Switch from stderrlog to env_logger

Cargo.toml

@@ -32,10 +32,15 @@ rgb = "0.8.36"
 indexmap = "2.0.0"
 libdeflater = "0.14.0"
 log = "0.4.19"
-stderrlog = { version = "0.5.4", optional = true, default-features = false }
 bitvec = "1.0.1"
 rustc-hash = "1.1.0"
 
+[dependencies.env_logger]
+optional = true
+default-features = false
+features = ["auto-color"]
+version = "0.10.0"
+
 [dependencies.crossbeam-channel]
 optional = true
 version = "0.5.8"
@@ -66,7 +71,7 @@ version = "0.24.6"
 rustc_version = "0.4.0"
 
 [features]
-binary = ["clap", "wild", "stderrlog"]
+binary = ["clap", "wild", "env_logger"]
 default = ["binary", "filetime", "parallel", "zopfli"]
 parallel = ["rayon", "indexmap/rayon", "crossbeam-channel"]
 freestanding = ["libdeflater/freestanding"]

src/main.rs

@@ -15,13 +15,14 @@
 
 use clap::{value_parser, Arg, ArgAction, ArgMatches, Command};
 use indexmap::IndexSet;
-use log::{error, warn};
+use log::{error, warn, Level, LevelFilter};
 use oxipng::Deflaters;
 use oxipng::Options;
 use oxipng::RowFilter;
 use oxipng::StripChunks;
 use oxipng::{InFile, OutFile};
 use std::fs::DirBuilder;
+use std::io::Write;
 #[cfg(feature = "zopfli")]
 use std::num::NonZeroU8;
 use std::path::PathBuf;
@@ -384,13 +385,22 @@ fn collect_files(
 fn parse_opts_into_struct(
     matches: &ArgMatches,
 ) -> Result<(OutFile, Option<PathBuf>, Options), String> {
-    stderrlog::new()
-        .module(module_path!())
-        .quiet(matches.get_flag("quiet"))
-        .verbosity(matches.get_count("verbose") as usize + 2)
-        .show_level(false)
-        .init()
-        .unwrap();
+    let log_level = match matches.get_count("verbose") {
+        _ if matches.get_flag("quiet") => LevelFilter::Off,
+        0 => LevelFilter::Info,
+        1 => LevelFilter::Debug,
+        _ => LevelFilter::Trace,
+    };
+    env_logger::builder()
+        .filter_module(module_path!(), log_level)
+        .format(|buf, record| {
+            let style = match record.level() {
+                Level::Info => buf.style(),
+                _ => buf.default_level_style(record.level()),
+            };
+            writeln!(buf, "{}", style.value(record.args()))
+        })
+        .init();
 
     let mut opts = match matches.get_one::<String>("optimization") {
         None => Options::default(),