From db7e26ae8ee7f7441bd81a3cf59262e657560a27 Mon Sep 17 00:00:00 2001
From: Florian Nowarre <fnowarre@meshcloud.io>
Date: Tue, 29 Apr 2025 13:26:08 +0200
Subject: [PATCH] docs: update nix files

---
 default.nix | 39 ----------------------------
 flake.lock  | 27 +++++++++++++++++++
 flake.nix   | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 102 insertions(+), 39 deletions(-)
 delete mode 100644 default.nix
 create mode 100644 flake.lock
 create mode 100644 flake.nix

diff --git a/default.nix b/default.nix
deleted file mode 100644
index c8dc2b4..0000000
--- a/default.nix
+++ /dev/null
@@ -1,39 +0,0 @@
-{ pkgs ? import <nixpkgs> { }, system ? builtins.currentSystem }:
-
-let
-  # fake opentofu as terraform so that tools like terraform-docs pre-commit hook (which doesn't have tofu support)
-  # fall back to tofu
-  tofu_terraform =
-    pkgs.stdenv.mkDerivation {
-      name = "tofu-terraform";
-      phases = [ "installPhase" ];
-      installPhase = ''
-        mkdir -p $out/bin
-        echo '#!/usr/bin/env sh' > $out/bin/terraform
-        echo 'tofu $@' > $out/bin/terraform
-        chmod +x $out/bin/terraform
-      '';
-    };
-
-in
-
-pkgs.mkShell {
-  NIX_SHELL = "terraform-meshplatform-modules";
-  shellHook = ''
-    echo starting terraform-meshplatform-modules shell
-    terraform -v
-    tofu -v
-    terraform-docs -v
-    pre-commit --version
-  '';
-
-  buildInputs = [
-    pkgs.pre-commit
-    pkgs.opentofu
-    pkgs.tflint
-    pkgs.terraform-docs
-
-    # fake tofu as terraform
-    tofu_terraform
-  ];
-}
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..d14b9e9
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1735563628,
+        "narHash": "sha256-OnSAY7XDSx7CtDoqNh8jwVwh4xNL/2HaJxGjryLWzX8=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "b134951a4c9f3c995fd7be05f3243f8ecd65d798",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-24.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..f7cccaa
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,75 @@
+{
+  description = "Flake for terraform-gcp-meshplatform";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-24.05";
+  };
+
+  outputs = { self, nixpkgs }:
+
+  let
+    # These tools are pre-installed in github actions, so we can save the time for installing them.
+    github_actions_preinstalled = pkgs:
+      with pkgs;
+      [
+        awscli2
+        (azure-cli.withExtensions [ azure-cli.extensions.account ])
+        nodejs
+      ];
+
+    # core packages required in CI and not preinstalled in github actions
+    core_packages = pkgs:
+      let
+        tofu_terraform =
+          pkgs.stdenv.mkDerivation {
+            name = "tofu-terraform";
+            phases = [ "installPhase" ];
+            installPhase = ''
+              mkdir -p $out/bin
+              echo '#!/usr/bin/env sh' > $out/bin/terraform
+              echo 'tofu "$@"' >> $out/bin/terraform
+              chmod +x $out/bin/terraform
+            '';
+          };
+      in
+      with pkgs;
+      [
+        opentofu
+        terragrunt
+        tflint
+        tfupdate
+        terraform-docs
+        tofu_terraform
+        pre-commit
+      ];
+
+    importNixpkgs = system: import nixpkgs { inherit system; };
+
+    defaultShellForSystem = system:
+      let
+        pkgs = importNixpkgs system;
+      in {
+        default = pkgs.mkShell {
+          name = "terraform-gcp-meshplatform";
+          packages = (github_actions_preinstalled pkgs) ++ (core_packages pkgs);
+        };
+      };
+
+  in {
+    devShells = {
+      aarch64-darwin = defaultShellForSystem "aarch64-darwin";
+      x86_64-darwin = defaultShellForSystem "x86_64-darwin";
+      x86_64-linux = defaultShellForSystem "x86_64-linux" // {
+        github_actions =
+          let
+            pkgs = importNixpkgs "x86_64-linux";
+          in
+          pkgs.mkShell {
+            name = "terraform-gcp-meshplatform";
+            packages = (core_packages pkgs);
+          };
+      };
+    };
+  };
+}
+