CODEWITHSUNDEEP
linuxshellscriptingawk
Codrguy
Codrguy

Reputation: 669

resetting a flag in awk

I have the following function which uses awk:

getStageMode() {
targ=$1; shift
       mode=$(awk '
        /[<]app-deployment/{a=1}
        a && /[<]name[>]'"${targ}[<]"'/{n=1}
        a && n && /[<]staging-mode[>]/{ 
          sub(/[<]staging-mode[>]/,"", $0)
          sub(/[<]\/staging-mode[>]/,"",$0)
          print $0
          exit
        }
        {print "n=" n }
        ' "${@}")
echo $mode
}

I am having trouble resting the n flag after it's set to 1. where is the proper place to reset it?

Upvotes: 1

Views: 189

Answers (1)

ninjalj
ninjalj

Reputation: 43718

/[<]\/app-deployment/{a=0; n=0}

So, you would have:

getStageMode() {
targ=$1; shift
   mode=$(awk '
    /[<]\/app-deployment/{a=0; n=0}
    /[<]app-deployment/{a=1}
    a && /[<]name[>]'"${targ}[<]"'/{n=1}
    a && n && /[<]staging-mode[>]/{ 
      sub(/[<]staging-mode[>]/,"", $0)
      sub(/[<]\/staging-mode[>]/,"",$0)
      print $0
      exit
    }
    {print "n=" n }
    ' "${@}")
echo $mode
}

Explanation: OP has a generated file with XML nodes like:

<app-deployment>
    <name>gr2</name>
    <target>AdminServer</target>
    <module-type>ear</module-type>
    <source-path>/u01/app/wls1035_homes/wls1035_9999/grc864</source-path>
    <security-dd-model>DDOnly</security-dd-model>
    <staging-mode>nostage</staging-mode>
</app-deployment>  
<app-deployment>
    <name>gr3</name>
    <target>AdminServer</target>
    <module-type>ear</module-type>
    <source-path>/u01/app/wls1035_homes/wls1035_9999/grc864</source-path>
    <security-dd-model>DDOnly</security-dd-model>
</app-deployment>

The AWK script sets a when we are inside an app-deployment XML node, and n when that node has the name we are looking for. Since some nodes have no staging-mode, the original AWK, which didn't reset neither a nor n, could return the staging-mode for the following node. Resetting those variables when exiting a node should fix that issue.

Upvotes: 2

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