Add flake

flake.lock

@@ -0,0 +1,96 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1766651565,
+        "narHash": "sha256-QEhk0eXgyIqTpJ/ehZKg9IKS7EtlWxF3N7DXy42zPfU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "3e2499d5539c16d0d173ba53552a4ff8547f4539",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1744536153,
+        "narHash": "sha256-awS2zRgF4uTwrOKwwiJcByDzDOdo3Q1rPZbiHQg/N38=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "18dd725c29603f582cf1900e0d25f9f1063dbf11",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1766890375,
+        "narHash": "sha256-0Zi7ChAtjq/efwQYmp7kOJPcSt6ya9ynSUe6ppgZhsQ=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "91e1f7a0017065360f447622d11b7ce6ed04772f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,49 @@
+{
+  description = "Basic flake for devshell environments I often use";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url  = "github:numtide/flake-utils";
+
+    rust-overlay.url = "github:oxalica/rust-overlay";
+  };
+
+  outputs = { self, nixpkgs, flake-utils, ... }@inputs:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+
+          overlays = [
+            (import inputs.rust-overlay)
+          ];
+        };
+
+        rust-bin-nightly = pkgs.rust-bin.selectLatestNightlyWith (toolchain: toolchain.default);
+        rust-bin-stable = pkgs.rust-bin.stable.latest.default;
+        rust-bin-nightly-wasm = pkgs.rust-bin.selectLatestNightlyWith (
+          toolchain: toolchain.default.override {
+            targets = [ "wasm32-unknown-unknown" ];
+          }
+        );
+
+        extraRustPkgs = with pkgs; [
+          pkg-config
+          openssl
+        ];
+      in
+      {
+        devShells.rust-stable = pkgs.mkShell {
+          buildInputs = [ rust-bin-stable ] ++ extraRustPkgs;
+        };
+
+        devShells.rust-nightly = pkgs.mkShell {
+          buildInputs = [ rust-bin-nightly ] ++ extraRustPkgs;
+        };
+
+        devShells.rust-nightly-wasm = pkgs.mkShell {
+          buildInputs = [ rust-bin-nightly-wasm ] ++ extraRustPkgs;
+        };
+      }
+    );
+}