feat: v0.3.7, yubikey is optional

src/main.rs

@@ -1,18 +1,20 @@
 use clap::{App, AppSettings, ArgMatches};
-use rust_util::{failure_and_exit, information, success, warning};
 use rust_util::util_clap::{Command, CommandError};
+use rust_util::{failure_and_exit, information, success, warning};
 
 mod db;
 mod proc;
 mod jose;
 mod cli;
-mod yubikey_hmac;
 mod serve;
 mod serve_common;
 mod serve_status;
 mod serve_init;
 mod serve_encrypt_decrypt;
 mod serve_read_write;
+#[cfg(feature = "yubikey")]
+mod yubikey_hmac;
+#[cfg(feature = "yubikey")]
 mod yubikey_init_master_key;
 mod serve_datakey;
 
@@ -48,12 +50,17 @@ fn inner_main() -> CommandError {
     let commands: Vec<Box<dyn Command>> = vec![
         Box::new(cli::CommandImpl),
         Box::new(serve::CommandImpl),
+        #[cfg(feature = "yubikey")]
         Box::new(yubikey_init_master_key::CommandImpl),
     ];
+    let mut features: Vec<String> = vec![];
+    #[cfg(feature = "yubikey")]
+    features.push("yubikey".to_string());
+    let long_about = format!("Local mini KMS, features: [{}]", features.join(", "));
     let mut app = App::new(env!("CARGO_PKG_NAME"))
         .version(env!("CARGO_PKG_VERSION"))
         .about(env!("CARGO_PKG_DESCRIPTION"))
-        .long_about("Local mini KMS")
+        .long_about(long_about.as_str())
         .setting(AppSettings::ColoredHelp);
     app = DefaultCommandImpl::process_command(app);
     for command in &commands {