Initial version of testing + Nix flake

flake.nix

@@ -0,0 +1,52 @@
+{
+  description = "Simple zero-dependency tool to provision *nix machines";
+
+  inputs.nixpkgs.url = "nixpkgs/nixos-unstable";
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachSystem [ "x86_64-linux" ] (system:
+      let pkgs = nixpkgs.legacyPackages.${system}; in
+      rec {
+        devShell = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            dash
+            gnumake
+            shellcheck
+          ];
+        };
+
+        checks = let
+          commonDeps = with pkgs; [ gnumake shellcheck ];
+
+        in {
+          bash = pkgs.runCommand "lint" {
+            src = ./.;
+            nativeBuildInputs = commonDeps ++ (with pkgs; [ bash ]);
+          } ''
+            export SHELL="${pkgs.bash}/bin/bash"
+            make -C "$src" test-bash
+            touch "$out"
+          '';
+
+          dash = pkgs.runCommand "lint" {
+            src = ./.;
+            nativeBuildInputs = commonDeps ++ (with pkgs; [ dash ]);
+          } ''
+            export SHELL="${pkgs.dash}/bin/dash"
+            make -C "$src" test-dash
+            touch "$out"
+          '';
+
+          busybox = pkgs.runCommand "lint" {
+            src = ./.;
+            nativeBuildInputs = commonDeps ++ (with pkgs; [ busybox ]);
+          } ''
+            export SHELL="${pkgs.busybox}/bin/ash"
+            make -C "$src" test-ash
+            touch "$out"
+          '';
+        };
+      }
+    );
+}