From fb8bdfd7da7b23770ad18b0cf3de3d679c7506c7 Mon Sep 17 00:00:00 2001
From: r-vdp <ramses@well-founded.dev>
Date: Wed, 26 Jun 2024 19:12:54 +0200
Subject: [PATCH] Adapt to https://github.com/Holo-Host/holo-nixpkgs/pull/2150

---
 .github/workflows/build-hds.yaml | 25 +++++++++++++++++++++++++
 flake.nix                        | 26 +++++++++++++++++++++++++-
 2 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/build-hds.yaml b/.github/workflows/build-hds.yaml
index f505acc..4ef379a 100644
--- a/.github/workflows/build-hds.yaml
+++ b/.github/workflows/build-hds.yaml
@@ -13,6 +13,8 @@ jobs:
     runs-on: ${{ matrix.build-config.runner }}
     outputs:
       nixpkgs-revision: ${{ steps.nixpkgs-revision.outputs.nixpkgs-revision }}
+      rust-overlay-revision: ${{ steps.rust-overlay-revision.outputs.rust-overlay-revision }}
+      rust-version: ${{ steps.rust-version.outputs.rust-version }}
       build-deps: ${{ steps.build-deps.outputs.build-deps }}
     strategy:
       matrix:
@@ -67,6 +69,16 @@ jobs:
         run: |
           echo "nixpkgs-revision=$(nix eval --raw '.#legacyPackages.${{ matrix.build-config.system }}.holo-dev-server-bin.nixpkgs-revision')" >> ${GITHUB_OUTPUT}
 
+      - name: get rust-overlay revision
+        id: rust-overlay-revision
+        run: |
+          echo "rust-overlay-revision=$(nix eval --raw '.#legacyPackages.${{ matrix.build-config.system }}.holo-dev-server-bin.rust-overlay-revision')" >> ${GITHUB_OUTPUT}
+
+      - name: get rust version
+        id: rust-version
+        run: |
+          echo "rust-version=$(nix eval --raw '.#legacyPackages.${{ matrix.build-config.system }}.holo-dev-server-bin.rust-version')" >> ${GITHUB_OUTPUT}
+
       - name: get build deps
         id: build-deps
         run: |
@@ -160,6 +172,12 @@ jobs:
           tar -xzf <(curl --location https://github.com/nixos/nixpkgs/archive/${{ needs.build.outputs.nixpkgs-revision }}.tar.gz)
           echo "hash=$(nix hash path --base32 nixpkgs-${{ needs.build.outputs.nixpkgs-revision }}/)" >> ${GITHUB_OUTPUT}
 
+      - name: prefetch rust-overlay
+        id: prefetch-rust-overlay
+        run: |
+          tar -xzf <(curl --location https://github.com/oxalica/rust-overlay/archive/${{ needs.build.outputs.rust-overlay-revision }}.tar.gz)
+          echo "hash=$(nix hash path --base32 rust-overlay-${{ needs.build.outputs.rust-overlay-revision }}/)" >> ${GITHUB_OUTPUT}
+
       - name: prefetch x86_64-linux binary
         id: prefetch-x86_64-linux
         run: |
@@ -187,6 +205,13 @@ jobs:
               url = "https://github.com/nixos/nixpkgs/archive/${{ needs.build.outputs.nixpkgs-revision }}.tar.gz";
               sha256 = "${{ steps.prefetch-nixpkgs.outputs.hash }}";
             };
+
+            rust-overlay = builtins.fetchTarball {
+              url = "https://github.com/oxalica/rust-overlay/archive/${{ needs.build.outputs.rust-overlay-revision }}.tar.gz";
+              sha256 = "${{ steps.prefetch-rust-overlay.outputs.hash }}";
+            };
+            rust-version = "${{ needs.build.outputs.rust-version }}";
+
             x86_64-linux.holo-dev-server-bin = builtins.fetchTarball {
               url = "https://github.com/${{ github.repository }}/releases/download/${{ needs.upload-binary.outputs.release_name }}/holo-dev-server-x86_64-linux.tar.gz";
               sha256 = "${{ steps.prefetch-x86_64-linux.outputs.hash }}";
diff --git a/flake.nix b/flake.nix
index 94ff00d..e898cde 100644
--- a/flake.nix
+++ b/flake.nix
@@ -22,7 +22,31 @@
     {
       packages = forEachSystem (system:
         let
-          pkgs = import srcs.nixpkgs { inherit system; };
+          pkgs = import srcs.nixpkgs {
+            inherit system;
+            overlays = [
+              (import srcs.rust-overlay)
+              (final: prev: {
+                rust =
+                  let
+                    rustStable = final.rust-bin.stable.${srcs.rust-version}.default;
+                  in
+                  prev.rust // {
+                    packages = prev.rust.packages // {
+                      stable = {
+                        rustPlatform = final.makeRustPlatform {
+                          inherit (final.rust.packages.stable) rustc cargo;
+                        };
+
+                        inherit (final.rust.packages.stable.rustPlatform) rust;
+                        rustc = rustStable;
+                        cargo = rustStable;
+                      };
+                    };
+                  };
+              })
+            ];
+          };
           inherit (pkgs) lib;
         in
         {