some more text
    <addresses xmlns="namespace">
      <could be anything/>
    </namespace:addresses>
    some other text
    <addresses>
      <something else/>
    </addresses>
    ...
https://ideone.com/RNRzWK
language:
Bash (bash 5.0.3)
created:
2 years ago
visibility:
secret

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