Re: Unexpected replacement

On Wed, 14 Dec 2005 21:59:11 +0800, gregh_oh wrote:

> Good day sedders,
>
> I am trying to write a simple batch file to do some replacements
> within an XML file using GNU sed version 4.0.7 on Windows XP.
>
> Here is the line (#62)I'm targeting:
>
> <menutree:TREENODE TEXT="Updates" EXPANDED="true"
> TREENODESRC="xmlfiles/Menu.xml" IMAGEURL="images/folder.gif"
> EXPANDEDIMAGEURL="images/folderopen.gif" FILENAME=""/>
>

Judging from the result you give, the last 3 lines were actually
one wrapped long line.

> Here is the snipit from the batch file that invokes sed:
>
> SET /P Choice=Enter tree node text and press Enter:
> sed 62s/TREENODE\x20TEXT.*EXPAND/TREENODE\x20TEXT\x3D\x22"%
> Choice%"\x22\x20EXPAND/  <..\Incrementals.html > tmp.txt
>

3 hints:
1st. '.*' pattern is greedy which means it will match a string as long as
possible.
2nd. Enclose your sed script with " on Windows, especially when there
is environment varviable in it.
3rd. Sed can either read input from stdin or files, so '<' in your script
can be omitted.
4th. There are metacharacters. Use them.

> My expectation is that user input text from the variable %Choice%
> replaces "Updates". However, given an input of: New Node Name, here
> is what ends up in tmp.txt:
>
> <menutree:TREENODE TEXT="New Node Name"
EXPANDEDIMAGEURL="images/folderopen.gif" FILENAME=""/>
>
> Why is sed not stopping at the first occurence of EXPAND?
> I'm sure that the answer is simple, but I just can't see it.
>

solution1. Change the portion of your script from:
TEXT.*EXPAND
to:
TEXT=[^=]*EXPAND


solution2. Use more metacharacters.
sed -r "62s/(TREENODE TEXT=.)[^\x22]*/\1%Choice%/" ..\Incrementals.html


-- 
Regards,
hq00e



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