Add Nix Flake

Author: adalessa

flake.lock

@@ -0,0 +1,53 @@
+{
+  description = "Flake for phphantom-lsp (local development)";
+
+  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 = import nixpkgs {
+          inherit system;
+        };
+
+        manifest = (pkgs.lib.importTOML ./Cargo.toml).package;
+      in
+      {
+        packages.default = self.packages.${system}.phpantom-lsp;
+        packages.phpantom-lsp = pkgs.rustPlatform.buildRustPackage rec {
+          pname = manifest.name;
+          cargoLock.lockFile = ./Cargo.lock;
+          version = manifest.version;
+
+          # Use current directory as the source
+          src = pkgs.lib.cleanSource ./.;
+
+          stubsSrc = pkgs.fetchFromGitHub {
+            owner = "JetBrains";
+            repo = "phpstorm-stubs";
+            rev = "3327932472f512d2eb9e122b19702b335083fd9d";
+            hash = "sha256-WN5DAvaw4FfHBl2AqSo1OcEthUm3lOpikdB78qy3cyY=";
+          };
+
+          postPatch = ''
+            mkdir -p stubs/jetbrains
+            cp -a ${stubsSrc} stubs/jetbrains/phpstorm-stubs
+            chmod u+wx stubs/jetbrains/phpstorm-stubs
+            echo "${stubsSrc.rev}" > stubs/jetbrains/phpstorm-stubs/.commit
+          '';
+
+          checkFlags = [
+            "--test"
+            "completion_inheritance"
+          ];
+
+          postInstall = ''
+            mv $out/bin/phpantom_lsp $out/bin/phpantom-lsp
+            ln -s $out/bin/phpantom-lsp $out/bin/phpantom_lsp
+          '';
+        };
+      });
+}