fix: fix nim interop env setup file

Author: AkMo3

.github/workflows/tox.yml

@@ -36,9 +36,8 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python }}
-      - run: |
-          python -m pip install --upgrade pip
-          python -m pip install tox
+
+      # Add Nim installation for interop tests
       - name: Install Nim for interop testing
         if: matrix.toxenv == 'interop'
         run: |
@@ -47,12 +46,18 @@ jobs:
           echo "$HOME/.nimble/bin" >> $GITHUB_PATH
           echo "$HOME/.choosenim/toolchains/nim-stable/bin" >> $GITHUB_PATH
 
-      - name: Verify Nim installation
+      # Cache nimble packages - ADD THIS
+      - name: Cache nimble packages
         if: matrix.toxenv == 'interop'
-        run: |
-          export PATH="$HOME/.nimble/bin:$HOME/.choosenim/toolchains/nim-stable/bin:$PATH"
-          nim --version
-          nimble --version
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.nimble
+            ~/.choosenim/toolchains/*/lib
+          key: ${{ runner.os }}-nimble-${{ hashFiles('**/nim_echo_server.nim') }}
+          restore-keys: |
+            ${{ runner.os }}-nimble-
+
       - name: Build nim interop binaries
         if: matrix.toxenv == 'interop'
         run: |
@@ -61,6 +66,11 @@ jobs:
           ./scripts/setup_nim_echo.sh
 
       - run: |
+          python -m pip install --upgrade pip
+          python -m pip install tox
+
+      - name: Run Tests or Generate Docs
+        run: |
           if [[ "${{ matrix.toxenv }}" == 'docs' ]]; then
             export TOXENV=docs
           else

tests/interop/nim_libp2p/scripts/setup_nim_echo.sh

@@ -1,4 +1,6 @@
 #!/usr/bin/env bash
+# tests/interop/nim_libp2p/scripts/setup_nim_echo.sh
+# Cache-aware setup that skips installation if packages exist
 
 set -euo pipefail
 
@@ -8,9 +10,11 @@ PROJECT_DIR="${SCRIPT_DIR}/.."
 # Colors
 GREEN='\033[0;32m'
 RED='\033[0;31m'
+YELLOW='\033[1;33m'
 NC='\033[0m'
 
 log_info() { echo -e "${GREEN}[INFO]${NC} $1"; }
+log_warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
 log_error() { echo -e "${RED}[ERROR]${NC} $1"; }
 
 main() {
@@ -33,23 +37,32 @@ main() {
         return 0
     fi
 
-    log_info "Installing nim-libp2p globally..."
-    # Install libp2p globally so nim can find it
-    nimble install -y libp2p
+    # Check if libp2p is already installed (cache-aware)
+    if nimble list -i | grep -q "libp2p"; then
+        log_info "libp2p already installed, skipping installation"
+    else
+        log_info "Installing nim-libp2p globally..."
+        nimble install -y libp2p
+    fi
 
     log_info "Building nim echo server..."
     # Compile the echo server
     nim c \
         -d:release \
         -d:chronicles_log_level=INFO \
+        -d:libp2p_quic_support \
+        -d:chronos_event_loop=iocp \
+        -d:ssl \
         --opt:speed \
         --mm:orc \
+        --verbosity:1 \
         -o:nim_echo_server \
         nim_echo_server.nim
 
     # Verify binary was created
     if [[ -f "nim_echo_server" ]]; then
         log_info "✅ nim_echo_server built successfully"
+        log_info "Binary size: $(ls -lh nim_echo_server | awk '{print $5}')"
     else
         log_error "❌ Failed to build nim_echo_server"
         exit 1