feat: add LegacyArgs, --store, and --eval-store (#37)

crates/runix/src/arguments/common.rs

@@ -1,15 +1,24 @@
 //! Arguments common for all mix commands
 
+use derive_more::{Deref, From};
+use runix_derive::ToArgs;
+
+use crate::command_line::flag::{Flag, FlagType};
 use crate::command_line::ToArgs;
 
 /// These arguments do not depend on the nix subcommand issued
 /// and refer to the options defined in
-/// - (libmain/common-args.cc)[https://github.com/NixOS/nix/blob/a6239eb5700ebb85b47bb5f12366404448361f8d/src/libmain/common-args.cc#L7-L81]
-/// - (nix/main.cc)[https://github.com/NixOS/nix/blob/b7e8a3bf4cbb2448db860f65ea13ef2c64b6883b/src/nix/main.cc#L66-L110]
-#[derive(Clone, Default, Debug)]
-pub struct NixCommonArgs {}
-impl ToArgs for NixCommonArgs {
-    fn to_args(&self) -> Vec<String> {
-        vec![]
-    }
+/// - [libmain/common-args.cc](https://github.com/NixOS/nix/blob/a6239eb5700ebb85b47bb5f12366404448361f8d/src/libmain/common-args.cc#L7-L81)
+/// - [libmain/shared.cc](https://github.com/NixOS/nix/blob/2d1d81114d72ace89ce08cd3bc93f4eb27a2975d/src/libmain/shared.cc#L177-L245)
+/// - [nix/main.cc](https://github.com/NixOS/nix/blob/b7e8a3bf4cbb2448db860f65ea13ef2c64b6883b/src/nix/main.cc#L66-L110)
+#[derive(Clone, Default, Debug, ToArgs)]
+pub struct NixCommonArgs {
+    pub store: Option<Store>,
+}
+
+#[derive(Clone, From, Debug, Deref, Default)]
+pub struct Store(String);
+impl Flag for Store {
+    const FLAG: &'static str = "--store";
+    const FLAG_TYPE: FlagType<Self> = FlagType::arg();
 }

crates/runix/src/arguments/eval.rs

@@ -11,9 +11,17 @@ use crate::default::flag::{Flag, FlagType};
 /// [libcmd/common-eval-args.cc](https://github.com/NixOS/nix/blob/a6239eb5700ebb85b47bb5f12366404448361f8d/src/libcmd/common-eval-args.cc#L14-L74)
 #[derive(Clone, Default, Debug, ToArgs)]
 pub struct EvaluationArgs {
+    pub eval_store: Option<EvalStore>,
     pub impure: Impure,
 }
 
+#[derive(Clone, From, Debug, Deref, Default)]
+pub struct EvalStore(String);
+impl Flag for EvalStore {
+    const FLAG: &'static str = "--eval-store";
+    const FLAG_TYPE: FlagType<Self> = FlagType::arg();
+}
+
 #[derive(Clone, From, Debug, Deref, Default)]
 pub struct Impure(bool);
 impl Flag for Impure {