Using variables in search pattern in awk script

Question

#!/usr/local/bin/gawk -f  `

{  
awkvar2="/id=22/";  
awkvar3="/end/";  


if ($0 ~ awkvar2) {  
    triggered=1;  
  }  
  if (triggered) {  
     print;  
     if ($0 ~ awkvar3) {  
        triggered=0;  
        print "\n-----------------------------------------------\n"  
     }  
  }  
}  

this awk script does not work for me, I try to search from one line to another ie id=22until end (the reason I do not use /<string>/,/<string>/it is because I want a large line after each search block) and I want this to use only variables. I could use templates directly if ($0 ~ /end/) { but I don’t want to do this, I want to use variables inside the search template (the reason is that I will get values ​​in variables that dynamically fill the shell)

please tell me how to use variables in awk search pattern

thank...

Answer 1

{
awkvar2="id=22";
awkvar3="end"; 
if ($0 ~ awkvar2) {
        triggered=1;
         }
if (triggered) {
         print;
         if ($0 ~ awkvar3) {
              triggered=0;
              print "\n-----------------------------------------------\n"
         }
}
} 

Edit

"id = 22"

{
  awkvar2="id=22";
  awkvar3="end"; 
  if ($0 ~ awkvar2) {
          print prev;
          triggered=1;
  }
  if (triggered) {
          print;
          if ($0 ~ awkvar3) {
              triggered=0;
              print "\n-----------------------------------------------\n"
          }
  }
  {prev=$0;}
}  

, awkish

BEGIN {awkvar2="id=22";awkvar3="end"}

($0 ~ awkvar2),($0 ~ awkvar3) { if ($0 ~ awkvar2) {print prev;}
                                print; 
                                if ($0 ~ awkvar3) {
                                    print "\n---------------\n"
                                }
                               }
{prev=$0;}

Answer 2

belisarius awk script, 'if's

BEGIN {awkvar2="id=22";awkvar3="end"}

($0 ~ awkvar2) {print prev;}
($0 ~ awkvar2),($0 ~ awkvar3) {print; }
($0 ~ awkvar3) {print "\n---------------\n"}
               {prev=$0;}