Script to put block comment after finding regex in xml file


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# 1  
Script to put block comment after finding regex in xml file

hi,
i need my bash script to find regex in xml file.. and comment 2 lines before and after the line that contains regex.. can't use # needs to be <!-- at the beginning and --> and the end of the comment.

so eg..
Code:
first block

<filter>
        <filter-name>MyRegEx</filter-name>
        <filter-class>MyRegExblablabla</filter-class>
    </filter>

second block

<filter-mapping>
        <filter-name>MyRegEx</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

so output should be
Code:
first block
<!--
 <filter>
        <filter-name>MyRegEx</filter-name>
        <filter-class>MyRegExblablabla</filter-class>
    </filter>

-->
 
second block
 
 
<!-- 
<filter-mapping>
        <filter-name>MyRegEx</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

 -->

unfortunately since it's an xml file.. # is not funtioning..
obviously there is no problem to find regex.. .. i can also find the lines of regex.. the difficulty is to wrap around 2 lines before and after.. with <!-- and -->
Does anyone know how to do it? i have been working on it for quite some time now..

Thank you

Last edited by Scott; 01-11-2011 at 04:26 PM.. Reason: Please use code tags
# 2  
You want to comments out lines, try sed, using N to get the entire element in /<\([^ >]*\).*<\/\1>/, and then wrap it in comment markup s/.*/<!-- & -->/ or similar.
# 3  
Quote:
Originally Posted by DGPickett
You want to comments out lines, try sed, using N to get the entire element in /<\([^ >]*\).*<\/\1>/, and then wrap it in comment markup s/.*/<!-- & -->/ or similar.

what do you mean by ?

"using N to get the entire element in /<\([^ >]*\).*<\/\1>/, "
# 4  
Code:
awk '/<filter>/||/<filter-mapping>/ {print "<!--\n" $0;next} 
     /<\/filter>/||/<\/filter-mapping>/ {print $0 "\n-->";next}1 ' infile

# 5  
Quote:
Originally Posted by rdcwayx
Code:
awk '/<filter>/||/<filter-mapping>/ {print "<!--\n" $0;next} 
     /<\/filter>/||/<\/filter-mapping>/ {print $0 "\n-->";next}1 ' infile


thanks .. but i have lots of sections that look like this.. i only need to comment section that has MyRegEx
Code:
    <filter>
        <filter-name>something</filter-name>
        <filter-class>something</filter-class>
        <init-param>
            <param-name>filterKey</param-name>
            <param-value>remote</param-value>
        </init-param>
    </filter>
     
   
    <filter>
        <filter-name>MyRegEx</filter-name>
        <filter-class>MyRegExblabla</filter-class>
    </filter>


    <filter>
        <filter-name>something</filter-name>
        <filter-class>somethingelse</filter-class>
        <init-param>

            <param-name>filterKey</param-name>
            <param-value>something</param-value>
        </init-param>
    </filter>

        <filter-mapping>
            <filter-name>something</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>

    <filter-mapping>
        <filter-name>something</filter-name>
        <url-pattern>/servlet/something</url-pattern>
        <url-pattern>/servlet/something</url-pattern>
        <url-pattern>/servlet/something</url-pattern>
        <url-pattern>/servlet/something</url-pattern>
        <url-pattern>/servlet/something</url-pattern>
    </filter-mapping>


    <filter-mapping>
        <filter-name>something</filter-name>
        <url-pattern>/remote/*</url-pattern>
    </filter-mapping>


    <filter-mapping>
        <filter-name>something</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>


    <filter-mapping>
        <filter-name>MyRegEx</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

Moderator's Comments:
Mod Comment Please use code tags

Last edited by Scott; 01-11-2011 at 04:27 PM.. Reason: Code tags, please...
# 6  
Using sed N to get an entire element. Let's say the element name is MsgBlk:
Code:
 
sed '
  /<MsgBlk[ >]/{
    :loop
    /<\/Msgblk>/!{
      $d
      N
      b loop
     }
    s/<MsgBlk[ >].*<\/MsgBlk>/<!--\
&\
-->/
   }
 '

Narrative:
Find the line with the opening element, and on it:
Set a branch target named loop.
If the element is not closed:
If at EOF, it is junk, delete it. Some sed are funny wih N at EOF.
Pile the next line at the end of the buffer.
Go back to check fo close of element.
Pick up just exactly this whole element, and where its ends were, put commenting markup and new lines around the while element.
# 7  
Quote:
Originally Posted by DGPickett
Using sed N to get an entire element. Let's say the element name is MsgBlk:
Code:
 
sed '
  /<MsgBlk[ >]/{
    :loop
    /<\/Msgblk>/!{
      $d
      N
      b loop
     }
    s/<MsgBlk[ >].*<\/MsgBlk>/<!--\
&\
-->/
   }
 '

Narrative:
Find the line with the opening element, and on it:
Set a branch target named loop.
If the element is not closed:
If at EOF, it is junk, delete it. Some sed are funny wih N at EOF.
Pile the next line at the end of the buffer.
Go back to check fo close of element.
Pick up just exactly this whole element, and where its ends were, put commenting markup and new lines around the while element.


i ran it like you have specified the output hasn't changed at all.. (substituted MsgBlk with my regex)
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