Support specifying a builddir that deviates from the module-name/dest-dir.

I'm doing this to support building multiple branches with git repositories
from the same clone. With this change its possible to have this in the config:

module kdevplatform
branch master
prefix /home/andreas/kdevelop
repository git@gitorious.org:kdevelop/kdevplatform.git
end module

module kdevplatform-stable
branch 1.0
manual-build true
dest-build-dir kdevplatform-stable
dest-dir kdevplatform
prefix /home/andreas/kdevelop-stable
repository git@gitorious.org:kdevelop/kdevplatform.git
end module

To build the stable and development branches of kdevplatform easily with
kdesvn-build and without build-files interfering with one another.

CCMAIL: mpyne@kde.org


svn path=/trunk/KDE/kdesdk/scripts/kdesvn-build; revision=1126303

kdesvn-build

@@ -669,6 +669,30 @@ sub get_subdir_path
     return $dir;
 }
 
+
+# Subroutine to return the name of the destination directory for the 
+# build routines.  Based on the dest-build-dir option.  The return value will be
+# relative to the build dir.  The user may use the '$MODULE' or '${MODULE}'
+# sequences, which will be replaced by the name of the module in question.
+#
+# The first parameter should be the module name.
+sub get_dest_build_dir
+{
+    my $module = shift;
+    my $dest_dir = get_option($module, 'dest-build-dir');
+
+    if ($dest_dir eq '')
+    {
+        return get_dest_dir($module);
+    }
+    else
+    {
+        $dest_dir =~ s/(\${MODULE})|(\$MODULE\b)/$module/g;
+
+        return $dest_dir;
+    }
+}
+
 # Subroutine to return the name of the destination directory for the checkout
 # and build routines.  Based on the dest-dir option.  The return value will be
 # relative to the src/build dir.  The user may use the '$MODULE' or '${MODULE}'
@@ -1228,6 +1252,7 @@ sub get_module_path_dir
     my $destdir = get_dest_dir($module);
     my $srcbase = get_source_dir($module);
     $srcbase = get_build_dir($module) if $type eq 'build';
+    $destdir = get_dest_build_dir($module) if $type eq 'build';
 
     my $combined = "$srcbase/$destdir";