From c6ed9b68f59a47251b0bdf975b664eabc5279ee0 Mon Sep 17 00:00:00 2001
From: Bruno Raoult <braoult@gmail.com>
Date: Mon, 17 Jun 2024 15:17:36 +0200
Subject: [PATCH] add git-split.sh

---
 scripts/git-split.sh | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 scripts/git-split.sh

diff --git a/scripts/git-split.sh b/scripts/git-split.sh
new file mode 100644
index 0000000..fab25d7
--- /dev/null
+++ b/scripts/git-split.sh
@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+#
+# Copy a git file, keeping history.
+# Source: https://stackoverflow.com/a/53849613/3079831
+
+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