fix cross compilation with cross

Cargo.lock

@@ -2073,7 +2073,7 @@ dependencies = [
 
 [[package]]
 name = "nebula-ffi"
-version = "0.1.1"
+version = "0.1.2"
 dependencies = [
  "bindgen",
  "gobuild",

Cross.toml

@@ -0,0 +1,18 @@
+# Cross config
+[target.aarch64-unknown-linux-musl]
+pre-build = [
+    "apt-get update && apt-get install --assume-yes wget && wget https://go.dev/dl/go1.20.5.linux-amd64.tar.gz -O /go.tar.gz && tar -C /usr/local -xzf /go.tar.gz && echo \"export PATH=$PATH:/usr/local/go/bin\" >> /etc/profile && touch /go-installed",
+]
+
+[target.aarch64-unknown-linux-musl.env]
+volumes = []
+passthrough = ["GOPATH=/tmp/gopath", "GOCACHE=/tmp/gocache"]
+
+[target.x86_64-unknown-linux-musl]
+pre-build = [
+    "apt-get update && apt-get install --assume-yes wget && wget https://go.dev/dl/go1.20.5.linux-amd64.tar.gz -O /go.tar.gz && tar -C /usr/local -xzf /go.tar.gz && echo \"export PATH=$PATH:/usr/local/go/bin\" >> /etc/profile && touch /go-installed",
+]
+
+[target.x86_64-unknown-linux-musl]
+volumes = []
+passthrough = ["GOPATH=/tmp/gopath", "GOCACHE=/tmp/gocache"]

nebula-ffi/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "nebula-ffi"
-version = "0.1.1"
+version = "0.1.3"
 edition = "2021"
 description = "A Rust wrapper crate for communicating with Nebula via a CGO FFI."
 license = "GPL-3.0-or-later"

nebula-ffi/build.rs

@@ -1,9 +1,20 @@
 use std::env;
 use std::path::PathBuf;
 use bindgen::CargoCallbacks;
+use std::path::Path;
 
 fn main() {
-    gobuild::Build::new().file("main.go").compile("nebulaffi");
+    // Find compiler: if /usr/local/go/bin/go exists, use that
+    // otherwise, rely on PATH
+    let compiler;
+    if Path::new("/usr/local/go/bin/go").exists() {
+        println!("Using /usr/local/go/bin/go");
+        compiler = "/usr/local/go/bin/go";
+    } else {
+        compiler = "go";
+    }
+
+    gobuild::Build::new().compiler(compiler).file("main.go").compile("nebulaffi");
 
     let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
 
@@ -13,6 +24,8 @@ fn main() {
     println!("cargo:rerun-if-changed=go.sum");
     println!("cargo:rerun-if-changed=main.go");
 
+    println!("Bindgen start");
+
     let bindings = bindgen::Builder::default()
         .header(out_path.join("libnebulaffi.h").display().to_string())
         .parse_callbacks(Box::new(CargoCallbacks))

tfclient/Cargo.toml

@@ -49,10 +49,3 @@ license-file = "LICENSE.txt"
 maintainer-scripts = "debian/"
 systemd-units = { enable = false, unit-name = "tfclient@" }
 
-# Cross config
-[target.aarch64-unknown-linux-musl]
-pre-build = [
-    "wget https://go.dev/dl/go1.20.5.linux-arm64.tar.gz -O /go.tar.gz",
-    "tar -C /usr/local -xzf /go.tar.gz",
-    "echo \"export PATH=$PATH:/usr/local/go/bin\" >> /etc/profile"
-]