Make environment in EnvCommand mutable

src/shell_interface.rs

@@ -11,7 +11,7 @@ use std::process::Command;
 #[derive(Debug)]
 pub struct EnvCommand<'a, E> {
   command: ShellCommand,
-  environment: &'a E,
+  environment: &'a mut E,
 }
 
 #[derive(Debug, Clone)]
@@ -34,7 +34,7 @@ pub enum ShellCommand {
 }
 
 impl ShellCommand {
-  pub fn at<E>(self, environment: &E) -> EnvCommand<E> {
+  pub fn at<E>(self, environment: &mut E) -> EnvCommand<E> {
     EnvCommand {
       command: self,
       environment,
@@ -93,7 +93,7 @@ fn command_to_string(command: &Command) -> String {
     .join(" ")
 }
 
-fn build_command_from_shell_command(shell_command: &ShellCommand) -> Command {
+fn build_command_from_shell_command(_shell_command: &ShellCommand) -> Command {
   todo!()
 }
 
@@ -123,6 +123,8 @@ pub trait ShellInterface {
   }
 }
 
+//TODO implement shell interface for env command
+
 pub trait MaybeCast<T> {
   fn maybe_cast(&self) -> Option<&T>;
 }