id: add selinux/smack cfg alias

Author: xtqqczze

Cargo.lock

@@ -19,6 +19,9 @@ path = "src/id.rs"
 test = false
 doctest = false
 
+[build-dependencies]
+cfg_aliases.workspace = true
+
 [dependencies]
 clap = { workspace = true }
 uucore = { workspace = true, features = ["entries", "process"] }

src/uu/id/Cargo.toml

@@ -0,0 +1,13 @@
+// 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 = "selinux", any(target_os = "android", target_os = "linux")) },
+        smack: { all(feature = "smack", target_os = "linux") },
+    }
+}

src/uu/id/build.rs

@@ -63,10 +63,9 @@ macro_rules! cstr2cow {
 }
 
 fn get_context_help_text() -> String {
-    #[cfg(any(
-        all(feature = "selinux", any(target_os = "android", target_os = "linux")),
-        all(feature = "smack", target_os = "linux"),
-    ))]
+    #[cfg(not(any(selinux, smack)))]
+    return translate!("id-context-help-disabled");
+    #[cfg(any(selinux, smack))]
     return translate!("id-context-help-enabled");
 
     #[cfg(not(any(
@@ -106,9 +105,9 @@ struct State {
     rflag: bool,  // --real
     zflag: bool,  // --zero
     cflag: bool,  // --context
-    #[cfg(all(feature = "selinux", any(target_os = "linux", target_os = "android")))]
+    #[cfg(selinux)]
     selinux_supported: bool,
-    #[cfg(all(feature = "smack", target_os = "linux"))]
+    #[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.
@@ -147,9 +146,9 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
         rflag: matches.get_flag(options::OPT_REAL_ID),
         zflag: matches.get_flag(options::OPT_ZERO),
         cflag: matches.get_flag(options::OPT_CONTEXT),
-        #[cfg(all(feature = "selinux", any(target_os = "linux", target_os = "android")))]
+        #[cfg(selinux)]
         selinux_supported: uucore::selinux::is_selinux_enabled(),
-        #[cfg(all(feature = "smack", target_os = "linux"))]
+        #[cfg(smack)]
         smack_supported: uucore::smack::is_smack_enabled(),
         user_specified: !users.is_empty(),
         ids: None,
@@ -185,7 +184,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
 
     if state.cflag {
         // SELinux context
-        #[cfg(all(feature = "selinux", any(target_os = "linux", target_os = "android")))]
+        #[cfg(selinux)]
         if state.selinux_supported {
             if let Ok(context) = selinux::SecurityContext::current(false) {
                 let bytes = context.as_bytes();
@@ -199,7 +198,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
         }
 
         // SMACK label
-        #[cfg(all(feature = "smack", target_os = "linux"))]
+        #[cfg(smack)]
         if state.smack_supported {
             match uucore::smack::get_smack_label_for_self() {
                 Ok(label) => {
@@ -711,7 +710,7 @@ fn id_print(state: &State, groups: &[u32]) -> io::Result<()> {
             .join(",")
     )?;
 
-    #[cfg(all(feature = "selinux", any(target_os = "linux", target_os = "android")))]
+    #[cfg(selinux)]
     if state.selinux_supported
         && !state.user_specified
         && std::env::var_os("POSIXLY_CORRECT").is_none()
@@ -723,7 +722,7 @@ fn id_print(state: &State, groups: &[u32]) -> io::Result<()> {
         }
     }
 
-    #[cfg(all(feature = "smack", target_os = "linux"))]
+    #[cfg(smack)]
     if state.smack_supported
         && !state.user_specified
         && std::env::var_os("POSIXLY_CORRECT").is_none()