fix: install rust toolchain via rustup (#82)

CentOS Stream 9 has removed rust 1.84 from its toolchain and our image
builds are failing to install the package. Because we are not building
upstream in an airtight environment, we can work around this by
installing rustup and installing the 1.84 toolchain with it.

Author: Molter73

.github/workflows/ci.yml

@@ -39,6 +39,9 @@ jobs:
         sudo apt-get install -y \
           libbpf-dev \
           protobuf-compiler
+
+        rustup component add clippy
+
     - shell: python
       id: args
       run: |
@@ -69,7 +72,10 @@ jobs:
       CLANG_FMT: clang-format-18
     steps:
     - uses: actions/checkout@v4
-    - run: make format-check
+    - name: Check code format
+      run: |
+        rustup component add rustfmt
+        make format-check
 
   vars:
     runs-on: ubuntu-24.04

Containerfile

@@ -4,9 +4,11 @@ RUN dnf install --enablerepo=crb -y \
         clang-19.1.7 \
         libbpf-devel \
         protobuf-compiler \
-        protobuf-devel \
-        cargo-1.84.1 \
-        rust-1.84.1
+        protobuf-devel && \
+        curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | \
+            sh -s -- -y --default-toolchain 1.84 --profile minimal
+
+ENV PATH=/root/.cargo/bin:${PATH}
 
 WORKDIR /app
 

rust-toolchain.toml

@@ -1,3 +1,2 @@
 [toolchain]
 channel = "1.84"
-components = ["rustfmt", "rust-analyzer", "clippy"]