Cleanup warnings and lint checks

Cargo.lock

@@ -295,7 +295,7 @@ dependencies = [
 
 [[package]]
 name = "runwhen"
-version = "0.0.6"
+version = "0.0.7"
 dependencies = [
  "clap",
  "humantime",

flake.nix

@@ -2,29 +2,22 @@
     description = "runwhen";
 
     inputs = {
-        nixpkgs.url = "github:NixOS/nixpkgs";
         flake-utils.url = "github:numtide/flake-utils";
-        rust-overlay = {
-            url = "github:oxalica/rust-overlay";
-            inputs.nixpkgs.follows = "nixpkgs";
-        };
         naersk.url = "github:nix-community/naersk";
         flake-compat = {
-            url = github:edolstra/flake-compat;
+            url = "github:edolstra/flake-compat";
             flake = false;
         };
     };
 
-    outputs = {self, nixpkgs, flake-utils, rust-overlay, naersk, flake-compat}:
+    outputs = {self, flake-utils, naersk, flake-compat}:
     flake-utils.lib.eachDefaultSystem (system: 
     let
-        overlays = [ rust-overlay.overlay ];
-        pkgs = import nixpkgs { inherit system overlays; };
         naersk-lib = naersk.lib."${system}";
     in
     {
-        defaultPackage = with pkgs;
-            naersk-lib.buildPackage rec {
+        inherit flake-compat;
+        defaultPackage = naersk-lib.buildPackage rec {
                 pname = "runwhen";
                 version = "0.0.6";
                 src = ./.;

src/exec.rs

@@ -95,6 +95,8 @@ impl CancelableProcess {
         }
     }
 
+    // NOTE(jwall): We want to actually use this some time when we figure out if it can be made to not block or not.
+    #[allow(dead_code)]
     pub fn check(&mut self) -> Result<Option<i32>, CommandError> {
         Ok(match self.handle {
             // TODO(jwall): This appears to block the thread despite the documenation. Figure out if this is fixable or not.