Add the source packaging utility

scripts/create-source-archive.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+set -e
+
+if test "$#" -ne 1; then
+    echo "Usage: $0 <package-version>"
+    exit 1
+fi
+
+if test ! -d scripts; then
+    echo "Run this script from the project root."
+    exit 1
+fi
+
+package_version="$1"
+
+project_remote=$(git config --get remote.origin.url)
+project_name=$(basename -s .git "$project_remote")
+
+git-archive-all --prefix="$project_name"-"$package_version"/ "$project_name"-"$package_version".tar
+zopfli "$project_name"-"$package_version".tar
+rm -f "$project_name"-"$package_version".tar
+echo "$project_name"-"$package_version".tar.gz