If available by default. This saves quite a pile of disk-space that
imo making it the default is justified.

Note that this will break the rebuild-nightly script for now,
follow-up patches will fix that.

Signed-off-by: Daniel Vetter <daniel.vet...@intel.com>
---
 dim | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/dim b/dim
index 90eb553c6575..80baf24e4ad7 100755
--- a/dim
+++ b/dim
@@ -1072,15 +1072,24 @@ function setup_aux_checkout # name remote
        echo "Setting up $dir ..."
 
        if [ ! -d $dir ]; then
-               git clone --reference=$DIM_PREFIX/$DIM_DRM_INTEL/.git 
$remote_url $dir
-               cd $dir
-               git config remote.origin.url $remote_url
-               echo "$DIM_PREFIX/$DIM_DRM_INTEL/.git/objects" > 
.git/objects/info/alternates
-               git repack -a -d -l
-               remote=origin
+               if git help worktree &> /dev/null ; then
+                       cd $DIM_PREFIX/$DIM_DRM_INTEL
+                       remote=`get_remote_name $remote_url`
+                       if ! git branch | grep $name > /dev/null ; then
+                               git branch --track $name $remote/$name
+                       fi
+                       git worktree add ../$dir $name
+               else
+                       git clone --reference=$DIM_PREFIX/$DIM_DRM_INTEL/.git 
$remote_url $dir
+                       cd $dir
+                       git config remote.origin.url $remote_url
+                       echo "$DIM_PREFIX/$DIM_DRM_INTEL/.git/objects" > 
.git/objects/info/alternates
+                       git repack -a -d -l
+                       remote=origin
+               fi
        else
                cd $dir
-               remote=`get_remote_name $drm_intel_ssh`
+               remote=`get_remote_name $remote_url`
        fi
        if ! git branch | grep $name > /dev/null ; then
                git checkout -t $remote/$name
-- 
2.9.3

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