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Run search/replace on all files

David O'Meara
Rancher

Joined: Mar 06, 2001
Posts: 13459

I need to remove leading and trailing whitespace from files in a directory and sub-directories (simple HTML reduction)

I have the following for a single file, how to run over all files and directories according to a file pattern?



If it helps, I'd also like to run:


I have about 10 more, but that's likely to be enough.
[ July 01, 2008: Message edited by: David O'Meara ]
Rodrigo Tomita
Ranch Hand

Joined: Apr 28, 2008
Posts: 70
Hi, David,

Using bash, you can use 'find' to get all the files recursively and do a 'for' loop on the result. I think you can try something like:



I usually test if I'm getting the correct the file set by doing a 'echo $i' inside the 'for' before putting other commands. And... consider having a backup first as well
[ July 01, 2008: Message edited by: Rodrigo Tomita ]
Tim Holloway
Saloon Keeper

Joined: Jun 25, 2001
Posts: 15964
    
  19

Hmmmm. You can get a list of candidate files with this:


for `find -type f -regex ".*/\s+.*$" -or -regex ".*\s$"`

However, if you've got directory names with leading spaces, it will give false positives, since my leading-space regex doesn't have the smarts to only look at the LAST slash in the path.

Still, it's a start. Usually I do this sort of stuff with a Perl script.


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Rodrigo Tomita
Ranch Hand

Joined: Apr 28, 2008
Posts: 70
Ahm... were you talking about removing spaces in the file names ?

In my post I thought you meant running your 'sed' command in several files editing the file content... Sorry about that.
David O'Meara
Rancher

Joined: Mar 06, 2001
Posts: 13459

Yes, these are production files
Thanks Tim, I could barely understand it, so it must be right

I'll be running a local test before verifying in our TEST environment, and backing up clients before running against them.
David O'Meara
Rancher

Joined: Mar 06, 2001
Posts: 13459

Word for the novice:
Since sed provides a line by line replacement, don't attempt to redirect back to the same file

Currently I am using
Carey Evans
Ranch Hand

Joined: May 27, 2008
Posts: 225

Some versions of sed provide a "-i" option to update files in place, optionally making backups, like Perl. For example, with GNU sed:



will change "foo" to "bar" and update the original files. "-i~" would keep backups with .txt~ extensions.

By the way, mv will replace the destination if it exists, so you don't have to delete it first.
 
It is sorta covered in the JavaRanch Style Guide.
 
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