test on alpine, clippy & rustfmt

.drone.yml

@@ -4,7 +4,11 @@ type: docker
 name: default
 
 steps:
-- name: build
+- name: linux-gnu
   image: rust:latest
   commands:
   - cargo test -j3
+- name: linux-musl
+  image: rust:alpine
+  commands:
+  - cargo test -j3

clippy.sh

@@ -8,7 +8,7 @@ cargo clippy -- \
  -W clippy::cargo \
  -A clippy::unused_io_amount \
  -A clippy::redundant_closure_for_method_calls \
- -A clippy::shadow_unrelated \
+ -A clippy::shadow_unrelated
 
 # ALLOWS:
 # unused_io_amount: there are two places where i want to read up to X bytes and i'm fine with getting less than that

src/extension_set.rs

@@ -19,7 +19,7 @@ pub enum ExtensionSet {
 }
 
 impl ExtensionSet {
-	/// The list of known extensions for this ExtensionSet.
+	/// The list of known extensions for this `ExtensionSet`.
 	pub fn extensions(&self) -> Vec<&str> {
 		match self {
 			Self::Images => mime_guess::get_mime_extensions_str("image/*").unwrap().to_vec(),

src/findings.rs

@@ -1,7 +1,7 @@
 use std::path::PathBuf;
 
 use mime_guess::Mime;
-use smartstring::alias::*;
+use smartstring::alias::String;
 
 use crate::inspectors::mime_extension_lookup;
 

src/formats.rs

@@ -3,7 +3,7 @@
 use std::io::{self, Write};
 #[cfg(unix)]
 use std::os::unix::ffi::OsStrExt;
-use std::path::{Path};
+use std::path::Path;
 
 use snailquote::escape;
 

src/inspectors.rs

@@ -14,12 +14,12 @@ use crate::mime_db::MimeDb;
 
 /// The number of bytes to read initially.
 ///
-/// Rather than reading the entire file all at once into a [BUF_SIZE] buffer, it tends to be faster to read a small
+/// Rather than reading the entire file all at once into a [`BUF_SIZE`] buffer, it tends to be faster to read a small
 /// chunk of the file and trying to identify that, proceeding with the larger buffer if that fails. Many file formats
 /// can be identified with the first few dozen bytes, so the "happy path" will likely be taken in the majority of cases.
 const INITIAL_BUF_SIZE: usize = 128;
 
-/// The number of bytes to read if the file couldn't be identified from its first [INITIAL_BUF_SIZE] bytes.
+/// The number of bytes to read if the file couldn't be identified from its first [`INITIAL_BUF_SIZE`] bytes.
 const BUF_SIZE: usize = 4096;
 
 /// Tries to identify the mimetype of a file from a given path.

src/main.rs

@@ -189,20 +189,20 @@ fn wanted_file(entry: &DirEntry, exts: &[&str], scan_opts: &ScanOpts) -> bool {
 	exts.contains(&ext.unwrap().to_lowercase().as_str())
 }
 
-/// Given a file path, returns its extension, using [std::path::Path::extension].
+/// Given a file path, returns its extension, using [`std::path::Path::extension`].
 ///
 /// The extension is currently [converted to a lossy string](std::ffi::OsStr::to_string_lossy), although it will
-/// (eventually) in future return an OsStr instead.
+/// (eventually) in future return an `OsStr` instead.
 // TODO: ↑
 fn extension_from_path(path: &Path) -> Option<String> {
 	path.extension(). // Get the path's extension
 		map(|e| String::from(e.to_string_lossy())) // Convert from OsStr to String
 }
 
-/// Inspects the given entry, returning a [Findings] on success and a [ScanError] on failure.
+/// Inspects the given entry, returning a [`Findings`] on success and a [`ScanError`] on failure.
 ///
-/// In the event of an IO error, the returned ScanError will be of type [ScanError::File]. Otherwise, a
-/// [ScanError::Mime] will be returned, meaning that the file was scanned successfully, but a mimetype could not be
+/// In the event of an IO error, the returned [`ScanError`] will be of type [`ScanError::File`]. Otherwise, a
+/// [`ScanError::Mime`] will be returned, meaning that the file was scanned successfully, but a mimetype could not be
 /// determined.
 fn scan_file(entry: &DirEntry) -> Result<Findings, ScanError> {
 	// try to determine mimetype for this entry
@@ -242,7 +242,7 @@ fn scan_file(entry: &DirEntry) -> Result<Findings, ScanError> {
 	})
 }
 
-/// Takes a slice of [DirEntry]s and calls [scan_file] on each one, returning the results in a vector.
+/// Takes a slice of [`DirEntry`]s and calls [`scan_file`] on each one, returning the results in a vector.
 fn scan_from_walkdir(entries: &[DirEntry]) -> Vec<Result<Findings, ScanError>> {
 	cfg_if! {
 		if #[cfg(feature = "multi-threaded")] {
@@ -264,9 +264,9 @@ fn scan_from_walkdir(entries: &[DirEntry]) -> Vec<Result<Findings, ScanError>> {
 	}
 }
 
-/// Scans a given directory with [WalkDir], filters with [wanted_file], checks for errors, and returns a vector of
+/// Scans a given directory with [`WalkDir`], filters with [`wanted_file`], checks for errors, and returns a vector of
 /// [DirEntry]s.
-fn scan_directory(dirs: &PathBuf, exts: &Vec<&str>, scan_opts: &ScanOpts) -> Option<Vec<DirEntry>> {
+fn scan_directory(dirs: &PathBuf, exts: &[&str], scan_opts: &ScanOpts) -> Option<Vec<DirEntry>> {
 	let stepper = WalkDir::new(dirs).into_iter();
 	let mut probably_fatal_error = false;
 	let entries: Vec<DirEntry> = stepper

src/parameters.rs

@@ -3,7 +3,7 @@
 use std::path::PathBuf;
 
 use crate::extension_set::ExtensionSet;
-use clap::{Clap, AppSettings};
+use clap::{AppSettings, Clap};
 use smartstring::{LazyCompact, SmartString};
 
 #[derive(Clap, PartialEq, Debug)]
@@ -66,7 +66,7 @@ pub struct ScanOpts {
 	/// Whether hidden files and directories should be scanned.
 	pub hidden: bool,
 	/// Whether files without extensions should be scanned.
-	pub extensionless: bool
+	pub extensionless: bool,
 }
 
 impl Parameters {
@@ -83,7 +83,10 @@ impl Parameters {
 		}
 	}
 
-	pub fn get_scan_opts(&self) -> ScanOpts {
-		ScanOpts { hidden: self.scan_hidden, extensionless: self.scan_extensionless }
+	pub const fn get_scan_opts(&self) -> ScanOpts {
+		ScanOpts {
+			hidden: self.scan_hidden,
+			extensionless: self.scan_extensionless,
+		}
 	}
 }

src/tests/mod.rs

@@ -97,7 +97,7 @@ fn simple_directory() {
 
 	let scan_opts = ScanOpts {
 		hidden: true,
-		extensionless: false
+		extensionless: false,
 	};
 
 	let entries = scan_directory(