From 006ce4d197f5abefa498b2848a87d7cf0ba6e380 Mon Sep 17 00:00:00 2001
From: Petar Kirov <petar.p.kirov@gmail.com>
Date: Wed, 30 Mar 2022 12:29:14 +0300
Subject: [PATCH] build(nix): Add Nix-based dev environment configuration

---
 .direnv/.gitkeep |  0
 .envrc           |  9 +++++++++
 .gitignore       |  7 +++++++
 flake.lock       | 43 +++++++++++++++++++++++++++++++++++++++++++
 flake.nix        | 15 +++++++++++++++
 shell.nix        | 17 +++++++++++++++++
 6 files changed, 91 insertions(+)
 create mode 100644 .direnv/.gitkeep
 create mode 100644 .envrc
 create mode 100644 flake.lock
 create mode 100644 flake.nix
 create mode 100644 shell.nix

diff --git a/.direnv/.gitkeep b/.direnv/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/.envrc b/.envrc
new file mode 100644
index 00000000..8e43c2ca
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,9 @@
+# shellcheck shell=bash
+
+if ! has nix_direnv_version || ! nix_direnv_version 1.6.1; then
+  source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/1.6.1/direnvrc" "sha256-aFwy76WtzXD7SVXWetpg+welXMZI/VcEUPQ2WUMXYSY="
+fi
+
+dotenv_if_exists
+nix_direnv_watch_file shell.nix
+use flake
diff --git a/.gitignore b/.gitignore
index 503790a9..fedf9bde 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,10 @@ __test__library__
 *.swp
 
 dlang-tour-test-library
+
+# Nix build artifact:
+result
+
+# Direnv:
+.direnv/*
+!.direnv/.gitkeep
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 00000000..d76dc6b2
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,43 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1648297722,
+        "narHash": "sha256-W+qlPsiZd8F3XkzXOzAoR+mpFqzm3ekQkJNa+PIh1BQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "0f8662f1319ad6abf89b3380dd2722369fc51ade",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1648390671,
+        "narHash": "sha256-u69opCeHUx3CsdIerD0wVSR+DjfDQjnztObqfk9Trqc=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ce8cbe3c01fd8ee2de526ccd84bbf9b82397a510",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 00000000..8dd9795a
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,15 @@
+{
+  description = "Dlang Tour";
+
+  inputs = {
+    nixpkgs.url = github:NixOS/nixpkgs/nixos-unstable;
+    flake-utils.url = github:numtide/flake-utils;
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.simpleFlake {
+      inherit self nixpkgs;
+      name = "dlang-tour";
+      shell = ./shell.nix;
+    };
+}
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 00000000..fb980b73
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,17 @@
+{ pkgs ? import <nixpkgs> { } }: with pkgs;
+mkShell {
+  buildInputs = [
+    figlet
+    glibc.static
+    zlib.static
+    (openssl.override { static = true; }).dev
+    dmd
+    dtools
+    dub
+    ldc
+  ];
+
+  shellHook = ''
+    figlet "Welcome  to Dlang Tour"
+  '';
+}