♻️ refactor: move more Windows-only code behind cfg flags

src/ip.rs

@@ -6,57 +6,89 @@ use std::{
 
 use crate::AppError;
 
-pub fn get_ip_addr_output () -> Result <String, AppError> {
-	let output = Command::new ("ip")
-	.arg ("addr")
-	.output ()?;
-	let output = output.stdout.as_slice ();
-	let output = String::from_utf8 (output.to_vec ())?;
-	Ok (output)
-}
-
-pub fn parse_ip_addr_output (output: &str) -> Vec <Ipv4Addr> {
-	// I wrote this in FP style because I was bored.
+#[cfg(target_os = "linux")]
+pub mod linux {
+	use super::*;
 	
-	output.lines () 
-	.map (|l| l.trim_start ())
-	.filter_map (|l| l.strip_prefix ("inet "))
-	.filter_map (|l| l.find ('/').map (|x| &l [0..x]))
-	.filter_map (|l| Ipv4Addr::from_str (l).ok ())
-	.collect ()
-}
-
-pub fn get_ip_config_output () -> Result <String, AppError> {
-	let output = Command::new ("ipconfig")
-	.output ()?;
-	let output = output.stdout.as_slice ();
-	let output = String::from_utf8 (output.to_vec ())?;
-	Ok (output)
-}
-
-pub fn parse_ip_config_output (output: &str) -> Vec <Ipv4Addr> {
-	let mut addrs = vec! [];
-	
-	for line in output.lines () {
-		let line = line.trim_start ();
-		
-		// Maybe only works on English locales?
-		if ! line.starts_with ("IPv4 Address") {
-			continue;
-		}
-		let colon_pos = match line.find (':') {
-			None => continue,
-			Some (x) => x,
-		};
-		let line = &line [colon_pos + 2..];
-		
-		let addr = match Ipv4Addr::from_str (line) {
-			Err (_) => continue,
-			Ok (x) => x,
-		};
-		
-		addrs.push (addr);
+	pub fn get_ip_addr_output () -> Result <String, AppError> {
+		let output = Command::new ("ip")
+		.arg ("addr")
+		.output ()?;
+		let output = output.stdout.as_slice ();
+		let output = String::from_utf8 (output.to_vec ())?;
+		Ok (output)
+	}
+
+	pub fn parse_ip_addr_output (output: &str) -> Vec <Ipv4Addr> {
+		// I wrote this in FP style because I was bored.
+		
+		output.lines () 
+		.map (|l| l.trim_start ())
+		.filter_map (|l| l.strip_prefix ("inet "))
+		.filter_map (|l| l.find ('/').map (|x| &l [0..x]))
+		.filter_map (|l| Ipv4Addr::from_str (l).ok ())
+		.collect ()
+	}
+}
+
+#[cfg(target_os = "windows")]
+pub mod windows {
+	use super::*;
+	
+	pub fn get_ip_config_output () -> Result <String, AppError> {
+		let output = Command::new ("ipconfig")
+		.output ()?;
+		let output = output.stdout.as_slice ();
+		let output = String::from_utf8 (output.to_vec ())?;
+		Ok (output)
+	}
+
+	pub fn parse_ip_config_output (output: &str) -> Vec <Ipv4Addr> {
+		let mut addrs = vec! [];
+		
+		for line in output.lines () {
+			let line = line.trim_start ();
+			
+			// Maybe only works on English locales?
+			if ! line.starts_with ("IPv4 Address") {
+				continue;
+			}
+			let colon_pos = match line.find (':') {
+				None => continue,
+				Some (x) => x,
+			};
+			let line = &line [colon_pos + 2..];
+			
+			let addr = match Ipv4Addr::from_str (line) {
+				Err (_) => continue,
+				Ok (x) => x,
+			};
+			
+			addrs.push (addr);
+		}
+		
+		addrs
+	}
+
+	#[cfg (test)]
+	mod test {
+		use super::*;
+		
+		#[test]
+		fn test () {
+			for (input, expected) in [
+				(
+					r"
+	IPv4 Address .   .  .. . . . : 192.168.1.1
+	",
+					vec! [
+						Ipv4Addr::new (192, 168, 1, 1),
+					]
+				),
+			] {
+				let actual = parse_ip_config_output (input);
+				assert_eq! (actual, expected);
+			}
+		}
 	}
-	
-	addrs
 }

src/main.rs

@@ -111,9 +111,9 @@ async fn async_main () -> Result <(), AppError> {
 
 #[cfg(target_os = "linux")]
 fn my_ips () -> Result <(), AppError> {
-	let output = ip::get_ip_addr_output ()?;
+	let output = ip::linux::get_ip_addr_output ()?;
 	
-	for addr in ip::parse_ip_addr_output (&output)
+	for addr in ip::linux::parse_ip_addr_output (&output)
 	.iter ()
 	.filter (|a| ! a.is_loopback ())
 	{
@@ -131,9 +131,9 @@ fn my_ips () -> Result <(), AppError> {
 
 #[cfg(target_os = "windows")]
 fn my_ips () -> Result <(), AppError> {
-	let output = ip::get_ip_config_output ()?;
+	let output = ip::windows::get_ip_config_output ()?;
 	
-	for addr in ip::parse_ip_config_output (&output) {
+	for addr in ip::windows::parse_ip_config_output (&output) {
 		println! ("{:?}", addr);
 	}