[Bug 15359] cmd's "for" command doesn't handle /F. Breaks msysgit, firefox build.

http://bugs.winehq.org/show_bug.cgi?id=15359

--- Comment #14 from Dan Kegel   2009-12-23 20:54:20 ---
It seems the command in #11 is an idiom for getting a fully qualified path
to the directory containing the current batch file:

for /F "delims=" %%I in ("%~dp0..") do set dir=%%~fI

delims= avoids breaking the path at a space
%~dp0.. = drive letter and path of the script followed by .. to get containing
dir
%%~fI = fully qualified name for %%I (this strips off the trailing ..)

leaves dir set to a nice absolute path to the batch file, useful for finding
neighboring scripts or data files.