From 6542a0f3f483eb4fdb96bc79910a6960c47e8c48 Mon Sep 17 00:00:00 2001
From: Gabriel Arazas <foo.dogsquared@gmail.com>
Date: Thu, 1 Sep 2022 09:57:47 +0800
Subject: [PATCH] shells/guile: init devshell

This is not a good devshell yet with incomplete toolset but it'll get
there.
---
 shells/default.nix |  2 ++
 shells/guile.nix   | 26 ++++++++++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 shells/guile.nix

diff --git a/shells/default.nix b/shells/default.nix
index 3ade4803..8284ff52 100644
--- a/shells/default.nix
+++ b/shells/default.nix
@@ -5,6 +5,8 @@ with pkgs; {
   gnu = callPackage ./gnu.nix { };
   gnome = callPackage ./gnome.nix { };
   nix = callPackage ./nix.nix { };
+  guile = callPackage ./guile.nix { };
+  guile3 = callPackage ./guile.nix { guile = guile_3_0; };
   hugo = callPackage ./hugo.nix { };
   rust = callPackage ./rust.nix { };
   tic-80 = callPackage ./tic-80.nix { };
diff --git a/shells/guile.nix b/shells/guile.nix
new file mode 100644
index 00000000..c57ad181
--- /dev/null
+++ b/shells/guile.nix
@@ -0,0 +1,26 @@
+{ mkShell
+, lib
+, guile
+, guile-hall
+}:
+
+let
+  guileVersion = lib.versions.majorMinor guile.version;
+in
+mkShell {
+  inherit guileVersion;
+  packages = [
+    guile
+    guile-hall
+  ];
+
+  # This is already properly exported through setup hooks but to make
+  # intentions clearer.
+  shellHook = ''
+    export GUILE_LOAD_PATH GUILE_LOAD_COMPILED_PATH
+
+    if test $guileVersion == "3.0"; then
+      export GUILE_EXTENSIONS_PATH
+    fi
+  '';
+}