feat: Add agent-rs binaries (dfinity#1630)

This adds agent-rs package to nix, and icx and icx-proxy to nix-shell.

dfx.nix

@@ -71,6 +71,7 @@ let
         pkgs.mkCompositeShell {
           name = "dfinity-sdk-rust-env";
           nativeBuildInputs = [
+            pkgs.agent-rs # for icx and icx-proxy
             pkgs.rls
             # wabt-sys needs file in path, as well as cc (for cmake).
             pkgs.file

nix/default.nix

@@ -39,6 +39,13 @@ let
           in
             {
               motoko = import self.sources.motoko { inherit (self) system; };
+              agent-rs = self.naersk.buildPackage {
+                name = "agent-rs";
+                root = self.sources.agent-rs;
+                cargoBuildOptions = x: x ++ [ "-p" "icx" "-p" "icx-proxy" ];
+                cargoTestOptions = x: x ++ [ "-p" "icx" "-p" "icx-proxy" ];
+                buildInputs = [ self.openssl self.pkg-config ] ++ self.lib.optional self.stdenv.isDarwin pkgs.libiconv;
+              };
               dfinity = (import self.sources.dfinity { inherit (self) system; }).dfinity.rs;
               napalm = self.callPackage self.sources.napalm {
                 pkgs = self // { nodejs = self.nodejs-12_x; };

nix/sources.json

@@ -12,6 +12,12 @@
         "url": "https://github.com/RustSec/advisory-db/archive/bd8a0f67004bbe3c65153820076d56d3ca5fb7f0.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
+    "agent-rs": {
+        "branch": "ericswanson/build-on-rust-1.45.2-for-sdk-under-nix",
+        "repo": "https://github.com/dfinity/agent-rs",
+        "rev": "e6bf42ed697db37a252f019563c36160f72d8cd8",
+        "type": "git"
+    },
     "bats-support": {
         "branch": "v0.3.0",
         "builtin": false,
@@ -28,7 +34,7 @@
     "common": {
         "branch": "master",
         "repo": "ssh://[email protected]/dfinity-lab/common",
-        "rev": "ed5e16c4aa775ab21383b36c1b6d634ef15f087a",
+        "rev": "9960cc13ad2e8bcf1af5ea820fc50a2456ccc1db",
         "type": "git"
     },
     "dfinity": {