From 0a0f1a16134a74868e10fc2062996825b7cc41f3 Mon Sep 17 00:00:00 2001
From: Stefan Kreutz <mail@skreutz.com>
Date: Fri, 19 Apr 2024 13:11:51 +0200
Subject: Add experimental Nix flake

---
 README.md   |  3 +++
 default.nix |  4 ++++
 flake.lock  | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 flake.nix   | 20 ++++++++++++++++++++
 jotpass.nix | 29 +++++++++++++++++++++++++++++
 overlay.nix |  4 ++++
 6 files changed, 121 insertions(+)
 create mode 100644 default.nix
 create mode 100644 flake.lock
 create mode 100644 flake.nix
 create mode 100644 jotpass.nix
 create mode 100644 overlay.nix

diff --git a/README.md b/README.md
index 0eb149c..08de240 100644
--- a/README.md
+++ b/README.md
@@ -35,3 +35,6 @@ follows:
     $ make
     $ sudo make install
 
+There's also an experimental Nix flake:
+
+    $ nix run git+https://git.skreutz.com/jotpass.git/?ref=nix
diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..869fc10
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,4 @@
+{ pkgs ? import <nixpkgs> {} }:
+{
+  jotpass = pkgs.callPackage ./jotpass.nix {};
+}
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..7bd5706
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1713297878,
+        "narHash": "sha256-hOkzkhLT59wR8VaMbh1ESjtZLbGi+XNaBN6h49SPqEc=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "66adc1e47f8784803f2deb6cacd5e07264ec2d5c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "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..dfe1752
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,20 @@
+{
+  description = "A BSD utility to generate random passwords suitable for handwriting";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = nixpkgs.legacyPackages.${system};
+      in {
+        overlays.default = import ./overlay.nix;
+        packages = {
+          jotpass = pkgs.callPackage ./jotpass.nix {};
+          default = self.packages.${system}.jotpass;
+        };
+      }
+    );
+}
diff --git a/jotpass.nix b/jotpass.nix
new file mode 100644
index 0000000..2bce578
--- /dev/null
+++ b/jotpass.nix
@@ -0,0 +1,29 @@
+{ lib, stdenv, oksh, outils, bc, makeBinaryWrapper }:
+stdenv.mkDerivation rec {
+  name = "jotpass-${version}";
+  version = "0.2.0-snapshot"; # TODO: set or infer correct version
+
+  src = ./.;
+
+  postPatch = ''
+    substituteInPlace jotpass.ksh --replace "/bin/ksh" "${oksh}/bin/oksh"
+  '';
+
+  nativeBuildInputs = [
+    makeBinaryWrapper
+  ];
+
+  buildInputs = [
+    oksh
+    outils
+    bc
+  ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp jotpass.ksh $out/bin/jotpass
+    mkdir -p $out/man/man1
+    cp jotpass.1 $out/man/man1/jotpass.1
+    wrapProgram $out/bin/jotpass --prefix PATH : ${lib.makeBinPath [ oksh outils bc ]}
+  '';
+}
diff --git a/overlay.nix b/overlay.nix
new file mode 100644
index 0000000..7f03286
--- /dev/null
+++ b/overlay.nix
@@ -0,0 +1,4 @@
+final: prev:
+{
+  jotpass = pkgs.callPackage ./jotpass.nix {}
+}
-- 
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