From 44cacd6b1cee00c3326d28bffdf18df0356b7204 Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@sbcglobal.net>
Date: Sat, 14 Jan 2017 20:34:23 -0500
Subject: Make them my own.

---
 parent-prune-empty-first | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100755 parent-prune-empty-first

(limited to 'parent-prune-empty-first')

diff --git a/parent-prune-empty-first b/parent-prune-empty-first
new file mode 100755
index 0000000..c9d73df
--- /dev/null
+++ b/parent-prune-empty-first
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+# Usage: git filter-branch -f --parent-filter ~/git-filters/parent-prune-empty-first HEAD
+
+has_empty_tree() {
+	[[ "$(git rev-parse "${1}^{tree}")" == 4b825dc642cb6eb9a060e54bf8d69288fbee4904 ]]
+}
+
+has_parents() {
+	git rev-parse "${1}^" &>/dev/null
+}
+
+for parent in $(cat); do
+	if [[ "$parent" == '-p' ]]; then
+		continue
+	fi
+	if has_empty_tree "$parent" && ! has_parents "$parent"; then
+		continue
+	fi
+	printf ' -p %s ' "$parent"
+done
+echo
-- 
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