cli: replace atty with std::io::IsTerminal

The `atty` crate is unmaintained[1] and `std::io::IsTerminal` was
stabilized in Rust 1.70.

[1]: https://rustsec.org/advisories/RUSTSEC-2021-0145.html

PR #2526

.github/workflows/ci.yml

@@ -43,7 +43,7 @@ jobs:
         include:
         - build: pinned
           os: ubuntu-22.04
-          rust: 1.65.0
+          rust: 1.70.0
         - build: stable
           os: ubuntu-22.04
           rust: stable

Cargo.lock

@@ -20,17 +20,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "atty"
-version = "0.2.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
-dependencies = [
- "hermit-abi",
- "libc",
- "winapi",
-]
-
 [[package]]
 name = "base64"
 version = "0.20.0"
@@ -171,7 +160,6 @@ dependencies = [
 name = "grep-cli"
 version = "0.1.7"
 dependencies = [
- "atty",
  "bstr",
  "globset",
  "lazy_static",
@@ -240,15 +228,6 @@ dependencies = [
  "regex",
 ]
 
-[[package]]
-name = "hermit-abi"
-version = "0.1.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "ignore"
 version = "0.4.20"

README.md

@@ -343,7 +343,7 @@ $ pkgman install ripgrep_x86
 
 If you're a **Rust programmer**, ripgrep can be installed with `cargo`.
 
-* Note that the minimum supported version of Rust for ripgrep is **1.65.0**,
+* Note that the minimum supported version of Rust for ripgrep is **1.70.0**,
   although ripgrep may work with older versions.
 * Note that the binary may be bigger than expected because it contains debug
   symbols. This is intentional. To remove debug symbols and therefore reduce

crates/cli/Cargo.toml

@@ -14,7 +14,6 @@ license = "Unlicense OR MIT"
 edition = "2018"
 
 [dependencies]
-atty = "0.2.11"
 bstr = "1.1.0"
 globset = { version = "0.4.10", path = "../globset" }
 lazy_static = "1.1.0"

crates/cli/src/lib.rs

@@ -165,6 +165,8 @@ mod pattern;
 mod process;
 mod wtr;
 
+use std::io::IsTerminal;
+
 pub use crate::decompress::{
     resolve_binary, DecompressionMatcher, DecompressionMatcherBuilder,
     DecompressionReader, DecompressionReaderBuilder,
@@ -215,7 +217,7 @@ pub fn is_readable_stdin() -> bool {
 /// Returns true if and only if stdin is believed to be connected to a tty
 /// or a console.
 pub fn is_tty_stdin() -> bool {
-    atty::is(atty::Stream::Stdin)
+    std::io::stdin().is_terminal()
 }
 
 /// Returns true if and only if stdout is believed to be connected to a tty
@@ -227,11 +229,11 @@ pub fn is_tty_stdin() -> bool {
 /// implementations of `ls` will often show one item per line when stdout is
 /// redirected, but will condensed output when printing to a tty.
 pub fn is_tty_stdout() -> bool {
-    atty::is(atty::Stream::Stdout)
+    std::io::stdout().is_terminal()
 }
 
 /// Returns true if and only if stderr is believed to be connected to a tty
 /// or a console.
 pub fn is_tty_stderr() -> bool {
-    atty::is(atty::Stream::Stderr)
+    std::io::stderr().is_terminal()
 }