From 15a4c40852cca4693c8b3b483bc0280efb03cd42 Mon Sep 17 00:00:00 2001
From: Daniel Silverstone <dsilvers@digital-scurf.org>
Date: Tue, 28 Sep 2021 21:54:18 +0100
Subject: direnv: Add basic flake and direnv setup

Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>
---
 .envrc     |  1 +
 flake.lock | 40 ++++++++++++++++++++++++++++++++++++++++
 flake.nix  | 37 +++++++++++++++++++++++++++++++++++++
 3 files changed, 78 insertions(+)
 create mode 100644 .envrc
 create mode 100644 flake.lock
 create mode 100644 flake.nix

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..38de242
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,40 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1631561581,
+        "narHash": "sha256-3VQMV5zvxaVLvqqUrNz3iJelLw30mIVSfZmAaauM3dA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "7e5bf3925f6fbdfaf50a2a7ca0be2879c4261d19",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1632639184,
+        "narHash": "sha256-fRLxre+gPxIkjFVj17O68pyAWU1cxT20XFOiulIWzRw=",
+        "path": "/nix/store/mz8vpyg587llb4c802w96m956icc39vm-source",
+        "rev": "fd8a7fd07da0f3fc0e27575891f45c2f88e5dd44",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..c19f3bc
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,37 @@
+# This is a nix "flake" which is used both by `direnv` and to offer
+# a quick way to acquire `subplot` in a nix/nixos environment.
+# If you have `direnv` support, just allow this tree and you should
+# be able to develop `subplot`.  If you use this as a package flake
+# then the `subplot` package derivation is available in the usual way
+
+{
+  inputs = { flake-utils.url = "github:numtide/flake-utils"; };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        test-python-packages = python-packages:
+          with python-packages;
+          [ requests ];
+
+      in {
+        devShell = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            stdenv
+            graphviz
+            plantuml
+            pandoc
+            texlive.combined.scheme-medium
+            daemonize
+            librsvg
+            (python3.withPackages test-python-packages)
+          ];
+          shellHook = ''
+            export SUBPLOT_DOT_PATH=${pkgs.graphviz}/bin/dot
+            export SUBPLOT_JAVA_PATH=${pkgs.jre}/bin/java
+            export SUBPLOT_PLANTUML_JAR_PATH=${pkgs.plantuml}/lib/plantuml.jar
+          '';
+        };
+      });
+}
-- 
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