Disable socket import on wasm

vm/Cargo.toml

@@ -24,7 +24,6 @@ sha2 = "0.8"
 sha3 = "0.8"
 blake2 = "0.8"
 
-gethostname = "0.2.0"
 num-complex = { version = "0.2", features = ["serde"] }
 num-bigint = { version = "0.2", features = ["serde"] }
 num-traits = "=0.2.6"
@@ -70,3 +69,6 @@ flamer = { version = "0.3", optional = true }
 
 [target.'cfg(all(unix, not(any(target_os = "android", target_os = "redox"))))'.dependencies]
 pwd = "1"
+
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+gethostname = "0.2.0"

vm/src/stdlib/mod.rs

@@ -17,6 +17,7 @@ mod platform;
 mod pystruct;
 mod random;
 mod re;
+#[cfg(not(target_arch = "wasm32"))]
 pub mod socket;
 mod string;
 #[cfg(feature = "rustpython-compiler")]

vm/src/stdlib/socket.rs

@@ -5,9 +5,8 @@ use std::io::Write;
 use std::net::{Ipv4Addr, SocketAddr, TcpListener, TcpStream, ToSocketAddrs, UdpSocket};
 
 #[cfg(unix)]
-use nix::unistd::{gethostname, sethostname};
+use nix::unistd::sethostname;
 
-#[cfg(windows)]
 use gethostname::gethostname;
 
 use byteorder::{BigEndian, ByteOrder};
@@ -382,16 +381,6 @@ fn get_addr_tuple(vm: &VirtualMachine, addr: SocketAddr) -> PyResult {
     Ok(vm.ctx.new_tuple(vec![ip, port]))
 }
 
-#[cfg(unix)]
-fn socket_gethostname(vm: &VirtualMachine) -> PyResult {
-    let mut buf = [0u8; 1024];
-    match gethostname(&mut buf) {
-        Ok(cstr) => Ok(vm.new_str(String::from(cstr.to_str().unwrap()))),
-        Err(e) => Err(convert_nix_error(vm, e)),
-    }
-}
-
-#[cfg(windows)]
 fn socket_gethostname(vm: &VirtualMachine) -> PyResult {
     gethostname()
         .into_string()