add git-split.sh (NOT WORKING!)

scripts/git-split.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+#
+# Copy a git file, keeping history.
+# Source: https://stackoverflow.com/a/53849613/3079831
+#
+# Buggy, "to" file has no history...
+# Maybe try:
+#   https://stackoverflow.com/a/75942970/3079831
+
+
+# if (( $# != 2 )) ; then
+#   echo "Usage: git-split.sh original copy"
+#   exit 1
+# fi
+
+# from="$1"
+# to="$2"
+# branch="split-file"
+# tmp="$from-temp-copy"
+
+# git switch -c "$branch"
+# git mv "$from" "$to"
+# git commit -n -m "Split $from to $to - step 1"
+
+# #REV=$(git rev-parse HEAD)
+# git switch -
+
+# git mv "$from" "$tmp"
+# git commit -n -m "Split $from to $to - step 2"
+# git merge "$branch"
+
+# git commit -a -n -m "Split $from to $to - step 3"
+# git mv "$tmp" "$from"
+# git commit -n -m "Split file $from to $to - step 4"
+
+# git branch -d "$branch"
+
+exit 0