Add a script to create patches of tar

scripts/patch-tar.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+set -e
+
+# This script generates a "redox.patch" for a tar-based recipe
+
+if [ -z "$1" ]
+then
+    echo "Generates a 'redox.patch' for a tar-based recipe"
+    echo ""
+    echo "Usage: $0 <recipe-name>"
+    exit 1
+fi
+
+RECIPE_PATH=$(make find.$1)
+RECIPE_PATH=${RECIPE_PATH//$'\r'/}
+
+if [ ! -d "$RECIPE_PATH/source" ]; then
+    echo "Error: 'source' directory not found"
+    exit 1
+fi
+
+if [ ! -f "$RECIPE_PATH/source.tar" ]; then
+    echo "Error: 'source.tar' not found"
+    exit 1
+fi
+
+export TZ=UTC
+set -x
+
+cd $RECIPE_PATH
+mv source source-new
+mkdir source
+tar xf source.tar -C source --strip-components=1
+diff -ruwN source source-new > redox.patch || true
+rm -rf source
+mv source-new source