Added nix flake dev templates

1 files changed, 40 insertions, 0 deletions

diff --git a/modules/templates/java/flake.nix b/modules/templates/java/flake.nix
new file mode 100644
index 0000000..d69e2c6
--- /dev/null
+++ b/modules/templates/java/flake.nix
@@ -0,0 +1,40 @@
+{
+  description = "Base dev env for Java";
+
+  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 {
+      devShells.default = pkgs.mkShell {
+        packages = with pkgs; [
+          jdk21
+          maven
+          gradle
+          jdt-language-server # LSP for editors
+        ];
+
+        shellHook = ''
+          echo "Java $(java -version 2>&1 | head -1)"
+
+          alias jbuild='find src -name "*.java" | xargs javac -d out && echo "Build success"'
+          alias jrun='jbuild && java -cp out src.Main'
+          alias jclean='rm -rf out && echo "Cleaned"'
+
+          mkdir -p out
+
+          echo "  jbuild  — compile all sources"
+          echo "  jrun    — compile and run"
+          echo "  jclean  — remove compiled output"
+        '';
+      };
+    });
+}