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

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 }