Trigger git rebase directory detection breakdown

rebase_demo.sh

#!/bin/bash

# Create demo repo
rm -rf /tmp/demo
mkdir /tmp/demo && cd /tmp/demo
git init

# Create upstream branch
git checkout -b upstream
for p in a b c d e f g h i j k l m n o p q r s t u v w x y z a1 a2 a3 a5
do
    mkdir -p $p/base && echo "base" > $p/base/base.txt
    git add -A && git commit -m "Upstream base for $p"
done
for p in a b c d e f g h i j k l m n o p q r s t u v w x y z a1 a2 a3 a5
do
    mkdir -p $p/overlays/upstream
    echo "upstream_overlay" > $p/overlays/upstream/overlay.txt
    git add -A && git commit -m "Upstream overlay for $p"
    echo "file $p lalakis" > $p/overlays/upstream/file_1.txt
    echo "file" > $p/overlays/upstream/file_$p.txt
    echo "file" > $p/overlays/upstream/file_3.txt
    echo "file $p" > $p/overlays/upstream/file_$p.txt
    echo "file" > $p/overlays/upstream/file_5.txt
    git add -A && git commit -m "Upstream files for $p"
done


# Create restructured upstream branch
git checkout -b upstream-restructured upstream
mkdir -p new
for p in a b c d e f g h i j k l m n o p q r s t u v w x y z a1 a2 a3 a5
do
    git mv $p new/$p
    git add -A && git commit -m "Move $p to new/$p"
done

# Create downstream branch
git checkout -b downstream upstream
for p in a b c d e f g h i j k l m n o p q r s t u v w x y z a1 a2 a3 a5
do
    mkdir -p $p/overlays/develop && echo "overlay for $p" > $p/overlays/develop/overlay.txt
    git add -A && git commit -m "Add overlay for $p"
done

# Rebase downstream ontop of upstream-restructured
git checkout downstream
git -c merge.directoryRenames=true rebase -v -m --onto upstream-restructured upstream