[Ltib] Fix + Optimization when checking for updated source

[Jehan Bing]

Hi


Our ltib setup is currently this:
    package1/
    package2/
    ltib/
        rpm/
            BUILD/
                package1 -> ../../../package1
                package2 -> ../../../package2

because rpm/BUILD/packageX is a symbolic link, "find" returns 
immediately when checking if the source was changed and doesn't actually 
check the source. One option is to add a / at the end of the directory 
name ("find $src_dir/ ..."). But there could also be symlinks inside the 
directory pointing outside tree so I think use "-L" to follow _all_ 
symlinks is a better idea (though it can slow down the check quite a bit 
if the symlink points to a big directory)

Also, find will search for _all_ the files that are newer than the rpm 
but knowing that one file at least changed is enough and checking the 
rest is just useless processing. So find should use the "-quit" 
parameter to stop the search as soon as one file is found.

Patch attached.

Cheers,
    Jehan


diff --git a/ltib b/ltib
index 10134a7..9f66282 100755
--- a/ltib
+++ b/ltib
@@ -904,7 +904,7 @@ TXT
                         die("'$src_dir' doesn't exist\n") unless -e 
$src_dir;
                     }
                     # See if the source tree has been touched
-                    $cmd = "find $src_dir -newer $rpms[0] -print";
+                    $cmd = "find -L $src_dir -newer $rpms[0] -print -quit";
                     print "checking if sources have been updated: ";
                     if(`$cmd`) {
                         print "yes\n";