Add flake

2026-01-11 06:12:51 +00:00 · 2025-09-12 14:14:52 -04:00
parent ccea96e120
commit 7eda9b1295
4 changed files with 501 additions and 0 deletions
--- a/flake.nix
+++ b/flake.nix
@@ -0,0 +1,134 @@
+{
+  description = "Expo RN devshells (local emulator / remote AVD)";
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    # Android SDK as packages
+    android-nixpkgs = {
+      url = "github:tadfisher/android-nixpkgs";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, android-nixpkgs, ... }:
+  let
+    systems = [ "x86_64-linux" "aarch64-darwin" "x86_64-darwin" ];
+    forAllSystems = f: nixpkgs.lib.genAttrs systems (system:
+      f {
+        pkgs = import nixpkgs {
+          inherit system;
+          overlays = [ android-nixpkgs.overlays.default ];
+          config.allowUnfree = true; # emulator is unfree
+        };
+      }
+    );
+  in
+  {
+    devShells = forAllSystems ({ pkgs }: let
+      makeAndroidSdk = mode:
+        let
+          androidSdk = pkgs.androidSdk (sdk:
+           if mode == "full" then
+              (with sdk; [
+                cmdline-tools-latest
+                platform-tools
+                emulator
+                build-tools-36-0-0
+                platforms-android-36
+                system-images-android-36-0-Baklava-google-apis-playstore-x86-64
+              ])
+            else if mode == "remote" then
+              (with sdk; [
+                cmdline-tools-latest   # ← required for a valid SDK
+                platform-tools         # adb/fastboot
+              ])
+            else
+              throw "makeAndroidSdk: unknown mode '${mode}'. Use \"full\" or \"remote\"."
+          );
+
+          # Standard path from nixpkgs' androidSdk wrapper
+          # https://ryantm.github.io/nixpkgs/languages-frameworks/android/#notes-on-environment-variables-in-android-projects
+          sdkRoot = "${androidSdk}/libexec/android-sdk";
+        in
+        {
+          inherit androidSdk sdkRoot;
+        };
+
+      fullAndroidSdk   = makeAndroidSdk "full";
+      remoteAndroidSdk = makeAndroidSdk "remote";
+
+      defaultPkgs = with pkgs; [
+        nodejs_22
+        nodePackages.pnpm
+        git
+        just
+        jq
+        watchman
+        jdk17
+        gradle_8
+      ];
+    in {
+
+      # Minimal: only universal dev tools you always want
+      default = pkgs.mkShell {
+        packages = defaultPkgs;
+      };
+
+      # Local emulator: full SDK + AVD bits for API 36
+      android-local = pkgs.mkShell {
+        packages = defaultPkgs ++ [ fullAndroidSdk.androidSdk ];
+        shellHook = ''
+          # Resolve SDK root robustly (libexec first, then share)
+          _CANDS=(
+            "${fullAndroidSdk.sdkRoot}"
+            "${fullAndroidSdk.androidSdk}/libexec/android-sdk"
+            "${fullAndroidSdk.androidSdk}/share/android-sdk"
+          )
+          for p in "''${_CANDS[@]}"; do
+            if [ -d "$p" ]; then
+              export ANDROID_SDK_ROOT="$p"
+              export ANDROID_HOME="$p"
+              break
+            fi
+          done
+
+          if [ -z "$ANDROID_SDK_ROOT" ]; then
+            echo "❌ Could not locate ANDROID_SDK_ROOT in Nix store. Check androidSdk composition."
+            return 1
+          fi
+
+          # Ensure Nix adb/emulator/cmdline-tools win over system tools
+          export PATH="$ANDROID_SDK_ROOT/platform-tools:$ANDROID_SDK_ROOT/emulator:$ANDROID_SDK_ROOT/cmdline-tools/latest/bin:$PATH"
+          hash -r
+
+          echo "ANDROID_SDK_ROOT=$ANDROID_SDK_ROOT"
+          which -a adb || true
+          which -a emulator || true
+          which -a avdmanager || true
+
+          # quick sanity
+          adb version || true
+          emulator -version || true
+          avdmanager --help >/dev/null || true
+        '';
+      };
+
+      # Remote AVD workflow: no emulator/image; add scrcpy + adb only
+      android-remote = pkgs.mkShell {
+      packages = defaultPkgs ++ [
+        remoteAndroidSdk.androidSdk  # provides adb/fastboot only
+        pkgs.scrcpy
+      ];
+      shellHook = ''
+        export ANDROID_SDK_ROOT="${remoteAndroidSdk.sdkRoot}"
+        export ANDROID_HOME="${remoteAndroidSdk.sdkRoot}"
+        export PATH="${remoteAndroidSdk.sdkRoot}/platform-tools:$PATH"
+        hash -r
+        echo "Using Nix adb from: $ANDROID_SDK_ROOT"
+        which -a adb
+        adb version || true
+        echo "Tip: ssh -N -L 5037:127.0.0.1:5037 user@remote && scrcpy"
+      '';
+    };
+    });
+  };
+}