From f47b72ed738e7f14a34514ae2c0509e0367804d9 Mon Sep 17 00:00:00 2001
From: Filipe da Silva Santos <filipessantos@academico.ufs.br>
Date: Wed, 14 Feb 2024 00:11:50 -0300
Subject: [PATCH] Add R environment

Contains minimal knitr dependencies for generating reports
---
 README.md    | 11 +++++++++++
 flake.nix    |  5 +++++
 r/.envrc     |  1 +
 r/flake.lock | 27 +++++++++++++++++++++++++++
 r/flake.nix  | 31 +++++++++++++++++++++++++++++++
 5 files changed, 75 insertions(+)
 create mode 100644 r/.envrc
 create mode 100644 r/flake.lock
 create mode 100644 r/flake.nix

diff --git a/README.md b/README.md
index 35a0d90..6c25ea9 100644
--- a/README.md
+++ b/README.md
@@ -52,6 +52,7 @@ Once your preferred template has been initialized, you can use the provided shel
 | [Protobuf]               | [`protobuf`](./protobuf/)     |
 | [Pulumi]                 | [`pulumi`](./pulumi/)         |
 | [Purescript]             | [`purescript`](./purescript/) |
+| [R]                      | [`r`](./r/)                   |
 | [Ruby]                   | [`ruby`](./ruby/)             |
 | [Rust]                   | [`rust`](./rust/)             |
 | [Scala]                  | [`scala`](./scala/)           |
@@ -223,6 +224,12 @@ The sections below list what each template includes. In all cases, you're free t
 - [pip] 23.0.1
 - [Virtualenv] 20.19.0
 
+### [`r`](./r/)
+
+- [R] 4.3.1
+- [rmarkdown] 2.22
+- [knitr] 1.43 ([pandoc] and [texlive])
+
 ### [`ruby`](./ruby/)
 
 - [Ruby] 3.2.2, plus the standard Ruby tools (`bundle`, `gem`, etc.)
@@ -300,6 +307,7 @@ All of the templates have only the root [flake](./flake.nix) as a flake input. T
 [iex]: https://hexdocs.pm/iex/IEx.html
 [java]: https://java.com
 [jq]: https://jqlang.github.io/jq
+[knitr]: https://yihui.org/knitr/
 [kotlin]: https://kotlinlang.org
 [latex]: https://www.latex-project.org/
 [leiningen]: https://leiningen.org
@@ -328,6 +336,7 @@ All of the templates have only the root [flake](./flake.nix) as a flake input. T
 [odoc]: https://github.com/ocaml/odoc
 [omnisharp-roslyn]: https://github.com/OmniSharp/omnisharp-roslyn
 [opa]: https://openpolicyagent.org
+[pandoc]: https://pandoc.org/
 [packer]: https://packer.io
 [pip]: https://pypi.org/project/pip
 [phoenix]: https://phoenixframework.org
@@ -339,7 +348,9 @@ All of the templates have only the root [flake](./flake.nix) as a flake input. T
 [purescript-language-server]: https://github.com/nwolverson/purescript-language-server
 [purs-tidy]: https://github.com/natefaubion/purescript-tidy
 [python]: https://python.org
+[r]: https://www.r-project.org/
 [release]: https://github.com/NixOS/nixpkgs/releases/tag/22.11
+[rmarkdown]: https://rmarkdown.rstudio.com/
 [ruby]: https://ruby-lang.org
 [rust]: https://rust-lang.org
 [rust-analyzer]: https://rust-analyzer.github.io
diff --git a/flake.nix b/flake.nix
index 100df82..2a0eaa5 100644
--- a/flake.nix
+++ b/flake.nix
@@ -176,6 +176,11 @@
           description = "Python development environment";
         };
 
+        r = {
+          path = ./r;
+          description = "R development environment";
+        };
+
         ruby = {
           path = ./ruby;
           description = "Ruby development environment";
diff --git a/r/.envrc b/r/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/r/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/r/flake.lock b/r/flake.lock
new file mode 100644
index 0000000..0f56f8b
--- /dev/null
+++ b/r/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1689261696,
+        "narHash": "sha256-LzfUtFs9MQRvIoQ3MfgSuipBVMXslMPH/vZ+nM40LkA=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "df1eee2aa65052a18121ed4971081576b25d6b5c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/r/flake.nix b/r/flake.nix
new file mode 100644
index 0000000..da334ef
--- /dev/null
+++ b/r/flake.nix
@@ -0,0 +1,31 @@
+{
+  description = "A Nix-flake-based R development environment";
+
+  inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*.tar.gz";
+
+  outputs = { self, nixpkgs }:
+    let
+      overlays = [
+        (final: prev: rec {
+          rEnv = prev.rWrapper.override {
+            packages = with prev.rPackages; [ knitr ];
+          };
+        })
+      ];
+      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+      forEachSupportedSystem = f: nixpkgs.lib.genAttrs supportedSystems (system: f {
+        pkgs = import nixpkgs { inherit overlays system; };
+      });
+    in
+    {
+      devShells = forEachSupportedSystem ({ pkgs }: {
+        default = pkgs.mkShell {
+          packages = with pkgs;
+            [ rEnv
+              pandoc
+              texlive.combined.scheme-full
+            ];
+        };
+      });
+    };
+}