feat(emacs): Add telega.el support r/199

Packages the telega-server binary and adds the required mode into
Emacs.

Unread message count is displayed in the modeline, which is neat.

Probably need to figure out some key bindings for this.

2 files changed, 23 insertions, 0 deletions

diff --git a/third_party/default.nix b/third_party/default.nix
index 1837cf26ca..890b177762 100644
--- a/third_party/default.nix
+++ b/third_party/default.nix
@@ -69,6 +69,7 @@ let
       stdenv
       stern
       symlinkJoin
+      tdlib
       terraform_0_12
       thttpd
       tree
diff --git a/third_party/telega/default.nix b/third_party/telega/default.nix
new file mode 100644
index 0000000000..4fdf0667ff
--- /dev/null
+++ b/third_party/telega/default.nix
@@ -0,0 +1,22 @@
+# Telega is an Emacs client for Telegram. It requires a native server
+# component to run correctly, which is built by this derivation.
+{ pkgs, ... }:
+
+with pkgs.third_party;
+
+stdenv.mkDerivation {
+  name = "telega";
+  buildInputs = [ tdlib ];
+
+  src = fetchFromGitHub {
+    owner = "zevlg";
+    repo = "telega.el";
+    rev = "d532b16067cf24728a2aa03a7aeaebe2ceac7df4";
+    sha256 = "1s2sd07sin9sy833wqprhbfk5j1d1s4azzvj6d8k68sxlgz8996m";
+  } + "/server";
+
+  installPhase = ''
+    mkdir -p $out/bin
+    mv telega-server $out/bin/
+  '';
+}