Merge pull request #970 from charlespierce/clippy_warnings

Clean up clippy warnings from new Rust version

crates/volta-core/src/tool/npm/fetch.rs

@@ -1,7 +1,7 @@
 //! Provides fetcher for npm distributions
 
 use std::fs::{write, File};
-use std::path::{Path, PathBuf};
+use std::path::Path;
 
 use super::super::download_tool_error;
 use super::super::registry::public_registry_package;
@@ -108,7 +108,7 @@ fn unpack_archive(archive: Box<dyn Archive>, version: &Version) -> Fallible<()>
 /// Return the archive if it is valid. It may have been corrupted or interrupted in the middle of
 /// downloading.
 /// ISSUE(#134) - verify checksum
-fn load_cached_distro(file: &PathBuf) -> Option<Box<dyn Archive>> {
+fn load_cached_distro(file: &Path) -> Option<Box<dyn Archive>> {
     if file.is_file() {
         let file = File::open(file).ok()?;
         Tarball::load(file).ok()

crates/volta-core/src/tool/yarn/fetch.rs

@@ -1,7 +1,7 @@
 //! Provides fetcher for Yarn distributions
 
 use std::fs::File;
-use std::path::{Path, PathBuf};
+use std::path::Path;
 
 use super::super::download_tool_error;
 use super::super::registry::{find_unpack_dir, public_registry_package};
@@ -101,7 +101,7 @@ fn unpack_archive(archive: Box<dyn Archive>, version: &Version) -> Fallible<()>
 /// Return the archive if it is valid. It may have been corrupted or interrupted in the middle of
 /// downloading.
 // ISSUE(#134) - verify checksum
-fn load_cached_distro(file: &PathBuf) -> Option<Box<dyn Archive>> {
+fn load_cached_distro(file: &Path) -> Option<Box<dyn Archive>> {
     if file.is_file() {
         let file = File::open(file).ok()?;
         Tarball::load(file).ok()

src/command/setup.rs

@@ -84,10 +84,8 @@ mod os {
     fn determine_profiles() -> Fallible<Vec<PathBuf>> {
         let home_dir = dirs::home_dir().ok_or(ErrorKind::NoHomeEnvironmentVar)?;
         let shell = env::var("SHELL").unwrap_or_else(|_| String::new());
-        let mut profiles = Vec::new();
-
         // Always include `~/.profile`
-        profiles.push(home_dir.join(".profile"));
+        let mut profiles = vec![home_dir.join(".profile")];
 
         // PROFILE environment variable, if set
         if let Ok(profile_env) = env::var("PROFILE") {