fix(id): add feat_selinux cfg alias

Author: xtqqczze

Cargo.lock

@@ -18,6 +18,9 @@ workspace = true
 [lib]
 path = "src/id.rs"
 
+[build-dependencies]
+cfg_aliases.workspace = true
+
 [dependencies]
 clap = { workspace = true }
 uucore = { workspace = true, features = ["entries", "process"] }

src/uu/id/Cargo.toml

@@ -0,0 +1,12 @@
+// This file is part of the uutils coreutils package.
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
+
+use cfg_aliases::cfg_aliases;
+
+pub fn main() {
+    cfg_aliases! {
+        selinux: { all(feature = "feat_selinux", any(target_os = "android", target_os = "linux")) },
+    }
+}

src/uu/id/build.rs

@@ -63,9 +63,9 @@ macro_rules! cstr2cow {
 }
 
 fn get_context_help_text() -> String {
-    #[cfg(not(any(feature = "selinux", feature = "smack")))]
+    #[cfg(not(any(selinux, feature = "smack")))]
     return translate!("id-context-help-disabled");
-    #[cfg(any(feature = "selinux", feature = "smack"))]
+    #[cfg(any(selinux, feature = "smack"))]
     return translate!("id-context-help-enabled");
 }
 
@@ -99,7 +99,7 @@ struct State {
     rflag: bool,  // --real
     zflag: bool,  // --zero
     cflag: bool,  // --context
-    #[cfg(feature = "selinux")]
+    #[cfg(selinux)]
     selinux_supported: bool,
     #[cfg(feature = "smack")]
     smack_supported: bool,
@@ -141,7 +141,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
         zflag: matches.get_flag(options::OPT_ZERO),
         cflag: matches.get_flag(options::OPT_CONTEXT),
 
-        #[cfg(feature = "selinux")]
+        #[cfg(selinux)]
         selinux_supported: uucore::selinux::is_selinux_enabled(),
         #[cfg(feature = "smack")]
         smack_supported: uucore::smack::is_smack_enabled(),
@@ -179,7 +179,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
 
     if state.cflag {
         // SELinux context
-        #[cfg(feature = "selinux")]
+        #[cfg(selinux)]
         if state.selinux_supported {
             if let Ok(context) = selinux::SecurityContext::current(false) {
                 let bytes = context.as_bytes();
@@ -702,7 +702,7 @@ fn id_print(state: &State, groups: &[u32]) -> io::Result<()> {
             .join(",")
     )?;
 
-    #[cfg(feature = "selinux")]
+    #[cfg(selinux)]
     if state.selinux_supported
         && !state.user_specified
         && std::env::var_os("POSIXLY_CORRECT").is_none()