libkookie: introduce development shells module

apps/servers/octopus/shell.nix

@@ -1,10 +1,5 @@
-with import <nixpkgs> {};
-
-stdenv.mkDerivation {
-  name = "webgit";
-  buildInputs = with pkgs; [
-    rustracer rustup clangStdenv
-
-    cargo-watch openssl pkg-config
-  ];
+import <shells/rust/stable> {
+  userPackages = (pkgs: with pkgs; [
+    openssl pkg-config
+  ]);
 }

infra/libkookie/build

@@ -21,6 +21,7 @@ function build {
             -I "nixpkgs-overlays=$DIR/overlays" \
             -I "home-manager=$DIR/home-manager" \
             -I "modules=$DIR/modules" \
+            -I "shells=$DIR/shells" \
             -I "configuration=$DIR/configuration" \
             --out-link "$OUT" "$@"
 }
@@ -49,6 +50,7 @@ function vmimage {
               -I "nixpkgs-overlays=$DIR/overlays" \
               -I "home-manager=$DIR/home-manager" \
               -I "modules=$DIR/modules" \
+              -I "shells=$DIR/shells" \
               -I "configuration=$DIR/configuration" \
               --argstr system x86_64-linux "$@"
 

infra/libkookie/configuration/nix/default.nix

@@ -8,6 +8,7 @@
     "home-manager=/run/current-system/libkookie/home-manager"
     "nixpkgs-overlays=/run/current-system/libkookie/overlays"
     "nixpkgs=/run/current-system/libkookie/nixpkgs/unstable"
+    "shells=/run/current-system/libkookie/shells"
   ];
 
   system.extraSystemBuilderCmds = ''

infra/libkookie/overlays/default.nix

@@ -25,3 +25,6 @@ self: super: {
   iosevka = self.callPackage ./patches/iosevka { inherit (super) iosevka; };
   any-nix-shell = self.callPackage ./patches/any-nix-shell { inherit (super) any-nix-shell; };
 }
+
+## Include the rust overlay
+// (import ./rust self super)

infra/libkookie/shells/README.md

@@ -0,0 +1,29 @@
+# nix builders
+
+To make development on NixOS slightly less excruciating, libkookie
+ships with a set of development shells.  These are environments that
+can be included a by projects to provide the basic set of tools
+required by a language or development framework.
+
+libkookie itself then provides the `<shells>` key in the NIX_PATH,
+which means that existing shells can easily be included and layered by
+other `shell.nix` files.
+
+
+## How to use
+
+Create a `shell.nix` for a project that you want to include.  The tool
+`msh` (Make SHell) is available to generate these based on common
+defaults.  Afterwards both `lorri` and `nix-shell` will be able to
+pick up the required environment for development.
+
+```nix
+{...}: import <shells/rust> {}
+```
+
+The above snippet includes the basic Rust development toolchain.  You
+can also provide a set of additional packages to install
+
+```nix
+{ pkgs, ... }: import <shells/rust/stable> { packages = [ pkgs.hello ]; }
+```

infra/libkookie/shells/base.nix

@@ -0,0 +1,6 @@
+name: mkBuildInputs: { userPackages }:
+with import <nixpkgs> {};
+stdenv.mkDerivation {
+  inherit name;
+  buildInputs = (mkBuildInputs pkgs) ++ (userPackages pkgs);
+}

infra/libkookie/shells/elixir/default.nix

@@ -0,0 +1 @@
+import <shells/base.nix> "elixir-dev" (pkgs: with pkgs; [ elixir ])

infra/libkookie/shells/raku/default.nix

@@ -0,0 +1,4 @@
+import <shells/base.nix> "raku-devel" (pkgs: with pkgs; [
+  rakudo
+  zef
+])

infra/libkookie/shells/rust/nightly/default.nix

@@ -0,0 +1,8 @@
+import <shells/base.nix> "rust-nightly" (pkgs: with pkgs; [
+  # Use latest nightly from overlay which has a complete toolchain
+  (rust-bin.selectLatestNightlyWith (toolchain: toolchain.default))
+
+  cargo-watch
+  clangStdenv
+  rust-analyzer
+])

infra/libkookie/shells/rust/stable/default.nix

@@ -0,0 +1,7 @@
+import <shells/base.nix> "rust-stable" (pkgs: with pkgs; [
+  rust-bin.stable.latest.default # Use latest stable from overlay
+  
+  cargo-watch
+  clangStdenv
+  rust-analyzer
+])

nix/README.md

@@ -1,19 +0,0 @@
-# nix builders
-
-The kookienomicon is a collection of projects, each with their own
-dependencies, and build setups.  Nix and Lorri are used extentsively
-to facilitate switching between build tools and dependency scopes.
-
-The root of the repository adds a new key to the `NIX_PATH`
-environment variable, which can then be used to look-up development
-builders.
-
-
-## How to use
-
-There are default builders for common programming language setups
-(such as Rust).
-
-```nix
-
-```

nix/default.nix

@@ -1,10 +0,0 @@
-/** 
- * Kookienomicon overlay definition 
- *
- * 
- *
- */
-
-self: super: {
-  
-}

nix/raku.nix

@@ -1,6 +0,0 @@
-with import <nixpkgs> {};
-
-stdenv.mkDerivation {
-  name = "raku-dev";
-  buildInputs = with pkgs; [ rakudo zef ];
-}

nix/rust.nix

@@ -1,11 +0,0 @@
-with import <nixpkgs> {};
-
-stdenv.mkDerivation {
-  name = "rust-devel";
-  buildInputs = with pkgs; [
-    rust-analyzer rustc
-    cargo-watch
-    clangStdenv
-    hello
-  ];
-}