Print secret message to tty, normal message otherwise

Port 586ff3e547feddb782dde3d8dde7e45842df92ba from FuelLabs/fuel-core#1426

Context: FuelLabs/fuel-core#1426 (comment)

forc-plugins/forc-crypto/Cargo.toml

@@ -12,6 +12,7 @@ repository.workspace = true
 [dependencies]
 anyhow = "1.0.75"
 async-trait = "0.1.58"
+atty = "0.2.14"
 clap = { version = "3", features = ["derive", "env"] }
 forc-tracing = { version = "0.46.0", path = "../../forc-tracing" }
 fuel-core-types = { version = "0.20.5" }

forc-plugins/forc-crypto/src/keygen/mod.rs

@@ -1,5 +1,7 @@
+use atty::Stream;
 use clap::ValueEnum;
-use std::io::{Read, Write};
+use std::io::{stdin, stdout, Read, Write};
+use termion::screen::IntoAlternateScreen;
 
 pub mod new_key;
 pub mod parse_secret;
@@ -16,18 +18,21 @@ pub enum KeyType {
 
 fn wait_for_keypress() {
     let mut single_key = [0u8];
-    std::io::stdin().read_exact(&mut single_key).unwrap();
+    stdin().read_exact(&mut single_key).unwrap();
 }
 
 pub(crate) fn display_string_discreetly(
     discreet_string: &str,
     continue_message: &str,
 ) -> anyhow::Result<()> {
-    use termion::screen::IntoAlternateScreen;
-    let mut screen = std::io::stdout().into_alternate_screen()?;
-    writeln!(screen, "{discreet_string}")?;
-    screen.flush()?;
-    println!("{continue_message}");
-    wait_for_keypress();
+    if atty::is(Stream::Stdout) {
+        let mut screen = stdout().into_alternate_screen()?;
+        writeln!(screen, "{discreet_string}")?;
+        screen.flush()?;
+        println!("{continue_message}");
+        wait_for_keypress();
+    } else {
+        print!("{discreet_string}");
+    }
     Ok(())
 }