refactor(nix): add shell completion and avoid impure (sxyazi#293)

Author: XYenon

Diff for: .envrc

@@ -0,0 +1 @@
+use flake

Diff for: .gitignore

@@ -5,4 +5,4 @@ config/completions
 
 result
 result-*
-.devenv*
+.direnv

Diff for: flake.lock

@@ -2,16 +2,30 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
     flake-utils.url = "github:numtide/flake-utils";
-    devenv = {
-      url = "github:cachix/devenv";
-      inputs.nixpkgs.follows = "nixpkgs";
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs = {
+        nixpkgs.follows = "nixpkgs";
+        flake-utils.follows = "flake-utils";
+      };
     };
   };
 
-  outputs = { self, nixpkgs, flake-utils, ... } @ inputs:
+  outputs = { self, nixpkgs, flake-utils, rust-overlay, ... } @ inputs:
+    let
+      # Nixpkgs overlays
+      overlays = [
+        rust-overlay.overlays.default
+        (final: prev: {
+          rustToolchain = final.rust-bin.stable.latest.default.override {
+            extensions = [ "rust-src" ];
+          };
+        })
+      ];
+    in
     flake-utils.lib.eachDefaultSystem (system:
       let
-        pkgs = nixpkgs.legacyPackages.${system};
+        pkgs = import nixpkgs { inherit system overlays; };
         versionSuffix = "pre${builtins.substring 0 8 (self.lastModifiedDate or self.lastModified or "19700101")}_${self.shortRev or "dirty"}";
         version = (builtins.fromTOML (builtins.readFile ./app/Cargo.toml)).package.version + versionSuffix;
         yazi = pkgs.callPackage ./nix/yazi.nix { inherit version; };

Diff for: flake.nix

@@ -1,7 +1,10 @@
-{ pkgs, inputs, ... }:
+{ pkgs, ... }:
 
 pkgs.mkShell {
   packages = with pkgs; [
+    rustToolchain
+    rust-analyzer
+
     nodePackages.cspell
 
     file
@@ -15,18 +18,11 @@ pkgs.mkShell {
     zoxide
   ];
 
-  buildInputs = pkgs.lib.optionals pkgs.stdenv.isDarwin (
-    with pkgs.darwin.apple_sdk.frameworks; [ Foundation ]
+  buildInputs = with pkgs; lib.optionals stdenv.isDarwin (
+    with darwin.apple_sdk.frameworks; [ Foundation ]
   );
 
-  inputsFrom = [
-    (inputs.devenv.lib.mkShell {
-      inherit inputs pkgs;
-      modules = [
-        ({ pkgs, ... }: {
-          languages.rust.enable = true;
-        })
-      ];
-    })
-  ];
+  env = {
+    RUST_BACKTRACE = "1";
+  };
 }

Diff for: nix/shell.nix

@@ -3,6 +3,7 @@
 , lib
 
 , makeWrapper
+, installShellFiles
 , stdenv
 , darwin
 
@@ -34,7 +35,7 @@ rustPlatform.buildRustPackage {
 
   cargoLock.lockFile = ../Cargo.lock;
 
-  nativeBuildInputs = [ makeWrapper ];
+  nativeBuildInputs = [ makeWrapper installShellFiles ];
   buildInputs = lib.optionals stdenv.isDarwin (
     with darwin.apple_sdk.frameworks; [ Foundation ]
   );
@@ -55,6 +56,10 @@ rustPlatform.buildRustPackage {
     ''
       wrapProgram $out/bin/yazi \
          --prefix PATH : "${makeBinPath runtimePaths}"
+      installShellCompletion --cmd yazi \
+        --bash ./config/completions/yazi.bash \
+        --fish ./config/completions/yazi.fish \
+        --zsh  ./config/completions/_yazi
     '';
 
   meta = with lib; {