Add Ctrl+C handler on windows

src/bin/cargo/main.rs

@@ -28,6 +28,7 @@ fn main() {
         }
     };
 
+    let _ = ctrlc::set();
     let result = if let Some(lock_addr) = cargo::ops::fix_get_proxy_lock_addr() {
         cargo::ops::fix_exec_rustc(&gctx, &lock_addr).map_err(|e| CliError::from(e))
     } else {
@@ -41,6 +42,29 @@ fn main() {
     }
 }
 
+#[cfg(windows)]
+mod ctrlc {
+    use super::ProcessError;
+    use anyhow::Result;
+    use cargo::util::TaskbarProgress;
+    use windows_sys::Win32::Foundation::{BOOL, FALSE, TRUE};
+    use windows_sys::Win32::System::Console::SetConsoleCtrlHandler;
+
+    unsafe extern "system" fn ctrlc_handler(_: u32) -> BOOL {
+        eprintln!("{}", TaskbarProgress::None);
+        std::process::exit(0);
+    }
+
+    pub fn set() -> Result<()> {
+        unsafe {
+            if SetConsoleCtrlHandler(Some(ctrlc_handler), TRUE) == FALSE {
+                return Err(ProcessError::new("Could not set Ctrl-C handler.", None, None).into());
+            }
+        }
+        Ok(())
+    }
+}
+
 fn setup_logger() -> Option<ChromeFlushGuard> {
     use tracing_subscriber::prelude::*;
 

src/cargo/util/mod.rs

@@ -18,7 +18,7 @@ pub use self::into_url::IntoUrl;
 pub use self::into_url_with_base::IntoUrlWithBase;
 pub(crate) use self::io::LimitErrorReader;
 pub use self::lockserver::{LockServer, LockServerClient, LockServerStarted};
-pub use self::progress::{Progress, ProgressStyle};
+pub use self::progress::{Progress, ProgressStyle, TaskbarProgress};
 pub use self::queue::Queue;
 pub use self::rustc::Rustc;
 pub use self::semver_ext::{OptVersionReq, VersionExt};

src/cargo/util/progress.rs

@@ -76,7 +76,7 @@ struct Format {
     max_print: usize,
 }
 
-enum TaskbarProgress {
+pub enum TaskbarProgress {
     None,
     Value(u8),
     Error,