added --run and --runtime-input for Haskell

--run was for Haskell only partially implemented
and --runtime-input was completely missing.
They are useful for starting an lsp.

Author: xwjqv

nix-script-haskell/src/main.rs

@@ -37,6 +37,10 @@ struct Opts {
     #[clap(long, requires("shell"))]
     run: Option<String>,
 
+    /// In shell mode, run this command instead of a shell.
+    #[clap(long("runtime-input"), requires("shell"))]
+    runtime_input: Vec<String>,
+
     /// In shell mode, run a "pure" shell (that is, one that isolates the
     /// shell a little more from what you have in your environment.)
     #[clap(long, requires("shell"))]
@@ -96,6 +100,19 @@ impl Opts {
                 .arg(format!("ghcid {}", script.display()));
         }
 
+        if let Some(cmd) = self.run.as_deref() {
+            command
+                .arg("--run")
+                .arg(cmd);
+        }
+
+        if !self.runtime_input.is_empty() {
+            command.arg("--runtime-input");
+            for input in &self.runtime_input {
+                command.arg(input);
+            }
+        }
+
         command.arg(script);
         command.args(args);