From 989158ef4d429ca8d5a4b020013e3ca4b7c60198 Mon Sep 17 00:00:00 2001
From: 778a69cd <778a69cd@potsda.mn>
Date: Tue, 5 Mar 2024 17:10:04 +0100
Subject: [PATCH] development environment for flake

---
 flake.nix | 116 +++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 107 insertions(+), 9 deletions(-)

diff --git a/flake.nix b/flake.nix
index 2e91648be..68d202e4a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -92,20 +92,118 @@
         });
 
       devShells = forAllSystems (system:
-        let pkgs = nixpkgsFor.${system};
-        in {
+        let
+          pkgs = nixpkgsFor.${system};
+          settingsFormat = pkgs.formats.elixirConf { };
+        in
+        {
           default =
             pkgs.mkShell {
-              buildInputs = with pkgs; [
-                elixir
-                mix2nix
-                cmake
-                imagemagick
-                nodejs
-              ];
+              MIX_ENV = "dev";
+              PGUSER = "mobilizon";
+              PGDATABASE = "mobilizon";
+              MOBILIZON_CONFIG_PATH = settingsFormat.generate "runtime.exs" {
+                ":mobilizon" = {
+                  "Mobilizon.Web.Endpoint" = {
+                    server = true;
+                    url.host = "mobilizon.dev";
+                    http = {
+                      ip = settingsFormat.lib.mkTuple [ 0 0 0 0 0 0 0 1 ];
+                      port = 4000;
+                    };
+                    secret_key_base =
+                      "2q/l1WDx3RQQy7gZ1k001//6nc66moWUEJQyGuMK/z3zPLYW6FYtIgCkUzGP0+X/";
+                  };
+                  "Mobilizon.Web.Auth.Guardian" = {
+                    secret_key = "N8x7/tf0kInLFS2poO22g6OGPiMjSrDEhmk29nFqV35q7hQ0DtBt/cRYCsqBNp2L";
+                  };
+                  ":instance" = {
+                    name = "Mobilizon";
+                    description = "Change this to a proper description of your instance";
+                    hostname = "mobilizon.dev";
+                    registrations_open = true;
+                    email_from = "noreply@mobilizon.dev";
+                    email_reply_to = "noreply@mobilizon.dev";
+                  };
+                  "Mobilizon.Storage.Repo" = {
+                    adapter = settingsFormat.lib.mkAtom "Ecto.Adapters.Postgres";
+                    pool_size = 10;
+                    username = "mobilizon";
+                    database = "mobilizon";
+                    socket_dir = "/var/run/postgresql";
+                  };
+                };
+              };
+              buildInputs =
+                with pkgs; [
+                  elixir
+                  mix2nix
+                  cmake
+                  imagemagick
+                  nodejs
+                  inotify-tools
+                  (pkgs.writeShellScriptBin "build" ''
+                    ${elixir}/bin/mix deps.get
+                    ${elixir}/bin/mix deps.compile
+                    ${elixir}/bin/mix phx.digest
+                    ${nodejs}/bin/npm install
+                    ${nodejs}/bin/npm run build
+                  '')
+                  (pkgs.writeShellScriptBin "setup" ''
+                    ${elixir}/bin/mix ecto.create
+                    sudo -u postgres ${postgresql}/bin/psql -d mobilizon -c "create extension if not exists postgis; create extension if not exists unaccent; create extension if not exists pg_trgm;"
+                    ${elixir}/bin/mix ecto.migrate
+                  '')
+                  (pkgs.writeShellScriptBin "start" ''
+                    ${elixir}/bin/mix phx.server
+                  '')
+                  (pkgs.writeShellScriptBin "clean" ''
+                    rm -rf deps/ _build/ node_modules/
+                    sudo -u postgres ${postgresql}/bin/psql  -c "DROP DATABASE mobilizon;"
+                    sudo systemctl restart postgresql.service
+                  '')
+                ];
             };
         });
 
+      nixosModules.devSetup = { config, lib, pkgs, ... }:
+        let
+          cfg = config.mobilizonDevEnvironment;
+        in
+        {
+
+          options.mobilizonDevEnvironment = {
+            enable = lib.mkEnableOption
+              (lib.mdDoc "development environment for Mobilizon");
+            user = lib.mkOption {
+              type = lib.types.str;
+              description = "Unix user that runs the backend application to connect to the database";
+            };
+          };
+
+          config = lib.mkIf cfg.enable {
+            services.postgresql = {
+              enable = true;
+              ensureDatabases = [ "mobilizon" ];
+              ensureUsers = [
+                {
+                  name = "mobilizon";
+                  ensureDBOwnership = true;
+                }
+              ];
+              extraPlugins = with config.services.postgresql.package.pkgs; [ postgis ];
+              identMap = ''
+                map-mobilizon ${cfg.user} mobilizon
+              '';
+              authentication = ''
+                local all mobilizon ident map=map-mobilizon
+              '';
+            };
+
+          };
+
+        };
+
       overlays.default = final: prev: {
         inherit (self.packages."${prev.system}") mobilizon;
       };