Replace atty with std

std now has a function for testing if stdout is a tty

Cargo.lock

@@ -37,17 +37,6 @@ dependencies = [
  "nix 0.24.3",
 ]
 
-[[package]]
-name = "atty"
-version = "0.2.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
-dependencies = [
- "hermit-abi 0.1.19",
- "libc",
- "winapi",
-]
-
 [[package]]
 name = "autocfg"
 version = "1.1.0"
@@ -327,7 +316,6 @@ version = "8.7.0"
 dependencies = [
  "anyhow",
  "argmax",
- "atty",
  "chrono",
  "clap",
  "clap_complete",
@@ -403,15 +391,6 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
-[[package]]
-name = "hermit-abi"
-version = "0.1.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "hermit-abi"
 version = "0.2.6"

Cargo.toml

@@ -36,7 +36,6 @@ version_check = "0.9"
 [dependencies]
 nu-ansi-term = "0.47"
 argmax = "0.3.1"
-atty = "0.2"
 ignore = "0.4.20"
 num_cpus = "1.15"
 regex = "1.7.3"

src/main.rs

@@ -12,12 +12,12 @@ mod regex_helper;
 mod walk;
 
 use std::env;
+use std::io::IsTerminal;
 use std::path::Path;
 use std::sync::Arc;
 use std::time;
 
 use anyhow::{anyhow, bail, Context, Result};
-use atty::Stream;
 use clap::{CommandFactory, Parser};
 use globset::GlobBuilder;
 use lscolors::LsColors;
@@ -217,7 +217,7 @@ fn construct_config(mut opts: Opts, pattern_regexps: &[String]) -> Result<Config
     #[cfg(not(windows))]
     let ansi_colors_support = true;
 
-    let interactive_terminal = atty::is(Stream::Stdout);
+    let interactive_terminal = std::io::stdout().is_terminal();
     let colored_output = match opts.color {
         ColorWhen::Always => true,
         ColorWhen::Never => false,