Write a cmd line script to parse an xml file

What would be the best solution to check (from the command line with a script), if a certain xml file contains this line:

<endpoint uri="endpoint.php" class="flex.messaging.endpoints.AMFEndpoint"/>

or this line

<!-- <endpoint uri="endpoint.php" class="flex.messaging.endpoints.AMFEndpoint"/> -->

and stop execution if the second one (commented out) is found?

Thx, martin

From stackoverflow

• Single line or across multiple lines? If the former, you can use grep.

  Update: There seem to be some XML aware variants like xgrep, xmltwig and xmlstarlet.

  Maxim Veksler : +1 for xmlstarlet

• assuming pattern occurs at single line

  #!/bin/bash
  awk '
  /<endpoint uri=.*endpoint.php.*class.*flex.messaging.endpoints.AMFEndpoint/ && /<!--/{
      exit
  }
  /<endpoint uri=.*endpoint.php.*class.*flex.messaging.endpoints.AMFEndpoint/{
      # to execute external script inside awk, uncomment below
      #cmd = "myscript.sh"
      #system(cmd)
  } 
  ' file
  

  OR you can return a code back to shell

  #!/bin/bash
  var=$(awk '
  /<endpoint uri=.*endpoint.php.*class.*flex.messaging.endpoints.AMFEndpoint/ && /<!--/{
      print 1
  }
  /<endpoint uri=.*endpoint.php.*class.*flex.messaging.endpoints.AMFEndpoint/{
      print 0
  } 
  ' file)
  [ "$var" -eq 1 ] && exit
  [ "$var" -eq 0 ] && ./myscript.sh
  

  Noufal Ibrahim : These are not totally reliable. A node called

  ghostdog74 : its OP's sample, not mine. If there is possibility of "s" in endpoint, then matching it exactly will do.

  martin : this looks good! It is sufficient how it is checked. I am trying to execute a script in the second case... just putting a command in there does not work for me e.g. (./doSomething.sh) do I need to use exec()?