first party nix (flake) support

flake.nix

@@ -0,0 +1,118 @@
+{
+  description = "rquickshare flake";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+  };
+
+  outputs =
+    inputs@{ nixpkgs, ... }:
+    let
+      inherit (nixpkgs) lib;
+      # definitely not tested, but i like it exposed, who knows
+      systems = lib.systems.flakeExposed;
+      forAllSystems = lib.genAttrs systems;
+      spkgs = system: nixpkgs.legacyPackages.${system}.pkgs;
+    in
+    {
+      packages = forAllSystems (
+        system: with spkgs system; rec {
+          tauri = cargo-tauri;
+          # we could use rustPlatform.buildRustPackage, but there cargoDeps doesn't work
+          rquickshare = let
+            pname = "rquickshare";
+            src = let fs = lib.fileset; in fs.toSource {
+              root = ./.;
+              fileset = fs.difference ./. (
+                fs.unions [
+                  ./flake.nix
+                  ./flake.lock
+                ]
+              );
+            };
+          in
+          stdenv.mkDerivation rec {
+            inherit src pname;
+            name = pname;
+            sourceRoot = "${src.name}/app/main";
+            corelibSourceRoot = "${src.name}/core_lib";
+            cargoRoot = "src-tauri";
+            corelibPath = "rqs_lib";
+            nativeBuildInputs = [
+              tauri.hook
+              pnpm.configHook
+              nodejs
+              moreutils
+              protobuf
+              jq
+              yq
+              rustPlatform.cargoSetupHook
+            ];
+            # seemingly the fetcher ignores cargoRoot (contrary to the docs)
+            cargoDeps = rustPlatform.fetchCargoVendor {
+              inherit src pname;
+              hash = cargoHash;
+              sourceRoot = "${sourceRoot}/${cargoRoot}";
+            };
+            cargoHash = "sha256-m+BHN0eCF8rwCBWQ94XWHP7vmtQMtT/9adFgcU0BDTQ=";
+            pnpmDeps = pnpm.fetchDeps {
+              inherit src sourceRoot pname;
+              hash = "sha256-ko0S934TnGDVbTrFkunHPt0e/pT5CVi4yorTi0WYqmc=";
+            };
+            postUnpack =
+              let
+                fullCorePath = "${sourceRoot}/${cargoRoot}/${corelibPath}";
+              in
+              ''
+                cp -r ${corelibSourceRoot} ${fullCorePath} && chmod -R +w ${fullCorePath}
+              '';
+            # remove macOS signing and relative links
+            postConfigure = ''
+              jq     'del(.bundle.macOS.signingIdentity, .bundle.macOS.hardenedRuntime)' src-tauri/tauri.conf.json | sponge src-tauri/tauri.conf.json
+              yq -iy '.importers.".".dependencies."@martichou/core_lib".specifier = "link:${corelibPath}" | .importers.".".dependencies."@martichou/core_lib".version = "link:${corelibPath}"' pnpm-lock.yaml
+              jq     '.dependencies."@martichou/core_lib" = "link:${corelibPath}"' package.json | sponge package.json
+              sed -i 's|path = "../../../core_lib"|path = "${corelibPath}"|' ${cargoRoot}/Cargo.toml
+            '';
+            checkPhase = "true"; # idk why checks fail, todo
+            installPhase =
+              let
+                path = "${cargoRoot}/target/${stdenv.hostPlatform.rust.cargoShortTarget}/release/bundle";
+              in
+              if stdenv.isDarwin then
+                ''
+                  mkdir -p $out/bin
+                  mv ${path}/macos $out/Applications
+                  echo "#!${lib.getExe zsh}" >> $out/bin/${name}
+                  echo "open -a $out/Applications/${name}.app" >> $out/bin/${name}
+                  chmod +x $out/bin/${name}
+                ''
+              else
+                ''
+                  mv ${path}/deb/*/data/usr $out
+                '';
+            meta = {
+              description = "Rust implementation of NearbyShare/QuickShare from Android for Linux";
+              homepage = "https://github.com/Martichou/rquickshare";
+              changelog = "https://github.com/Martichou/rquickshare/blob/master/CHANGELOG.md";
+              license = lib.licenses.gpl3Plus;
+              maintainers = with lib.maintainers; [ hannesgith ];
+              platforms = with lib.platforms; linux ++ darwin;
+              mainProgram = "rquickshare";
+            };
+          };
+          default = rquickshare;
+        }
+      );
+      devShells = forAllSystems (
+        system: with spkgs system; {
+          default = mkShell {
+            buildInputs = [
+              cargo
+              rustc
+              nodejs
+            ];
+          };
+        }
+      );
+    };
+}