From 0ddebdeee66eeaaaf521efc1eba2c718f89bc936 Mon Sep 17 00:00:00 2001
From: Alex Jurkiewicz <alex@jurkiewi.cz>
Date: Wed, 9 Aug 2023 09:50:34 +0800
Subject: [PATCH] Add support for SSHUTTLE_ARGS environment variable

---
 docs/manpage.rst    | 12 ++++++++++++
 sshuttle/cmdline.py | 11 ++++++++++-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/docs/manpage.rst b/docs/manpage.rst
index fa1106f..2053eee 100644
--- a/docs/manpage.rst
+++ b/docs/manpage.rst
@@ -321,6 +321,18 @@ annotations. For example::
     192.168.63.0/24
 
 
+Environment Variable
+--------------------
+
+You can specify command line options with the `SSHUTTLE_ARGS` environment
+variable. If a given option is defined in both the environment variable and
+command line, the value on the command line will take precedence.
+
+For example::
+
+    SSHUTTLE_ARGS="-e 'ssh -v' --dns" sshuttle -r example.com 0/0
+
+
 Examples
 --------
 
diff --git a/sshuttle/cmdline.py b/sshuttle/cmdline.py
index eaca961..5480815 100644
--- a/sshuttle/cmdline.py
+++ b/sshuttle/cmdline.py
@@ -1,5 +1,8 @@
+import os
 import re
+import shlex
 import socket
+import sys
 import sshuttle.helpers as helpers
 import sshuttle.client as client
 import sshuttle.firewall as firewall
@@ -11,7 +14,13 @@ from sshuttle.sudoers import sudoers
 
 
 def main():
-    opt = parser.parse_args()
+    if 'SSHUTTLE_ARGS' in os.environ:
+        env_args = shlex.split(os.environ['SSHUTTLE_ARGS'])
+    else:
+        env_args = []
+    args = [*env_args, *sys.argv[1:]]
+
+    opt = parser.parse_args(args)
 
     if opt.sudoers_no_modify:
         # sudoers() calls exit() when it completes