From e3d11f9a9ca8cf1663de0182154683db250df095 Mon Sep 17 00:00:00 2001
From: Thomas Churchman <thomas@kepow.org>
Date: Wed, 23 Jun 2021 22:07:55 +0100
Subject: Improve machine store URI parsing

---
 src/libstore/machines.cc | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/src/libstore/machines.cc b/src/libstore/machines.cc
index b42e5e434..9843ccf04 100644
--- a/src/libstore/machines.cc
+++ b/src/libstore/machines.cc
@@ -16,13 +16,18 @@ Machine::Machine(decltype(storeUri) storeUri,
     decltype(mandatoryFeatures) mandatoryFeatures,
     decltype(sshPublicHostKey) sshPublicHostKey) :
     storeUri(
-        // Backwards compatibility: if the URI is a hostname,
-        // prepend ssh://.
+        // Backwards compatibility: if the URI is schemeless, is not a path,
+        // and is not one of the special store connection words, prepend
+        // ssh://.
         storeUri.find("://") != std::string::npos
-        || hasPrefix(storeUri, "local")
-        || hasPrefix(storeUri, "remote")
-        || hasPrefix(storeUri, "auto")
-        || hasPrefix(storeUri, "/")
+        || storeUri.find("/") != std::string::npos
+        || storeUri == "auto"
+        || storeUri == "daemon"
+        || storeUri == "local"
+        || hasPrefix(storeUri, "auto?")
+        || hasPrefix(storeUri, "daemon?")
+        || hasPrefix(storeUri, "local?")
+        || hasPrefix(storeUri, "?")
         ? storeUri
         : "ssh://" + storeUri),
     systemTypes(systemTypes),
-- 
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