Add explicit environment propagation

src/pty.rs

@@ -42,6 +42,7 @@ pub fn spawn_pty_session(
     shell: &str,
     cols: u16,
     rows: u16,
+    env: &[(String, String)],
     tx: mpsc::UnboundedSender<PtyOutput>,
 ) -> Result<PtyHandle> {
     let pty_system = NativePtySystem::default();
@@ -56,6 +57,9 @@ pub fn spawn_pty_session(
     let mut cmd = CommandBuilder::new(shell);
     cmd.env("TERM", "xterm-256color");
     cmd.env("COLORTERM", "truecolor");
+    for (name, value) in env {
+        cmd.env(name, value);
+    }
     cmd.env("SHELL", shell);
     if let Some(home) = dirs::home_dir() {
         cmd.env("HOME", home.as_os_str());