nix: add flake + packaging

.gitignore

@@ -0,0 +1 @@
+result

flake.nix

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+{
+  description = "phpggc - PHP Generic Gadget Chains";
+
+  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; };
+        phpggc = pkgs.callPackage ./package.nix { };
+      in
+      {
+        packages = {
+          default = phpggc;
+          phpggc = phpggc;
+        };
+
+        apps.default = flake-utils.lib.mkApp { drv = phpggc; };
+
+        devShells.default = import ./shell.nix { inherit pkgs; };
+      });
+}

package.nix

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+{ lib
+, stdenvNoCC
+, php
+, makeWrapper
+}:
+
+stdenvNoCC.mkDerivation rec {
+  pname = "phpggc";
+  version = "0-unstable";
+
+  src = lib.cleanSource ./.;
+
+  nativeBuildInputs = [
+    makeWrapper
+  ];
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/share/phpggc
+    cp -R gadgetchains lib templates phpggc LICENSE README.md Dockerfile test-gc-compatibility.py $out/share/phpggc/
+    chmod 0644 $out/share/phpggc/phpggc
+
+    mkdir -p $out/bin
+    makeWrapper ${php}/bin/php $out/bin/phpggc \
+      --run "cd $out/share/phpggc" \
+      --add-flags "-d phar.readonly=0 $out/share/phpggc/phpggc"
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "PHP Generic Gadget Chains";
+    homepage = "https://github.com/ambionics/phpggc";
+    license = licenses.asl20;
+    platforms = platforms.all;
+    mainProgram = "phpggc";
+  };
+}

shell.nix

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+{ pkgs ? import <nixpkgs> { } }:
+
+let
+  phpggc = pkgs.callPackage ./package.nix { };
+  composer = pkgs.php.packages.composer;
+in
+pkgs.mkShell {
+  packages = [
+    phpggc
+    pkgs.php
+    composer
+    pkgs.curl
+    pkgs.python3
+    pkgs.python3Packages.rich
+  ];
+}