HOWTO Find and Restore a Deleted SVN File/Folder

1. Change directories to your SVN project.
2. Run svn log -v > all_history.txt
3. Open all_history.txt and find the file you want (Ctrl + F is your friend!)
4. Make sure the line of the file you want begins with a D, this means it was deleted.
5. Look up above that file for the revision number, subtract one from it.
6. Run a new checkout for the version right beforehand i.e.: svn co http://hostname/path/to/files_parent_directory@revision#_right_before

Example

We want to find DataFeedList.java, here is the svn log:

------------------------------------------------------------------------
r24843 | joslewis | 2013-04-14 10:24:28 -0600 (Sun, 14 Apr 2013) | 1 line
Changed paths:
   D /trunk/software/src/bmod/gui/widgets/DataFeedList.java
   D /trunk/software/src/bmod/gui/widgets/FilterableComponentList.java
   D /trunk/software/src/bmod/gui/widgets/JValidatingTextField.java
   D /trunk/software/src/bmod/gui/widgets/WebButton.java
   D /trunk/software/src/bmod/gui/widgets/WebMenuItem.java
   M /trunk/software/src/bmod/plugin/generic/gui/ReportBugMenuItem.java

Modified ReportBugMenuItem to now work without WebButton. -~400 lines.
------------------------------------------------------------------------

We can see it was deleted (D) during revision r24843 by me on 2013-04-14 10:24:28 -0600. That means we want to actually get the version right before it was deleted, so we'll check out version 24842.

It was in the folder: /trunk/software/src/bmod/gui/widgets/, so we'll craft a new checkout with the information to get it back:

svn co http://svn.host.com/trunk/software/src/bmod/gui/widgets@24842

Run this in another folder so you don't overwrite the existing source, and you'll find the deleted item in it!