Correct wheel naming when targeting iOS

Changelog.md

@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+* Fix iOS wheel naming to be compliant with PEP 730.
 * Fix generated WHEEL Tag metadata to be spec compliant.
 * Remove `add_directory()` from ModuleWriter and make it an implementation detail for the specific impl
 

src/build_context.rs

@@ -620,6 +620,21 @@ impl BuildContext {
                     format!("macosx_{x86_64_tag}_x86_64")
                 }
             }
+            // iOS (simulator and device)
+            (Os::Ios, Arch::X86_64) | (Os::Ios, Arch::Aarch64) => {
+                let arch = if target.target_arch() == Arch::Aarch64 {
+                    "arm64"
+                } else {
+                    "x86_64"
+                };
+                let abi = if self.target.target_triple().ends_with("-sim") {
+                    "iphonesimulator"
+                } else {
+                    "iphoneos"
+                };
+                let (min_sdk_major, min_sdk_minor) = iphoneos_deployment_target(env::var("IPHONEOS_DEPLOYMENT_TARGET").ok().as_deref())?;
+                format!("ios_{min_sdk_major}_{min_sdk_minor}_{arch}_{abi}")
+            }
             // FreeBSD
             | (Os::FreeBsd, _) => {
                 format!(
@@ -1256,6 +1271,23 @@ fn macosx_deployment_target(
     ))
 }
 
+/// Get the iOS deployment target version
+fn iphoneos_deployment_target(deploy_target: Option<&str>) -> Result<(u16, u16)> {
+    let (major, minor) = if let Some(deploy_target) = deploy_target {
+        let err_ctx = "IPHONEOS_DEPLOYMENT_TARGET is invalid";
+        let mut parts = deploy_target.split('.');
+        let major = parts.next().context(err_ctx)?;
+        let major: u16 = major.parse().context(err_ctx)?;
+        let minor = parts.next().context(err_ctx)?;
+        let minor: u16 = minor.parse().context(err_ctx)?;
+        (major, minor)
+    } else {
+        (13, 0)
+    };
+
+    Ok((major, minor))
+}
+
 #[inline]
 fn python_macosx_target_version(version: (u16, u16)) -> (u16, u16) {
     let (major, minor) = version;
@@ -1360,7 +1392,7 @@ fn emcc_version() -> Result<String> {
 
 #[cfg(test)]
 mod tests {
-    use super::macosx_deployment_target;
+    use super::{iphoneos_deployment_target, macosx_deployment_target};
     use pretty_assertions::assert_eq;
 
     #[test]
@@ -1398,4 +1430,26 @@ mod tests {
             ((11, 0), (11, 0))
         );
     }
+
+    #[test]
+    fn test_iphoneos_deployment_target() {
+        // Use default when no value is provided
+        assert_eq!(iphoneos_deployment_target(None).unwrap(), (13, 0));
+
+        // Valid version strings
+        assert_eq!(iphoneos_deployment_target(Some("13.0")).unwrap(), (13, 0));
+        assert_eq!(iphoneos_deployment_target(Some("14.5")).unwrap(), (14, 5));
+        assert_eq!(iphoneos_deployment_target(Some("15.0")).unwrap(), (15, 0));
+        // Extra parts are ignored
+        assert_eq!(iphoneos_deployment_target(Some("14.5.1")).unwrap(), (14, 5));
+
+        // Invalid formats
+        assert!(iphoneos_deployment_target(Some("invalid")).is_err());
+        assert!(iphoneos_deployment_target(Some("13")).is_err());
+        assert!(iphoneos_deployment_target(Some("13.")).is_err());
+        assert!(iphoneos_deployment_target(Some(".0")).is_err());
+        assert!(iphoneos_deployment_target(Some("abc.def")).is_err());
+        assert!(iphoneos_deployment_target(Some("13.abc")).is_err());
+        assert!(iphoneos_deployment_target(Some("")).is_err());
+    }
 }

src/target/mod.rs

@@ -454,7 +454,7 @@ impl Target {
             Os::Windows => "windows",
             Os::Linux => "linux",
             Os::Macos => "darwin",
-            Os::Ios => "darwin",
+            Os::Ios => "ios",
             Os::FreeBsd => "freebsd",
             Os::NetBsd => "netbsd",
             Os::OpenBsd => "openbsd",
@@ -604,6 +604,12 @@ impl Target {
         self.os == Os::Macos
     }
 
+    /// Returns true if the current platform is iOS
+    #[inline]
+    pub fn is_ios(&self) -> bool {
+        self.os == Os::Ios
+    }
+
     /// Returns true if the current platform is windows
     #[inline]
     pub fn is_windows(&self) -> bool {

src/target/pypi_tags.rs

@@ -225,6 +225,9 @@ mod tests {
             ("aarch64-linux-android", true),
             ("armv7-linux-androideabi", true),
             ("riscv64gc-unknown-linux-gnu", true),
+            ("aarch64-apple-ios", true),
+            ("aarch64-apple-ios-sim", true),
+            ("x86_64-apple-ios", true),
             ("x86_64-unknown-freebsd", false), // Now unsupported (no lazy validation)
             ("powerpc64-unknown-linux-gnu", true), // PPC64 on Linux is supported
             ("s390x-unknown-linux-gnu", true), // s390x on Linux is supported