fix(id): add feat_smack cfg alias

Author: xtqqczze

src/uu/id/build.rs

@@ -8,5 +8,6 @@ use cfg_aliases::cfg_aliases;
 pub fn main() {
     cfg_aliases! {
         selinux: { all(feature = "feat_selinux", any(target_os = "android", target_os = "linux")) },
+        smack: { all(feature = "feat_smack", target_os = "linux") },
     }
 }

src/uu/id/src/id.rs

@@ -63,9 +63,9 @@ macro_rules! cstr2cow {
 }
 
 fn get_context_help_text() -> String {
-    #[cfg(not(any(selinux, feature = "smack")))]
+    #[cfg(not(any(selinux, smack)))]
     return translate!("id-context-help-disabled");
-    #[cfg(any(selinux, feature = "smack"))]
+    #[cfg(any(selinux, smack))]
     return translate!("id-context-help-enabled");
 }
 
@@ -101,7 +101,7 @@ struct State {
     cflag: bool,  // --context
     #[cfg(selinux)]
     selinux_supported: bool,
-    #[cfg(feature = "smack")]
+    #[cfg(smack)]
     smack_supported: bool,
     ids: Option<Ids>,
     // The behavior for calling GNU's `id` and calling GNU's `id $USER` is similar but different.
@@ -143,7 +143,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
 
         #[cfg(selinux)]
         selinux_supported: uucore::selinux::is_selinux_enabled(),
-        #[cfg(feature = "smack")]
+        #[cfg(smack)]
         smack_supported: uucore::smack::is_smack_enabled(),
         user_specified: !users.is_empty(),
         ids: None,
@@ -193,7 +193,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
         }
 
         // SMACK label
-        #[cfg(feature = "smack")]
+        #[cfg(smack)]
         if state.smack_supported {
             match uucore::smack::get_smack_label_for_self() {
                 Ok(label) => {
@@ -714,7 +714,7 @@ fn id_print(state: &State, groups: &[u32]) -> io::Result<()> {
         }
     }
 
-    #[cfg(feature = "smack")]
+    #[cfg(smack)]
     if state.smack_supported
         && !state.user_specified
         && std::env::var_os("POSIXLY_CORRECT").is_none()