From aa1542cfc09bd369b12f2a07f0423ab3e4285aa7 Mon Sep 17 00:00:00 2001
From: sawka <mike.sawka@gmail.com>
Date: Wed, 21 Sep 2022 23:51:16 -0700
Subject: [PATCH] don't overwrite mshell if no input received on stdin during
 install

---
 pkg/shexec/shexec.go | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/pkg/shexec/shexec.go b/pkg/shexec/shexec.go
index aa9d683e..b8ae79e7 100644
--- a/pkg/shexec/shexec.go
+++ b/pkg/shexec/shexec.go
@@ -59,10 +59,13 @@ fi
 const InstallCommand = `
 printf "\n##N{\"type\": \"init\", \"notfound\": true, \"uname\": \"%s|%s\"}\n" "$(uname -s)" "$(uname -m)";
 mkdir -p ~/.mshell/;
-cat > ~/.mshell/mshell.temp; 
-mv ~/.mshell/mshell.temp ~/.mshell/mshell;
-chmod a+x ~/.mshell/mshell;
-~/.mshell/mshell --single --version
+cat > ~/.mshell/mshell.temp;
+if [[ -s ~/.mshell/mshell.temp ]]
+then
+  mv ~/.mshell/mshell.temp ~/.mshell/mshell;
+  chmod a+x ~/.mshell/mshell;
+  ~/.mshell/mshell --single --version
+fi
 `
 
 const RunCommandFmt = `%s`