chore: update to build with rust 1.80 (#134)

build.rs

@@ -38,7 +38,7 @@ fn commit_info() -> String {
 fn commit_hash() -> Result<String, Ignore> {
     Ok(String::from_utf8(
         Command::new("git")
-            .args(&["rev-parse", "--short=9", "HEAD"])
+            .args(["rev-parse", "--short=9", "HEAD"])
             .output()?
             .stdout,
     )?)
@@ -47,7 +47,7 @@ fn commit_hash() -> Result<String, Ignore> {
 fn commit_date() -> Result<String, Ignore> {
     Ok(String::from_utf8(
         Command::new("git")
-            .args(&["log", "-1", "--date=short", "--pretty=format:%cd"])
+            .args(["log", "-1", "--date=short", "--pretty=format:%cd"])
             .output()?
             .stdout,
     )?)

src/download/src/lib.rs

@@ -45,10 +45,10 @@ pub fn download_to_path_with_backend(
 
     || -> Result<()> {
         let file = OpenOptions::new()
-                    .write(true)
-                    .create(true)
-                    .open(&path)
-                    .chain_err(|| "error creating file for download")?;
+            .write(true)
+            .create(true)
+            .open(&path)
+            .chain_err(|| "error creating file for download")?;
 
         let file = RefCell::new(file);
 
@@ -93,10 +93,7 @@ pub mod curl {
 
     thread_local!(pub static EASY: RefCell<Easy> = RefCell::new(Easy::new()));
 
-    pub fn download(
-        url: &Url,
-        callback: &dyn Fn(Event) -> Result<()>,
-    ) -> Result<()> {
+    pub fn download(url: &Url, callback: &dyn Fn(Event) -> Result<()>) -> Result<()> {
         // Fetch either a cached libcurl handle (which will preserve open
         // connections) or create a new one if it isn't listed.
         //

src/elan-cli/common.rs

@@ -26,7 +26,7 @@ pub fn confirm(question: &str, default: bool) -> Result<bool> {
         _ => false,
     };
 
-    println!("");
+    println!();
 
     Ok(r)
 }
@@ -38,7 +38,7 @@ pub enum Confirm {
 }
 
 pub fn confirm_advanced() -> Result<Confirm> {
-    println!("");
+    println!();
     println!("1) Proceed with installation (default)");
     println!("2) Customize installation");
     println!("3) Cancel installation");
@@ -52,7 +52,7 @@ pub fn confirm_advanced() -> Result<Confirm> {
         _ => Confirm::No,
     };
 
-    println!("");
+    println!();
 
     Ok(r)
 }
@@ -62,7 +62,7 @@ pub fn question_str(question: &str, default: &str) -> Result<String> {
     let _ = std::io::stdout().flush();
     let input = read_line()?;
 
-    println!("");
+    println!();
 
     if input.is_empty() {
         Ok(default.to_string())
@@ -77,7 +77,7 @@ pub fn question_bool(question: &str, default: bool) -> Result<bool> {
     let _ = std::io::stdout().flush();
     let input = read_line()?;
 
-    println!("");
+    println!();
 
     if input.is_empty() {
         Ok(default)
@@ -130,11 +130,8 @@ pub fn set_globals(verbose: bool) -> Result<Cfg> {
     }))?)
 }
 
-pub fn show_channel_update(
-    cfg: &Cfg,
-    desc: &ToolchainDesc,
-) -> Result<()> {
-    let ref toolchain = cfg.get_toolchain(&desc, false).expect("");
+pub fn show_channel_update(cfg: &Cfg, desc: &ToolchainDesc) -> Result<()> {
+    let toolchain = &cfg.get_toolchain(desc, false).expect("");
     let version = lean_version(toolchain);
     let name = desc.to_string();
 
@@ -151,7 +148,7 @@ pub fn show_channel_update(
     let _ = write!(t, "{}", banner);
     let _ = t.reset();
     let _ = writeln!(t, " - {}", version);
-    let _ = writeln!(t, "");
+    let _ = writeln!(t);
 
     Ok(())
 }
@@ -226,7 +223,7 @@ pub fn list_overrides(cfg: &Cfg) -> Result<()> {
             )
         }
         if any_not_exist {
-            println!("");
+            println!();
             info!(
                 "you may remove overrides for non-existent directories with
 `elan override unset --nonexistent`"
@@ -253,10 +250,9 @@ pub fn report_error(e: &Error) {
     if show_backtrace() {
         if let Some(backtrace) = e.backtrace() {
             info!("backtrace:");
-            println!("");
+            println!();
             println!("{:?}", backtrace);
         }
-    } else {
     }
 
     fn show_backtrace() -> bool {

src/elan-cli/download_tracker.rs

@@ -110,7 +110,7 @@ impl DownloadTracker {
         if self.displayed_charcount.is_some() {
             // Display the finished state
             self.display();
-            let _ = writeln!(self.term.as_mut().unwrap(), "");
+            let _ = writeln!(self.term.as_mut().unwrap());
         }
         self.prepare_for_new_download();
     }
@@ -159,19 +159,11 @@ impl DownloadTracker {
                 let eta_h = HumanReadable(remaining / speed);
                 format!(
                     "{} / {} ({:3.0} %) {}/s ETA: {:#}",
-                    total_h,
-                    content_len_h,
-                    percent,
-                    speed_h,
-                    eta_h
+                    total_h, content_len_h, percent, speed_h, eta_h
                 )
             }
             None => {
-                format!(
-                    "Total: {} Speed: {}/s",
-                    total_h,
-                    speed_h
-                )
+                format!("Total: {} Speed: {}/s", total_h, speed_h)
             }
         };