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Passing a value to a condition

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# 1  
Old 10-20-2011
Passing a value to a condition
All

Hopefully the title is not too misleading but I'm hitting a stumbling block. I have a file that looks like this.

Code:
<create_context date="2010-12-31" id="IMAP-20101231-20111020201249" name="IMAP-20101231" timestamp="2010-12-31">
      <instrument>
         <file>/tmp/instruments.txt</file>
      </instrument>
      <mtf>
         <cube id="045_FULLMC">
            <manifest>11.csr</manifest>


I loop through this file reach the cube id line where I strip out the 045 integer value and the idea is to then create a new line as follows

Code:
<directory>/tmp/045</directory>



I also process the cube id line. So in the end, my file should look like this.

Code:
<create_context date="2010-12-31" id="IMAP-20101231-20111020201249" name="IMAP-20101231" timestamp="2010-12-31">
      <instrument>
         <file>/tmp/instruments.txt</file>
      </instrument>
      <portfolio>
         <directory>/tmp/045</directory>
      </portfolio>
      <mtf>
          <cube id="FULLMC">
            <manifest>11.csr</manifest>



The code works fine for 99% of what I need to do. Where I am struggling is in passing the correct cube id. So instead of /tmp/045 I see my original declaration of $cubeid which is 000. Because it's doing a while loop, $cubeid will always be 000 for the first 10 or so lines before it reaches the cube id line but by then it seems too late.

Code:
my $cubeid='000';
my $portexists=0;

push @OUT, "<contexts>\n";

while(<>){
        $cubeid=$1 if s/cube id="(\d+)_(\w+)">/cube id="$2">/;
        $portexists = 1 if m/<portfolio>/;
        if (m#<mtf># and $portexists == 0 ){
        push @OUT, "\t<portfolio>\n";
        push @OUT, "\t\t<directory>$dynPath/$portFile/$cubeid</directory>\n";
        push @OUT, "\t</portfolio>\n";
        }
}
push @OUT, "</contexts>\n";

open(WF,">${cubeid}_create_context.xml");
print WF @OUT;

It seems rather trivial but I have been at this for a while but no joy. any help appreciated as always.
Last edited by vgersh99; 10-20-2011 at 06:41 PM.. Reason: code tags, please!
# 2  
Old 10-20-2011
You'll need to parse the file twice to get the right cube id when you encounter "<mtf>" - otherwise you're already late...
Something along these lines in awk - not as succinct as perl, but.....
nawk -f king.awk myFile
king.awk:
Code:
BEGIN{ ARGV[ARGC++] = ARGV[1] }
FNR==NR {if(/cube id=/ && match($0,"[0-9]+_")) {cubeA[++c]=substr($0, RSTART, RLENGTH-1);rs[c]=RSTART;rl[c]=RLENGTH}; next}
/mtf/ {
   printf("\t<portfolio>\n\t\t<directory>/tmp/%s<directory>\n\t</portfolio>\n", cubeA[++c2])
}
/cube id=/ {$0=substr($0,1,rs[c2]-1) substr($0, rs[c2]+rl[c2])}
1

Last edited by vgersh99; 10-20-2011 at 07:29 PM..
# 3  
Old 10-20-2011
Thank vgersh99.. can't say I understand what the awk script does but I'll give it a try. Thanks for your help
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