Add a Windows manifest to uv binaries

Cargo.toml

@@ -107,6 +107,7 @@ dotenvy = { version = "0.15.7" }
 dunce = { version = "1.0.5" }
 either = { version = "1.13.0" }
 encoding_rs_io = { version = "0.1.7" }
+embed-manifest = { version = "1.5.0" }
 etcetera = { version = "0.11.0" }
 fastrand = { version = "2.3.0" }
 flate2 = { version = "1.0.33", default-features = false, features = ["zlib-rs"] }

crates/uv/Cargo.toml

@@ -121,6 +121,11 @@ arrayvec = { workspace = true }
 self-replace = { workspace = true }
 windows = { workspace = true }
 
+[build-dependencies]
+uv-version = { workspace = true }
+
+embed-manifest = { workspace = true }
+
 [dev-dependencies]
 uv-publish = { workspace = true, features = ["test"] }
 

crates/uv/build.rs

@@ -0,0 +1,39 @@
+//! This embeds a "manifest" - a special XML document - into the uv binary on Windows builds.
+//!
+//! It includes reasonable defaults for Windows binaries:
+//! - `System` codepage to retain backwards compatibility with previous uv releases.
+//!   We can set to the utf-8 codepage in a future breaking release which lets us use the
+//!   *A versions of Windows API functions without utf-16 conversion.
+//! - Long path awareness allows paths longer than 260 characters in Windows operations.
+//!   This still requires `LongPathsEnabled` to be set in the Windows registry.
+//! - Declared Windows 7-10+ compatibility to avoid legacy compat layers from being potentially
+//!   applied by not specifying any. This does not imply actual Windows 7, 8.0, 8.1 support. In
+//!   cases where the application is run on Windows 7, the app is treated as Windows 7 aware
+//!   rather than an unspecified legacy application (e.g. Windows XP).
+//! - Standard invoker execution levels for CLI applications to disable UAC virtualization.
+//!
+//! See <https://learn.microsoft.com/en-us/windows/win32/sbscs/application-manifests>
+use embed_manifest::manifest::{ActiveCodePage, ExecutionLevel, Setting, SupportedOS};
+use embed_manifest::{embed_manifest, empty_manifest};
+
+fn main() {
+    if std::env::var_os("CARGO_CFG_WINDOWS").is_some() {
+        let [major, minor, patch] = uv_version::version()
+            .splitn(3, '.')
+            .map(str::parse)
+            .collect::<Result<Vec<u16>, _>>()
+            .ok()
+            .and_then(|v| v.try_into().ok())
+            .expect("uv version must be in x.y.z format");
+        let manifest = empty_manifest()
+            .name("uv")
+            .version(major, minor, patch, 0)
+            .active_code_page(ActiveCodePage::System)
+            // "Windows10" includes Windows 10 and 11, and Windows Server 2016, 2019 and 2022
+            .supported_os(SupportedOS::Windows7..=SupportedOS::Windows10)
+            .requested_execution_level(ExecutionLevel::AsInvoker)
+            .long_path_aware(Setting::Enabled);
+        embed_manifest(manifest).expect("unable to embed manifest");
+    }
+    println!("cargo:rerun-if-changed=build.rs");
+}