git: upload-bundle: add command

git/README.md

@@ -16,6 +16,7 @@
 - [`git snapshot`](scripts/git-snapshot) - save/load the current `HEAD` plus staged changes plus unstaged changes - call without arguments to save, call with previous return value to load
 - [`git track`](scripts/git-track) - set current branch to track given remote and branch, defaulting to same branch name
 - [`git turbo-gc`](scripts/git-turbo-gc) - turbo garbage collect
+- [`git upload-bundle`](scripts/git-upload-bundle) - upload a bundle file to a remote repository
 
 ## Git Credential Manager Core WSL/Windows interop
 

git/scripts/git-upload-bundle

@@ -0,0 +1,7 @@
+#!/bin/sh
+set -o errexit
+if [ $# != 2 ]; then >&2 echo 'Arguments: <source.bundle> <remote url>'; exit 1; fi
+tmp_dir="$(mktemp --directory)"
+trap 'rm --force --recursive "$tmp_dir"' EXIT
+git clone --mirror "$1" "$tmp_dir"
+git -C "$tmp_dir" push --mirror "$2"