From 2119dbcca14d4996087b50631f18102f2e0339f1 Mon Sep 17 00:00:00 2001
From: Break Yang <BreakDS@gmail.com>
Date: Sat, 24 Jul 2021 18:31:50 -0700
Subject: [PATCH] Import alf-nix-devenv as the nix-based development
 environment. (#922)

---
 README.md  |  8 ++++++
 flake.lock | 80 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 flake.nix  | 19 +++++++++++++
 3 files changed, 107 insertions(+)
 create mode 100644 flake.lock
 create mode 100644 flake.nix

diff --git a/README.md b/README.md
index 5226616dc..16aadca3f 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,14 @@ cd alf
 pip install -e .
 ```
 
+**For Nix Users**: There is a built-in Nix-based development environment defined in [flake.nix](./flake.nix). To activate it, run
+
+```bash
+$ nix develop
+```
+
+in the root of your local repository.
+
 ## Documentation
 
 You can read the [ALF documentation here](https://alf.readthedocs.io/).
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 000000000..3627cc67d
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,80 @@
+{
+  "nodes": {
+    "alf-devenv": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "utils": "utils"
+      },
+      "locked": {
+        "lastModified": 1626997680,
+        "narHash": "sha256-osKD7YhkFy2VfYOqcFQzrsT0MmATUdp7VGIfr/0B76s=",
+        "owner": "HorizonRobotics",
+        "repo": "alf-nix-devenv",
+        "rev": "97f7f1847345a3df094513f74e6e5eb53bfd46e8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "HorizonRobotics",
+        "repo": "alf-nix-devenv",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1622516815,
+        "narHash": "sha256-ZjBd81a6J3TwtlBr3rHsZspYUwT9OdhDk+a/SgSEf7I=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "7e9b0dff974c89e070da1ad85713ff3c20b0ca97",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "21.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "alf-devenv": "alf-devenv",
+        "nixpkgs": "nixpkgs",
+        "utils": "utils_2"
+      }
+    },
+    "utils": {
+      "locked": {
+        "lastModified": 1623875721,
+        "narHash": "sha256-A8BU7bjS5GirpAUv4QA+QnJ4CceLHkcXdRp4xITDB0s=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "f7e004a55b120c02ecb6219596820fcd32ca8772",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "utils_2": {
+      "locked": {
+        "lastModified": 1623875721,
+        "narHash": "sha256-A8BU7bjS5GirpAUv4QA+QnJ4CceLHkcXdRp4xITDB0s=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "f7e004a55b120c02ecb6219596820fcd32ca8772",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 000000000..6eb3bf0a0
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,19 @@
+{
+  description = "Agent Learning Framework Development Environment";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/21.05";
+
+    utils.url = "github:numtide/flake-utils";
+    utils.inputs.nixpkgs.follows = "nixpkgs";
+
+    alf-devenv.url = "github:HorizonRobotics/alf-nix-devenv";
+    alf-devenv.inputs.nixpkgs.follows = "nixpkgs";
+  };
+
+  outputs = { self, nixpkgs, ... }@inputs: inputs.utils.lib.eachSystem [
+    "x86_64-linux" "i686-linux" "aarch64-linux" "x86_64-darwin"
+  ] (system: {
+    devShell = inputs.alf-devenv.devShell."${system}";
+  });
+}