Replace tempdir with tempfile (#84)

Tempdir has been deprecated for quite some time now

Author: Eijebong

Cargo.lock

@@ -20,7 +20,7 @@ rustc_version = "0.2"
 serde = "1.0"
 serde_derive = "1.0"
 serde_json = "1.0"
-tempdir = "0.3.5"
+tempfile = "3"
 toml = "0.5"
 walkdir = "2.3"
 

Cargo.toml

@@ -11,7 +11,7 @@ extern crate rustc_version;
 extern crate serde_json;
 #[macro_use]
 extern crate serde_derive;
-extern crate tempdir;
+extern crate tempfile;
 extern crate toml;
 extern crate walkdir;
 

src/lib.rs

@@ -8,7 +8,7 @@ use std::path::Path;
 use std::process::Command;
 
 use rustc_version::VersionMeta;
-use tempdir::TempDir;
+use tempfile::Builder;
 use toml::{value::Table, Value};
 
 use cargo;
@@ -64,7 +64,7 @@ fn build_crate(
     dst: &Path,
     verbose: bool,
 ) -> Result<()> {
-    let td = TempDir::new("cargo-xbuild").chain_err(|| "couldn't create a temporary directory")?;
+    let td = Builder::new().prefix("cargo-xbuild").tempdir().chain_err(|| "couldn't create a temporary directory")?;
     let td_path;
     let td = if env::var_os("XBUILD_KEEP_TEMP").is_some() {
         td_path = td.into_path();