add Licence information

Sometimes config options get silenty removed because they have
dependencies on other options that haven't been enabled. If you add
those as attributes here, the kernel build will check they're _still_
present in the config after make oldconfig has run.

CONTRIBUTING.md

@@ -0,0 +1,16 @@
+# Contributing
+
+[ This is a placeholder, because it's early days and the volume of contributions thus far can be counted in an eggcup ]
+
+* Contributions are very welcome
+
+* Please open an issue (or otherwise establish some kind of dialogue) before you send a PR I haven't asked for.
+Just so I know it's expected and you're not wasting time doing something I won't accept or have already started on
+
+* The Nix code in Liminix is MIT-licenced (same as Nixpkgs), but the code it combines from other places (e.g. Linux, OpenWRT) may
+have a variety of licences.  I have no intention of asking for copyright assignment: just like when submitting to the
+Linux kernel you retain the copyright on the code you contribute.
+
+* Please govern yourself in Liminix project venues according to the guidance in the [geekfeminism "Community Anti-harassment Policy"](https://geekfeminism.wikia.org/wiki/Community_anti-harassment/Policy).
+
+* If you've read the preceding bullets and don't find anything to disagree with, open a PR

LICENSE

@@ -0,0 +1,24 @@
+This is the MIT License. It applies to all original Nix code in
+Liminix, and the code which was copied from NixWRT.  Content from
+other projects (e.g the Linux kernel project, OpenWrt) is included.
+under the terms of the licences of those projects.
+
+Copyright (c) 2018-2022 Daniel Barlow and contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -125,6 +125,20 @@ filesystem, and you can run `nix-store --query` on it:
     nix-store -q --tree manifest
 
 
+## Contributing
+
+Contributions are welcome, though in these early days there may be a
+bit of back and forth involved before patches are merged.  Have a read
+of [CONTRIBUTING](CONTRIBUTING.md) and [STYLE](STYLE.md) and try to
+intuit the unarticulated vision :-)
+
+Liminix' primary repo is https://gti.telent.net/dan/liminix. There's a
+[mirror on Github](https://github.com/telent/liminix) for convenience
+and visibility: you can open PRs against that but be aware that the
+process of merging them may be arcane. Some day, we will have
+federated Gitea using ActivityPub.
+
+
 ## Articles of interest
 
 * [Build Safety of Software in 28 Popular Home Routers](https://cyber-itl.org/assets/papers/2018/build_safety_of_software_in_28_popular_home_routers.pdf):

default.nix

@@ -14,7 +14,7 @@ let
   ] nixpkgs.pkgs;
   squashfs = liminix.builders.squashfs config.filesystem.contents;
   kernel = callPackage ./kernel {
-    inherit (config.kernel) config;
+    inherit (config.kernel) config checkedConfig;
   };
 in {
   outputs = {

devices/qemu.nix

@@ -231,10 +231,6 @@
       NET_ACT_PEDIT= "m";
       NET_ACT_SIMP= "m";
       NET_ACT_SKBEDIT= "m";
-      CFG80211= "m";
-      MAC80211= "m";
-      MAC80211_MESH= "y";
-      RFKILL= "m";
       DEVTMPFS= "y";
       CONNECTOR= "m";
       MTD= "y";
@@ -437,7 +433,12 @@
       RCU_CPU_STALL_TIMEOUT = "60";
       ENABLE_DEFAULT_TRACERS = "y";
 
-
+      CFG80211= "y";
+      MAC80211= "y";
+      MAC80211_MESH= "y";
+      RFKILL= "y";
+      WLAN = "y";
+      MAC80211_HWSIM = "y";
       SQUASHFS = "y";
       SQUASHFS_XZ = "y";
       VIRTIO_PCI = "y";

kernel/default.nix

@@ -5,6 +5,7 @@
 , fetchFromGitHub
 
 , config
+, checkedConfig
 }:
 let
   source = fetchFromGitHub {
@@ -36,7 +37,6 @@ let
 in
 {
   vmlinux = callPackage ./vmlinux.nix {
-    inherit tree;
-    inherit config;
+    inherit tree config checkedConfig;
   };
 }