conditional cli args

Cargo.toml

@@ -5,11 +5,15 @@ edition = "2021"
 
 [dependencies]
 anyhow = "1.0"
+cfg-if = "1.0.0"
 clap = { version = "4.5", features = ["derive"] }
 fasteval = "0.2.4"
 tinyaudio = { version = "0.1", optional = true }
 
 [features]
+# default = []
+# default = ["save"]
+# default = ["play"]
 default = ["play", "save"]
 play = ["dep:tinyaudio"]
 save = []

src/cli.rs

@@ -1,11 +1,12 @@
-use std::{
-    fs::read_to_string,
-    ops::Deref,
-    path::{Path, PathBuf},
-    str::FromStr,
-};
+use std::{fs::read_to_string, ops::Deref, path::Path, str::FromStr};
+cfg_if! {
+    if #[cfg(save)] {
+        use std::path::PathBuf;
+    }
+}
 
 use anyhow::{Context, Error};
+use cfg_if::cfg_if;
 use clap::Parser;
 
 #[derive(Parser)]
@@ -13,8 +14,12 @@ use clap::Parser;
 pub(super) struct Args {
     #[arg(short, long, value_parser = Instrument::from_str)]
     instrument: Option<Instrument>,
+    #[cfg(save)]
     #[arg(short, long)]
     output: Option<PathBuf>,
+    #[cfg(play)]
+    #[arg(short, long)]
+    silent: bool,
     score: Score,
 }