From 73d2440ad4107b07505bbd24baafdb718b9753ff Mon Sep 17 00:00:00 2001
From: Matthias Pigulla <mp@webfactory.de>
Date: Thu, 8 Oct 2020 07:25:59 +0000
Subject: [PATCH] Add wrapper script for selecting the right deployment key

See https://www.webfactory.de/blog/using-multiple-ssh-deploy-keys-with-github.
---
 wrapper/ssh-deploy-key-wrapper.sh | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 wrapper/ssh-deploy-key-wrapper.sh

diff --git a/wrapper/ssh-deploy-key-wrapper.sh b/wrapper/ssh-deploy-key-wrapper.sh
new file mode 100644
index 0000000..06da0db
--- /dev/null
+++ b/wrapper/ssh-deploy-key-wrapper.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# The last argument is the command to be executed on the remote end, which is something
+# like "git-upload-pack 'webfactory/ssh-agent.git'". We need the repo path only, so we
+# loop over this last argument to get the last part of if.
+for last in ${!#}; do :; done
+
+# Don't use "exec" to run "ssh" below; then the trap won't work.
+key_file=$(mktemp -u)
+trap "rm -f $key_file" EXIT
+
+eval last=$last
+
+# Try to pick the right key
+ssh-add -L | grep --word-regexp --max-count=1 $last > $key_file
+
+ssh -i $key_file "$@"
\ No newline at end of file