Add copilot-api package and service

- Package copilot-api (GitHub Copilot API proxy) using bun
- Create systemd service module for copilot-api
- Enable service on ganymede listening on localhost:4141
- Add SSH port forwarding from mercury to ganymede for copilot-api
- Update gitignore to exclude Claude Code artifacts

Co-Authored-By: Claude (claude-sonnet-4.5) <noreply@anthropic.com>

1 files changed, 93 insertions, 0 deletions

diff --git a/pkgs/copilot-api/default.nix b/pkgs/copilot-api/default.nix
new file mode 100644
index 0000000..a66fe1a
--- /dev/null
+++ b/pkgs/copilot-api/default.nix
@@ -0,0 +1,93 @@
+{
+  pkgs,
+  lib,
+  ...
+}: let
+  inherit (pkgs) stdenv bun makeBinaryWrapper fetchFromGitHub;
+
+  node_modules = stdenv.mkDerivation {
+    pname = "copilot-api-node_modules";
+    version = "0.7.0";
+
+    src = fetchFromGitHub {
+      owner = "ericc-ch";
+      repo = "copilot-api";
+      tag = "v0.7.0";
+      hash = "sha256-rUUqf9QalVZDN3aw9ze5Uh+y5xvH6zdSgGN6ZLDjkDQ=";
+    };
+
+    nativeBuildInputs = [bun];
+
+    impureEnvVars = lib.fetchers.proxyImpureEnvVars;
+    dontPatchShebangs = true;
+
+    patchPhase = ''
+      # Remove prepare script that tries to setup git hooks
+      sed -i '/"prepare":/d' package.json
+    '';
+
+    buildPhase = ''
+      runHook preBuild
+      export HOME=$TMPDIR
+      bun install --no-progress --frozen-lockfile
+      runHook postBuild
+    '';
+
+    installPhase = ''
+      runHook preInstall
+      mkdir -p $out
+      cp -R ./node_modules $out
+      runHook postInstall
+    '';
+
+    outputHash = "sha256-+AH8eRG3SwwU86Pa/hFSW5nWD0v1po6z7xoLKUzq3qY=";
+    outputHashAlgo = "sha256";
+    outputHashMode = "recursive";
+  };
+in
+  stdenv.mkDerivation {
+    pname = "copilot-api";
+    version = "0.7.0";
+
+    src = fetchFromGitHub {
+      owner = "ericc-ch";
+      repo = "copilot-api";
+      tag = "v0.7.0";
+      hash = "sha256-rUUqf9QalVZDN3aw9ze5Uh+y5xvH6zdSgGN6ZLDjkDQ=";
+    };
+
+    nativeBuildInputs = [makeBinaryWrapper];
+    buildInputs = [bun pkgs.nodejs];
+
+    configurePhase = ''
+      runHook preConfigure
+      # Don't copy node_modules - let bun install them fresh
+      runHook postConfigure
+    '';
+
+    buildPhase = ''
+      runHook preBuild
+      export HOME=$TMPDIR
+      # Use the cached node_modules
+      cp -R ${node_modules}/node_modules .
+      chmod -R +w node_modules
+      # Try using bun's native build with correct entry point
+      mkdir -p dist
+      ${bun}/bin/bun build src/main.ts --outdir dist --target bun --format esm --sourcemap
+      runHook postBuild
+    '';
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p $out/lib/copilot-api
+      cp -r dist node_modules package.json $out/lib/copilot-api/
+
+      mkdir -p $out/bin
+      makeWrapper ${bun}/bin/bun $out/bin/copilot-api \
+        --prefix PATH : ${lib.makeBinPath [bun]} \
+        --add-flags "$out/lib/copilot-api/dist/main.js"
+
+      runHook postInstall
+    '';
+  }