use libgit2 to track PRs (#10)v0.2.0

* nix: don't depend on registry for nixpkgs input

* use libgit2 to track PRs

* nix: don't use ci devShell as defaul

* crates: bump serenity from `9ad74d4` to `0.12.2

* nix: fix cross compiled builds

* crates: split more from client

* bot-jobs: update remote refs more efficiently

* git-tracker: account for HEAD commits

* bot-config: use nixpkgs branches from environment

* bot-commands: don't display branches prs haven't landed in

* git-tracker: return false when commits aren't found

this is annoying as a hard error since it turns out github will report
garbage merge commit SHAs for PRs that *haven't* been merged yet. yay

* bot: improve docs in some places

* bot-client: display invite link on start

* bot-http: add TeawieClientExt

* bot-commands: add /about

* docs: update readme todos

* nix: enable StateDirectory in module

* crates: bump to 0.2.0

1 files changed, 7 insertions, 5 deletions

diff --git a/nix/package.nix b/nix/package.nix
index 2802233..778fa27 100644
--- a/nix/package.nix
+++ b/nix/package.nix
@@ -1,6 +1,8 @@
 {
   lib,
   rustPlatform,
+  openssl,
+  pkg-config,
   version,
   lto ? true,
   optimizeSize ? false,
@@ -12,16 +14,16 @@ rustPlatform.buildRustPackage {
   src = lib.fileset.toSource {
     root = ../.;
     fileset = lib.fileset.unions [
-      ../src
+      (lib.fileset.gitTracked ../crates)
       ../Cargo.toml
       ../Cargo.lock
     ];
   };
 
-  cargoLock = {
-    lockFile = ../Cargo.lock;
-    allowBuiltinFetchGit = true;
-  };
+  cargoLock.lockFile = ../Cargo.lock;
+
+  nativeBuildInputs = [pkg-config];
+  buildInputs = [openssl];
 
   env = let
     toRustFlags = lib.mapAttrs' (