feat: add elixir phoenix template

flake.nix

@@ -68,6 +68,10 @@
           description = "Crane + Fenix flake with mold for faster local builds.";
           path = ./templates/rust;
         };
+        templates.elixir-phoenix = {
+          description = "A flake for building development environment of Phoenix project.";
+          path = ./templates/elixir-phoenix;
+        };
       };
 
       # Define your clan

templates/elixir-phoenix/flake.nix

@@ -0,0 +1,103 @@
+{
+  description = "A flake for building development environment of Phoenix project.";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/master";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = {
+    nixpkgs,
+    flake-utils,
+    ...
+  }:
+    flake-utils.lib.eachDefaultSystem (
+      system: let
+        pkgs = nixpkgs.legacyPackages.${system};
+        erl = pkgs.beam.interpreters.erlang_27;
+        erlangPackages = pkgs.beam.packagesWith erl;
+        elixir = erlangPackages.elixir;
+      in {
+        packages = let
+          version = "0.1.0";
+          src = ./.;
+          mixFodDeps = erlangPackages.fetchMixDeps {
+            inherit version src;
+            pname = "example";
+            sha256 = "";
+          };
+          translatedPlatform =
+            pkgs.lib.getAttr
+            system
+            {
+              aarch64-darwin = "macos-arm64";
+              aarch64-linux = "linux-arm64";
+              armv7l-linux = "linux-armv7";
+              x86_64-darwin = "macos-x64";
+              x86_64-linux = "linux-x64";
+            };
+        in rec {
+          default = erlangPackages.mixRelease {
+            inherit version src mixFodDeps;
+            pname = "example";
+
+            preInstall = ''
+              ln -s ${pkgs.tailwindcss}/bin/tailwindcss _build/tailwind-${translatedPlatform}
+              ln -s ${pkgs.esbuild}/bin/esbuild _build/esbuild-${translatedPlatform}
+
+              ${elixir}/bin/mix assets.deploy
+              ${elixir}/bin/mix phx.gen.release
+            '';
+          };
+          dockerImage = pkgs.dockerTools.buildImage {
+            name = "example";
+            config = {
+              Entrypoint = "${default}/bin/example";
+              Cmd = "start";
+            };
+          };
+        };
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs;
+            [
+              erl
+              elixir
+              lexical
+              erlangPackages.elixir-ls
+              next-ls
+            ]
+            ++ lib.optionals stdenv.isLinux [
+              # For ExUnit Notifier on Linux.
+              libnotify
+
+              # For file_system on Linux.
+              inotify-tools
+            ]
+            ++ lib.optionals stdenv.isDarwin [
+              # For ExUnit Notifier on macOS.
+              terminal-notifier
+
+              # For file_system on macOS.
+              darwin.apple_sdk.frameworks.CoreFoundation
+              darwin.apple_sdk.frameworks.CoreServices
+            ];
+
+          shellHook = ''
+            # allows mix to work on the local directory
+            mkdir -p .nix/{mix,hex}
+            export MIX_HOME=$PWD/.nix/mix
+            export HEX_HOME=$PWD/.nix/hex
+            export ERL_LIBS=$HEX_HOME/lib/erlang/lib
+
+            # concats PATH
+            export PATH=$MIX_HOME/bin:$PATH
+            export PATH=$MIX_HOME/escripts:$PATH
+            export PATH=$HEX_HOME/bin:$PATH
+
+            # enables history for IEx
+            export ERL_AFLAGS="-kernel shell_history enabled -kernel shell_history_path '\"$PWD/.nix/erlang-history\"'"
+          '';
+        };
+      }
+    );
+}