Switch from lazy_static to once_cell

Cargo.toml

@@ -19,8 +19,8 @@ ansi-parsing = []
 
 [dependencies]
 libc = "0.2.99"
+once_cell = "1.8"
 unicode-width = { version = "0.2", optional = true }
-lazy_static = "1.4.0"
 
 [target.'cfg(windows)'.dependencies]
 encode_unicode = "1"

src/ansi.rs

@@ -271,18 +271,18 @@ impl FusedIterator for AnsiCodeIterator<'_> {}
 mod tests {
     use super::*;
 
-    use lazy_static::lazy_static;
+    use once_cell::sync::Lazy;
     use proptest::prelude::*;
     use regex::Regex;
 
     // The manual dfa `State` is a handwritten translation from the previously used regex. That
     // regex is kept here and used to ensure that the new matches are the same as the old
-    lazy_static! {
-        static ref STRIP_ANSI_RE: Regex = Regex::new(
+    static STRIP_ANSI_RE: Lazy<Regex> = Lazy::new(|| {
+        Regex::new(
             r"[\x1b\x9b]([()][012AB]|[\[()#;?]*(?:[0-9]{1,4}(?:;[0-9]{0,4})*)?[0-9A-PRZcf-nqry=><])",
         )
-        .unwrap();
-    }
+        .unwrap()
+    });
 
     impl<'a> PartialEq<Match<'a>> for regex::Match<'_> {
         fn eq(&self, other: &Match<'a>) -> bool {

src/unix_term.rs

@@ -7,6 +7,9 @@ use std::mem;
 use std::os::unix::io::AsRawFd;
 use std::str;
 
+#[cfg(not(target_os = "macos"))]
+use once_cell::sync::Lazy;
+
 use crate::kb::Key;
 use crate::term::Term;
 
@@ -343,12 +346,10 @@ pub fn key_from_utf8(buf: &[u8]) -> Key {
 }
 
 #[cfg(not(target_os = "macos"))]
-lazy_static::lazy_static! {
-    static ref IS_LANG_UTF8: bool = match std::env::var("LANG") {
-        Ok(lang) => lang.to_uppercase().ends_with("UTF-8"),
-        _ => false,
-    };
-}
+static IS_LANG_UTF8: Lazy<bool> = Lazy::new(|| match std::env::var("LANG") {
+    Ok(lang) => lang.to_uppercase().ends_with("UTF-8"),
+    _ => false,
+});
 
 #[cfg(target_os = "macos")]
 pub fn wants_emoji() -> bool {

src/utils.rs

@@ -4,7 +4,7 @@ use std::env;
 use std::fmt;
 use std::sync::atomic::{AtomicBool, Ordering};
 
-use lazy_static::lazy_static;
+use once_cell::sync::Lazy;
 
 use crate::term::{wants_emoji, Term};
 
@@ -22,10 +22,10 @@ fn default_colors_enabled(out: &Term) -> bool {
         || &env::var("CLICOLOR_FORCE").unwrap_or_else(|_| "0".into()) != "0"
 }
 
-lazy_static! {
-    static ref STDOUT_COLORS: AtomicBool = AtomicBool::new(default_colors_enabled(&Term::stdout()));
-    static ref STDERR_COLORS: AtomicBool = AtomicBool::new(default_colors_enabled(&Term::stderr()));
-}
+static STDOUT_COLORS: Lazy<AtomicBool> =
+    Lazy::new(|| AtomicBool::new(default_colors_enabled(&Term::stdout())));
+static STDERR_COLORS: Lazy<AtomicBool> =
+    Lazy::new(|| AtomicBool::new(default_colors_enabled(&Term::stderr())));
 
 /// Returns `true` if colors should be enabled for stdout.
 ///