Use tempfile crate to create tempfile

Removes dependency on nix
Adds dependency on tempfile

Fixes build failure on MacOS due to absence of `O_TMPFILE`

Fixes kevincox#7

Cargo.toml

@@ -12,7 +12,6 @@ futures-cpupool = "0.1"
 hyper = "0.11"
 lazy_static = "1.0.0"
 lru-cache = "0.1.1"
-nix = "0.9"
 os_pipe = "0.6"
 percent-encoding = "1.0"
 pnet = "0.21.0"
@@ -22,6 +21,7 @@ serde-xml-rs = "0.2"
 serde_derive = "1.0"
 serde_json = "1.0"
 smallvec = "0.6.2"
+tempfile = "^3.0"
 tokio-core = "0.1"
 tokio-file-unix = "0.4"
 tokio-io = "0.1"

src/error.rs

@@ -17,7 +17,6 @@ error_chain!{
 		Io(::std::io::Error);
 		Json(::serde_json::Error);
 		KXml(::xml::Error);
-		Nix(::nix::Error);
 		Utf8Error(::std::str::Utf8Error);
 		Xml(::serde_xml_rs::Error);
 	}

src/ffmpeg.rs

@@ -1,13 +1,12 @@
 use futures;
 use futures::stream::Stream;
-use nix;
 use os_pipe::IntoStdio;
 use os_pipe;
 use serde_json;
 use std;
 use std::io::{Write};
 use std::os::unix::fs::FileExt;
-use std::os::unix::io::FromRawFd;
+use tempfile;
 
 use error::ResultExt;
 
@@ -345,12 +344,8 @@ impl futures::Stream for MediaStream {
 
 pub fn transcode(source: &Format, target: &Format, input: Input, exec: &::Executors)
 	-> ::Result<std::sync::Arc<::Media>> {
-	let fd = nix::fcntl::open(
-		"/tmp",
-		{ use nix::fcntl::*; O_APPEND | O_CLOEXEC | O_TMPFILE | O_RDWR },
-		{ use nix::sys::stat::*; S_IRUSR | S_IWUSR })?;
-	let file = unsafe { std::fs::File::from_raw_fd(fd) };
-
+	let file = tempfile::tempfile().expect("Error opening tempfile");
+
 	let mut cmd = start_ffmpeg();
 	// cmd.stderr(std::process::Stdio::null());
 	add_input(input, exec, &mut cmd)?;

src/lib.rs

@@ -7,7 +7,6 @@ extern crate futures_cpupool;
 #[macro_use] extern crate hyper;
 #[macro_use] extern crate lazy_static;
 extern crate lru_cache;
-extern crate nix;
 extern crate os_pipe;
 extern crate percent_encoding;
 extern crate regex;
@@ -16,6 +15,7 @@ extern crate serde;
 extern crate serde_json;
 extern crate serde_xml_rs;
 extern crate smallvec;
+extern crate tempfile;
 extern crate tokio_core;
 extern crate tokio_file_unix;
 extern crate tokio_io;