meta: add nix flake to build on Linux

README.md

@@ -18,6 +18,8 @@ Requires `libsqlite-dev` and `libcurl4-gnutls-dev`, both compiled against `glibc
 ./gradlew linuxX64DistZip
 ```
 
+If you are on a system with a different glibc, try to use nix and build phoenixd inside the shell that you can create with the command `nix-shell .nix/shell.nix`.
+
 ### Native MacOS x64
 ```shell
 ./gradlew macosX64DistZip
@@ -31,4 +33,4 @@ Requires `libsqlite-dev` and `libcurl4-gnutls-dev`, both compiled against `glibc
 ### JVM
 ```shell
 ./gradlew distZip
-```
+```

flake.nix

@@ -0,0 +1,68 @@
+{
+  description = "Server equivalent of the popular Phoenix wallet";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+          overlays = [ ];
+        };
+
+        # Importing glibc 2.19 for compiling the recent version of curl
+        pkgs-glibc = import
+          (builtins.fetchTarball {
+            url = "https://github.com/NixOS/nixpkgs/archive/b6f505c60a2417d4fad4dc5245754e4e33eb4d40.tar.gz";
+            sha256 = "sha256:0hhb8sar8qxi179d6c5h6n8f7nm71xxqqbynjv8pldvpsmsxxzh9";
+          })
+          { inherit system; };
+      in
+      {
+        packages = {
+          default = pkgs.gnumake;
+        };
+        formatter = pkgs.nixpkgs-fmt;
+
+        devShell = pkgs.mkShellNoCC {
+          buildInputs = with pkgs; [
+            # build dependencies
+            git
+            pkg-config
+            zlib
+            wget
+
+            sqlite
+            jdk
+            gradle
+            kotlin
+
+            # Ok this should help you lean a few things
+            # See https://github.com/ACINQ/phoenixd/issues/1#issuecomment-2018205685
+            (pkgs.stdenv.mkDerivation {
+              name = "curl-7.87.0";
+              src = pkgs.fetchurl {
+                url = "https://curl.se/download/curl-7.87.0.tar.bz2";
+                sha256 = "sha256-XW4Sh2G3EQlG0Sdq/28PJm8rcm9eYZ9+CgV6R0FV8wc=";
+              };
+              buildInputs = [ pkgs.zlib pkgs.openssl.dev ];
+              configureFlags = [ "--with-zlib=${pkgs.zlib}" "--with-openssl=${pkgs.openssl.dev}" ];
+            })
+
+            ncurses
+          ] ++ [
+            pkgs-glibc.glibc
+          ];
+
+          shellHook = ''
+            # FIXME: this need to go in a build task
+            gradle linuxX64DistZip
+          '';
+        };
+      }
+    );
+}