From ac773d16076a17c895a39d493d2c91e8f2df3dc9 Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Wed, 21 Aug 2019 20:46:20 -0400
Subject: [PATCH] nixos/zsh: Fix tramp support
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

For a long time, TRAMP has not worked with ZSH NixOS servers. I
thought I fixed this in 0740f57e63af61694d14796286cb9204, but now
realize that was only half the problem. For TRAMP to start working
again ‘unsetopt zle’ was needed, otherwise the connection would hang.
In addition, I have a few more settings added that can apparenty
interfere with these settings.
---
 nixos/modules/programs/zsh/zsh.nix | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/nixos/modules/programs/zsh/zsh.nix b/nixos/modules/programs/zsh/zsh.nix
index 3cbfd8fa4d32..27f4166e1005 100644
--- a/nixos/modules/programs/zsh/zsh.nix
+++ b/nixos/modules/programs/zsh/zsh.nix
@@ -69,9 +69,7 @@ in
 
       promptInit = mkOption {
         default = ''
-          if [ "$TERM" != dumb ]; then
-              autoload -U promptinit && promptinit && prompt walters && setopt prompt_sp
-          fi
+          autoload -U promptinit && promptinit && prompt walters && setopt prompt_sp
         '';
         description = ''
           Shell script code used to initialise the zsh prompt.
@@ -213,6 +211,15 @@ in
 
         ${cfg.promptInit}
 
+        # Need to disable features to support TRAMP
+        if [ "$TERM" = dumb ]; then
+            unsetopt zle prompt_cr prompt_subst
+            unfunction precmd preexec
+            unset RPS1 RPROMPT
+            PS1='$ '
+            PROMPT='$ '
+        fi
+
         # Read system-wide modifications.
         if test -f /etc/zshrc.local; then
             . /etc/zshrc.local