bash - Reverse order of html with awk via line swapping -


basically every week have reverse following snippet

<!-- homepage slider begin --> <div class="container-fluid">   <div class="single-item-home hidden-xs">     <div class="slide slide--has-caption">       <a href="/1">         <img src="/sliders/1_example.jpg">       </a>     </div>      <div class="slide slide--has-caption">       <a href="/2">         <img src="/sliders/2_example.jpg">       </a>     </div>      <div class="slide slide--has-caption">       <a href="/3">         <img src="/sliders/3_example.jpg">       </a>     </div>      <div class="slide slide--has-caption">       <a href="/4">         <img src="/sliders/4_example.jpg">       </a>     </div>   </div> </div> <!-- homepage slider end -->

basically i'm wanting make awk script , have cron job take lines 4-8 swap lines 22-26 , lines 10-14 swap lines 16-20 can seem find way swap 1 line , not line blocks.

is possible awk or silly?

you may use awk . below script

 awk 'nr==fnr{line[i++]=$0}       end{          for(j=0;j<i;j++){          if(j>=3 && j<=7){              print line[j+18];              continue;          }          else if(j>=21 && j<=25){              print line[j-18];              continue;          }          else if(j>=9 && j<=13){              print line[j+6];              continue;          }          else if(j>=15 && j<=19){              print line[j-6];              continue;          }          print line[j];          }      }' file

will want.

sample output

<!-- homepage slider begin --> <div class="container-fluid">   <div class="single-item-home hidden-xs">     <div class="slide slide--has-caption">       <a href="/4">         <img src="/sliders/4_example.jpg">       </a>     </div>      <div class="slide slide--has-caption">       <a href="/3">         <img src="/sliders/3_example.jpg">       </a>     </div>      <div class="slide slide--has-caption">       <a href="/2">         <img src="/sliders/2_example.jpg">       </a>     </div>      <div class="slide slide--has-caption">       <a href="/1">         <img src="/sliders/1_example.jpg">       </a>     </div>   </div> </div> <!-- homepage slider end -->

note: leave array-bounds check you. if content of file static, may not need this


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