fix: fix nim interop env setup file

Author: AkMo3

tests/interop/nim_libp2p/nim_echo_server.nim

@@ -1,108 +1,62 @@
-{.used.}
-
-import chronos
-import stew/byteutils
-import libp2p
-
-##
-# Simple Echo Protocol Implementation for py-libp2p Interop Testing
-##
-const EchoCodec = "/echo/1.0.0"
-
-type EchoProto = ref object of LPProtocol
-
-proc new(T: typedesc[EchoProto]): T =
-  proc handle(conn: Connection, proto: string) {.async: (raises: [CancelledError]).} =
-    try:
-      echo "Echo server: Received connection from ", conn.peerId
-
-      # Read and echo messages in a loop
-      while not conn.atEof:
-        try:
-          # Read length-prefixed message using nim-libp2p's readLp
-          let message = await conn.readLp(1024 * 1024) # Max 1MB
-          if message.len == 0:
-            echo "Echo server: Empty message, closing connection"
-            break
-
-          let messageStr = string.fromBytes(message)
-          echo "Echo server: Received (", message.len, " bytes): ", messageStr
-
-          # Echo back using writeLp
-          await conn.writeLp(message)
-          echo "Echo server: Echoed message back"
-
-        except CatchableError as e:
-          echo "Echo server: Error processing message: ", e.msg
-          break
-
-    except CancelledError as e:
-      echo "Echo server: Connection cancelled"
-      raise e
-    except CatchableError as e:
-      echo "Echo server: Exception in handler: ", e.msg
-    finally:
-      echo "Echo server: Connection closed"
-      await conn.close()
-
-  return T.new(codecs = @[EchoCodec], handler = handle)
-
-##
-# Create QUIC-enabled switch
-##
-proc createSwitch(ma: MultiAddress, rng: ref HmacDrbgContext): Switch =
-  var switch = SwitchBuilder
-    .new()
-    .withRng(rng)
-    .withAddress(ma)
-    .withQuicTransport()
-    .build()
-  result = switch
-
-##
-# Main server
-##
-proc main() {.async.} =
-  let
-    rng = newRng()
-    localAddr = MultiAddress.init("/ip4/0.0.0.0/udp/0/quic-v1").tryGet()
-    echoProto = EchoProto.new()
-
-  echo "=== Nim Echo Server for py-libp2p Interop ==="
-
-  # Create switch
-  let switch = createSwitch(localAddr, rng)
-  switch.mount(echoProto)
-
-  # Start server
-  await switch.start()
-
-  # Print connection info
-  echo "Peer ID: ", $switch.peerInfo.peerId
-  echo "Listening on:"
-  for addr in switch.peerInfo.addrs:
-    echo "  ", $addr, "/p2p/", $switch.peerInfo.peerId
-  echo "Protocol: ", EchoCodec
-  echo "Ready for py-libp2p connections!"
-  echo ""
-
-  # Keep running
-  try:
-    await sleepAsync(100.hours)
-  except CancelledError:
-    echo "Shutting down..."
-  finally:
-    await switch.stop()
-
-# Graceful shutdown handler
-proc signalHandler() {.noconv.} =
-  echo "\nShutdown signal received"
-  quit(0)
-
-when isMainModule:
-  setControlCHook(signalHandler)
-  try:
-    waitFor(main())
-  except CatchableError as e:
-    echo "Error: ", e.msg
-    quit(1)
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_DIR="${SCRIPT_DIR}/.."
+
+# Colors
+GREEN='\033[0;32m'
+RED='\033[0;31m'
+NC='\033[0m'
+
+log_info() { echo -e "${GREEN}[INFO]${NC} $1"; }
+log_error() { echo -e "${RED}[ERROR]${NC} $1"; }
+
+main() {
+    log_info "Setting up nim echo server for interop testing..."
+
+    # Check if nim is available
+    if ! command -v nim &> /dev/null || ! command -v nimble &> /dev/null; then
+        log_error "Nim not found. Please install nim first."
+        exit 1
+    fi
+
+    cd "${PROJECT_DIR}"
+
+    # Create logs directory
+    mkdir -p logs
+
+    # Check if binary already exists
+    if [[ -f "nim_echo_server" ]]; then
+        log_info "nim_echo_server already exists, skipping build"
+        return 0
+    fi
+
+    log_info "Installing nim-libp2p globally..."
+    # Install libp2p globally so nim can find it
+    nimble install -y libp2p
+
+    log_info "Building nim echo server..."
+    # Compile the echo server
+    nim c \
+        -d:release \
+        -d:chronicles_log_level=INFO \
+        --opt:speed \
+        -d:libp2p_quic_support \
+        -d:ssl \
+        --mm:orc \
+        -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"
+    else
+        log_error "❌ Failed to build nim_echo_server"
+        exit 1
+    fi
+
+    log_info "🎉 Setup complete!"
+}
+
+main "$@"