Sed script for find/replace inside .jsp files. (from Struts to JSTL EL syntax)

Question

I want a sed script that I can use for 1) finding instances, and 2) printing this string:

<bean:write name='iframesrcUrl'/> 
<bean:write name="iframesrcUrl"/>
<bean:write name="currentPage" property="title" filter="false"/>

or similar. name and property values can differ. property and filter attributes are optional. Both single quotes ' and double quotes " occur.

The sed command must be two headed: I want first to run one command to see what it finds. Then I want to run the next command to make the actual replacements. The strings should be replaced with:

${ iframesrcUrl }
${ currentPage.title }

A quick grep shows there are 68 occurences in my project: grep '<bean:write name=' **/* |wc -l

What would be the easiest way to solve this?

Answer 1

I'm going off of your grep regex here

1) Print what it finds

sed '/<bean:write name=/!d'

2) Replace what it finds

sed '/<bean:write name=/s/^.*$/${ iframesrcUrl }\n${ currentPage.title }/'

Looking further at your question, I see you appear to have Bash4 with globstar on (due to the **/* glob). If you want these sed scripts to run on each file recursively I would suggest:

#!/bin/bash

for file in **/*; do
    <sed one-liner here> "$file"
done

For the replacement sed script, just add -i to do an in-place edit. Note that this requires GNU sed to work. If you don't have GNU sed, you will have to redirect the output to a temp file.

Answer 2

its not exactly clear what your output might be. just a guess until you provide more clear sample inputs and output

awk '/bean:write name/{
    $0="${ iframesrcUrl }\n${ currentPage.title }"
}{print}' file

Answer 3

Having learned from the other answers that partially covered my question, i ended up with the following.

(I bet it can be made shorter but it works)my try to find every occurence of constructions like

#my try to find every occurence of constructions like 
# <bean:write name='iframesrcUrl'/> 
# <bean:write name="iframesrcUrl"/>
# <bean:write name="currentPage" property="title" filter="false"/>
# 
# or similar. name and property values can differ. property and filter attributes are optional. 
# Both single quotes ' and double quotes " occur.
#
# cd jahia_virk/tomcat/webapps/ROOT/jsp/jahia/templates/virk/virk.dk


# Printing occurences:
# =====================
sed -nE \
-e '/<bean:write name="([[:alpha:]]+)"( property="([[:alpha:]]+)")( filter="false")?\/>/p' \
-e "/<bean:write name='([[:alpha:]]+)'( property='([[:alpha:]]+)')( filter='false')?\/>/p" \
-e '/<bean:write name="([[:alpha:]]+)"\/>/p' \
-e "/<bean:write name='([[:alpha:]]+)'\/>/p" \
*.jsp **/*.jsp **/*.inc  


# Replacing occurences:
# =====================
sed -E -i .bak \
-e 's/<bean:write name="([[:alpha:]]+)"( property="([[:alpha:]]+)")( filter="false")?\/>/${ \1.\3 }/g' \
-e "s/<bean:write name='([[:alpha:]]+)'( property='([[:alpha:]]+)')( filter='false')?\/>/\${ \1.\3 }/g" \
-e 's/<bean:write name="([[:alpha:]]+)"\/>/${ \1 }/g' \
-e "s/<bean:write name='([[:alpha:]]+)'\/>/\${ \1 }/g" \
*.jsp **/*.jsp **/*.inc

A few lessons learned:

• $ is reserved from the command line, so I had to escape the $ sign in lines where the sed expression is within double-quotes
• \w did not work for matching any word character. So I had to substitute with [[:alpha:]]
• Substitutions in any file in any directory (*/* **/*) is a no-go for hidden system files, binary files like images, etc. I had to focus on only .jsp and .inc files for my project: *.jsp **/*.jsp **/*.inc

One more word of caution: I did this on a project to move it away from old-school struts style. If you are in a similar situation be careful to review any edits manually afterwards.

Script shortcomings: For various reasons, the following examples were not found with the script above:

<bean:write name='scriptEditor-Url'/>    
<bean:write name='currentSite' property='homePage.url'/>
<bean:write name="portlet" property="value" filter="false" />
<bean:write name='<%= "optTextUrl" + id %>'/>

#1 failed because [[:alpha:]] did not match - (and there are also some with underscores).

#2 is the same: [[:alpha:]] does not match a dot ..

#4 concatenates strings inside parameter name. I could write a script to find them , but there are only four occurences in the project. The big question is what it should be replaced with. I suspect inline java does not work. and I suspect I cannot just write ${ 'optTextUrl' + id }

Answer 4

Assuming that you have a file like

<root>
<bean:write name='iframesrcUrl'/> 
<bean:write name="iframesrcUrl"/>
<bean:write name="currentPage" property="title" filter="false"/>
<foo><bar/></foo>
</root>

you can do replacements with this sed command (using GNU sed):

 sed "s/<bean:write name=[\'\"]\?iframesrcUrl[\'\"]\?\/>/\${ iframesrcUrl }/g; \
      s/<bean:write name=[\'\"]\?currentPage[\'\"]\?.*\/>/\${ currentPage.title }/g;" \
     input.xml

which produces:

<root>
${ iframesrcUrl } 
${ iframesrcUrl }
${ currentPage.title }
<foo><bar/></foo>
</root>

Is it what you need? Or do you want to replace attributes' values? Or do you want to put your substitution text into these tags?

To find and edit all files in-place (attention! changes your files, please test without -i before use, put your file mask instead of '*.jsp'):

find . -type f -name '*.jsp' -print0 | xargs -0 sed -i "..."

UPDATE

To replace attribute values, not the lines of file themselves, I would strongly recommend using xmlstarlet instead of sed/awk. It is much more reliable and flexible. I cannot post solution exactly for your case, because xmlstarlet needs a complete (valid) file to process, but this is an idea:

Given a file:

<a>
   <b>
      <c name="foo"/>
      <c name="bar"/>
   </b>
</a>

Let say we want replace foo with SPAM and bar with EGGS. Then this command will do it (splitted lines for readability):

$ printf '<a><b><c name="foo"/><c name="bar"/></b></a>' | \
  xmlstarlet ed --update "//c[@name='foo']/@name" -v SPAM \
                --update "//c[@name='bar']/@name" -v EGGS
<?xml version="1.0"?>
<a>
  <b>
    <c name="SPAM"/>
    <c name="EGGS"/>
  </b>
</a>

I used XPath syntax to select an element to replace (in the first case it is name attribute which belongs to any c tag and is equal to foo). ed subcommand of xmlstarlet allows various transformations, replacing (updating) an element is just on of them.

In real-life examples you will need to specify also bean workspace, i.e. add something like

 -N bean=urn:...

to the list of xmlstarlet's options. You can find the correct URI in the first lines of your .jsp file (I don't have any to look at).