[ILUG] Find & replace script (?)

[Lars Hecking]

> THE PROBLEM
> The problem is that I am currently in the process of switching web servers.
> (Going with apache) Now the problem is that all the web pages have server
> specific tags in the html. These do not work under apache and I don't want
> them to either. Now what I want to do is one of the following:
> 1. I could leave the specifc tags alone and just write in my own (in this
> case I am call a ssi <!--#exec cmd="/path/to/command"--> that would be fine
> except I need to delete one line from all the files and add the above ssi
> tag. How do i do this with with a web site that has about 10,000 to 35,000
> documents.

 If the tag is the same in all documents:

$ for i in `find /foo/bar -name '*.html' -print` ; do mv ${i} ${i}.bak ; \
  sed 's,tag,replacement,g' ${i}.bak >${i} ; rm -f ${i}.bak ; done

 If not all documents need to be processed, one could wrap an

 if grep 'tag' ${i} >/dev/null 2>&1 ... fi

 around the mv ... sed ... rm ... sequence.

 If the tag contains a number of different special characters, it may be
 necessary to do the processing in more than one step, or even use
 temporary placeholders

 ... sed -s 's,xxx,yyy,g' -e 's,zzz,ttt,g' -e "s,yyy,uuu,g'

 If the tag is different in different files, it gets more complicated,
 and others might suggest perl ...

 You can email me directly if you need more help.