From a524bf5c41c17975d7e85d87db1dc1d49e472f88 Mon Sep 17 00:00:00 2001
From: Miran Bastaja <miran.bastaja04@gmail.com>
Date: Tue, 30 Jul 2024 16:12:20 +0200
Subject: Initial commit

---
 .gitignore                |  1 +
 README.md                 | 14 ++++++++++++++
 examples/simple/flake.nix | 29 +++++++++++++++++++++++++++++
 flake.lock                | 39 +++++++++++++++++++++++++++++++++++++++
 flake.nix                 | 42 ++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 125 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 examples/simple/flake.nix
 create mode 100644 flake.lock
 create mode 100644 flake.nix

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f1a6fb8
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*result*
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..9c9027e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,14 @@
+# Minimal flake utils
+
+This repo contains random bits of code that I often use when creating flakes.
+
+## Included functions
+
+### `eachSystem :: (<system> -> attrs)`
+
+Esentially equivalent to [flake-utils' eachDefaultSystem](https://github.com/numtide/flake-utils/blob/b1d9ab70662946ef0850d488da1c9019f3a9752a/README.md#eachdefaultsystem--system---attrs)
+
+### `mkMinimalShell :: ( {name  ? "nix-shell", packages ? [], inputsFrom ? [], shellHook ? "", ...} -> derivation)`
+
+Like [nixpkgs' mkShell](https://ryantm.github.io/nixpkgs/builders/special/mkshell/) but pulls in
+fewer dependencies. The extra arguments (...) are all the attributes of `stdenv.mkDerivation`.
diff --git a/examples/simple/flake.nix b/examples/simple/flake.nix
new file mode 100644
index 0000000..366464d
--- /dev/null
+++ b/examples/simple/flake.nix
@@ -0,0 +1,29 @@
+{
+  description = "futils demo.";
+
+  inputs.futils = {
+    url = "git+https://git.sorre.xyz/miranb/futils";
+    inputs.nixpkgs.follows = "nixpkgs";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      futils,
+    }:
+    futils.lib.eachSystem (
+      system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in
+      {
+        devShells.default = futils.lib.mkMinimalShell pkgs {
+          packages = with pkgs; [
+            git
+            hello
+          ];
+        };
+      }
+    );
+}
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..0198db3
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,39 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 0,
+        "narHash": "sha256-+W5eZOhhemLQxelojLxETfbFbc19NWawsXBlapYpqIA=",
+        "path": "/nix/store/70y8v9qfn34sdfsnwh3l9772lk4rpfiy-source",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "systems": "systems"
+      }
+    },
+    "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
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..4016d27
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,42 @@
+{
+  description = "Mashup of various utility functions that I use often.";
+
+  inputs = {
+    systems.url = "github:nix-systems/default";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      systems,
+    }:
+    let
+      stdenvMinimal = nixpkgs.stdenvNoCC.override {
+        cc = null;
+        preHook = "";
+        allowedRequsites = null;
+        initialPath = nixpkgs.lib.filter (
+          a: nixpkgs.lib.hasPrefix "coreutils" a.name
+        ) nixpkgs.stdenvNoCC.initialPath;
+        extraNativeBuildInputs = [ ];
+      };
+    in
+    {
+      lib = {
+        # Basically equivalent to flake-utils' eachDefaultSystem
+        eachSystem = nixpkgs.lib.genAttrs (import systems);
+
+        # Like mkShell, but with less dependencies.
+        # See https://fzakaria.com/2021/08/02/a-minimal-nix-shell.html
+        minimalMkShell = pkgs: pkgs.mkShell.override { stdenv = stdenvMinimal; };
+      };
+
+      templates = {
+        eachSystem = {
+          path = ./examples/simple;
+          description = "Example showing off a few simple functions.";
+        };
+      };
+    };
+}
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