compiler: Add Windows resources to rustc-main and rustc_driver

Adds Windows resources with the rust version information to rustc-main.exe and rustc_driver.dll

Sets the product description to "Rust Compiler" or "Rust Compiler (channel)" for non-stable channels

11 files changed, 271 insertions, 8 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 8b9c243879c..03bda287c49 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3248,6 +3248,7 @@ dependencies = [
  "rustc_driver_impl",
  "rustc_public",
  "rustc_public_bridge",
+ "rustc_windows_rc",
  "tikv-jemalloc-sys",
 ]
 
@@ -3623,6 +3624,7 @@ name = "rustc_driver"
 version = "0.0.0"
 dependencies = [
  "rustc_driver_impl",
+ "rustc_windows_rc",
 ]
 
 [[package]]
@@ -4719,6 +4721,13 @@ dependencies = [
 ]
 
 [[package]]
+name = "rustc_windows_rc"
+version = "0.0.0"
+dependencies = [
+ "cc",
+]
+
+[[package]]
 name = "rustdoc"
 version = "0.0.0"
 dependencies = [
diff --git a/compiler/rustc/Cargo.toml b/compiler/rustc/Cargo.toml
index 3ca75235446..e3214d1ab9c 100644
--- a/compiler/rustc/Cargo.toml
+++ b/compiler/rustc/Cargo.toml
@@ -33,3 +33,8 @@ llvm = ['rustc_driver_impl/llvm']
 max_level_info = ['rustc_driver_impl/max_level_info']
 rustc_randomized_layouts = ['rustc_driver_impl/rustc_randomized_layouts']
 # tidy-alphabetical-end
+
+[build-dependencies]
+# tidy-alphabetical-start
+rustc_windows_rc = { path = "../rustc_windows_rc" }
+# tidy-alphabetical-end
diff --git a/compiler/rustc/build.rs b/compiler/rustc/build.rs
index 8b7d28d2b8a..9b5def53e3c 100644
--- a/compiler/rustc/build.rs
+++ b/compiler/rustc/build.rs
@@ -1,4 +1,6 @@
-use std::env;
+use std::{env, path};
+
+use rustc_windows_rc::{VersionInfoFileType, compile_windows_resource_file};
 
 fn main() {
     let target_os = env::var("CARGO_CFG_TARGET_OS");
@@ -13,6 +15,18 @@ fn main() {
 
 // Add a manifest file to rustc.exe.
 fn set_windows_exe_options() {
+    set_windows_resource();
+    set_windows_manifest();
+}
+
+fn set_windows_resource() {
+    let stem = path::PathBuf::from("rustc_main_resource");
+    let file_description = "rustc";
+    let res_file = compile_windows_resource_file(&stem, file_description, VersionInfoFileType::App);
+    println!("cargo:rustc-link-arg={}", res_file.display());
+}
+
+fn set_windows_manifest() {
     static WINDOWS_MANIFEST_FILE: &str = "Windows Manifest.xml";
 
     let mut manifest = env::current_dir().unwrap();
diff --git a/compiler/rustc_codegen_ssa/Cargo.toml b/compiler/rustc_codegen_ssa/Cargo.toml
index 57e1fee2c0a..afcfe82d68d 100644
--- a/compiler/rustc_codegen_ssa/Cargo.toml
+++ b/compiler/rustc_codegen_ssa/Cargo.toml
@@ -9,7 +9,7 @@ ar_archive_writer = "0.4.2"
 bitflags.workspace = true
 bstr = "1.11.3"
 # `cc` updates often break things, so we pin it here. Cargo enforces "max 1 semver-compat version
-# per crate", so if you change this, you need to also change it in `rustc_llvm`.
+# per crate", so if you change this, you need to also change it in `rustc_llvm` and `rustc_windows_rc`.
 cc = "=1.2.16"
 itertools.workspace = true
 pathdiff = "0.2.0"
diff --git a/compiler/rustc_driver/Cargo.toml b/compiler/rustc_driver/Cargo.toml
index e3ee8351295..51909719827 100644
--- a/compiler/rustc_driver/Cargo.toml
+++ b/compiler/rustc_driver/Cargo.toml
@@ -10,3 +10,8 @@ crate-type = ["dylib"]
 # tidy-alphabetical-start
 rustc_driver_impl = { path = "../rustc_driver_impl" }
 # tidy-alphabetical-end
+
+[build-dependencies]
+# tidy-alphabetical-start
+rustc_windows_rc = { path = "../rustc_windows_rc" }
+# tidy-alphabetical-end
diff --git a/compiler/rustc_driver/build.rs b/compiler/rustc_driver/build.rs
new file mode 100644
index 00000000000..ba44fe7a86e
--- /dev/null
+++ b/compiler/rustc_driver/build.rs
@@ -0,0 +1,21 @@
+use std::{env, path};
+
+use rustc_windows_rc::{VersionInfoFileType, compile_windows_resource_file};
+
+fn main() {
+    let target_os = env::var("CARGO_CFG_TARGET_OS");
+    let target_env = env::var("CARGO_CFG_TARGET_ENV");
+    if Ok("windows") == target_os.as_deref() && Ok("msvc") == target_env.as_deref() {
+        set_windows_dll_options();
+    } else {
+        // Avoid rerunning the build script every time.
+        println!("cargo:rerun-if-changed=build.rs");
+    }
+}
+
+fn set_windows_dll_options() {
+    let stem = path::PathBuf::from("rustc_driver_resource");
+    let file_description = "rustc_driver";
+    let res_file = compile_windows_resource_file(&stem, file_description, VersionInfoFileType::Dll);
+    println!("cargo:rustc-link-arg={}", res_file.display());
+}
diff --git a/compiler/rustc_llvm/Cargo.toml b/compiler/rustc_llvm/Cargo.toml
index e74de453be2..6321104ee3e 100644
--- a/compiler/rustc_llvm/Cargo.toml
+++ b/compiler/rustc_llvm/Cargo.toml
@@ -11,7 +11,7 @@ libc.workspace = true
 [build-dependencies]
 # tidy-alphabetical-start
 # `cc` updates often break things, so we pin it here. Cargo enforces "max 1 semver-compat version
-# per crate", so if you change this, you need to also change it in `rustc_codegen_ssa`.
+# per crate", so if you change this, you need to also change it in `rustc_codegen_ssa` and `rustc_windows_rc`.
 cc = "=1.2.16"
 # tidy-alphabetical-end
 
diff --git a/compiler/rustc_windows_rc/Cargo.toml b/compiler/rustc_windows_rc/Cargo.toml
new file mode 100644
index 00000000000..080acd35c38
--- /dev/null
+++ b/compiler/rustc_windows_rc/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "rustc_windows_rc"
+version = "0.0.0"
+edition = "2024"
+
+[dependencies]
+#tidy-alphabetical-start
+# `cc` updates often break things, so we pin it here. Cargo enforces "max 1 semver-compat version
+# per crate", so if you change this, you need to also change it in `rustc_llvm` and `rustc_codegen_ssa`.
+cc = "=1.2.16"
+#tidy-alphabetical-end
diff --git a/compiler/rustc_windows_rc/rustc.rc.in b/compiler/rustc_windows_rc/rustc.rc.in
new file mode 100644
index 00000000000..10a00b9bd4e
--- /dev/null
+++ b/compiler/rustc_windows_rc/rustc.rc.in
@@ -0,0 +1,40 @@
+// A template for the rustc_driver and rustc Windows resource files.
+// This file is processed by the build script to produce rustc.rc and rustc_driver.rc
+// with the appropriate version information filled in.
+
+// All the strings are in UTF-8
+#pragma code_page(65001)
+
+#define RUSTC_FILEDESCRIPTION_STR "@RUSTC_FILEDESCRIPTION_STR@"
+#define RUSTC_FILETYPE @RUSTC_FILETYPE@
+#define RUSTC_FILEVERSION_QUAD @RUSTC_FILEVERSION_QUAD@
+#define RUSTC_FILEVERSION_STR "@RUSTC_FILEVERSION_STR@"
+
+#define RUSTC_PRODUCTNAME_STR "@RUSTC_PRODUCTNAME_STR@"
+#define RUSTC_PRODUCTVERSION_QUAD @RUSTC_PRODUCTVERSION_QUAD@
+#define RUSTC_PRODUCTVERSION_STR "@RUSTC_PRODUCTVERSION_STR@"
+
+
+1 VERSIONINFO
+FILEVERSION RUSTC_FILEVERSION_QUAD
+PRODUCTVERSION RUSTC_PRODUCTVERSION_QUAD
+FILEOS  0x00040004
+FILETYPE RUSTC_FILETYPE
+FILESUBTYPE 0
+FILEFLAGSMASK 0x3f
+FILEFLAGS 0x0
+{
+    BLOCK "StringFileInfo"
+    {
+        BLOCK "000004b0"
+        {
+            VALUE "FileDescription", RUSTC_FILEDESCRIPTION_STR
+            VALUE "FileVersion", RUSTC_FILEVERSION_STR
+            VALUE "ProductVersion", RUSTC_PRODUCTVERSION_STR
+            VALUE "ProductName", RUSTC_PRODUCTNAME_STR
+        }
+    }
+    BLOCK "VarFileInfo" {
+        VALUE "Translation", 0x0, 0x04b0
+    }
+}
diff --git a/compiler/rustc_windows_rc/src/lib.rs b/compiler/rustc_windows_rc/src/lib.rs
new file mode 100644
index 00000000000..caa5e5ef276
--- /dev/null
+++ b/compiler/rustc_windows_rc/src/lib.rs
@@ -0,0 +1,158 @@
+//! A build script dependency to create a Windows resource file for the compiler
+//!
+//! Uses values from the `CFG_VERSION` and `CFG_RELEASE` environment variables
+//! to set the product and file version information in the Windows resource file.
+use std::{env, ffi, fs, path, process};
+
+use cc::windows_registry;
+
+/// The template for the Windows resource file.
+const RESOURCE_TEMPLATE: &str = include_str!("../rustc.rc.in");
+
+/// A subset of the possible values for the `FILETYPE` field in a Windows resource file
+///
+/// See the `dwFileType` member of [VS_FIXEDFILEINFO](https://learn.microsoft.com/en-us/windows/win32/api/verrsrc/ns-verrsrc-vs_fixedfileinfo#members)
+#[derive(Debug, Clone, Copy)]
+#[repr(u32)]
+pub enum VersionInfoFileType {
+    /// `VFT_APP` - The file is an application.
+    App = 0x00000001,
+    /// `VFT_DLL` - The file is a dynamic link library.
+    Dll = 0x00000002,
+}
+
+/// Create and compile a Windows resource file with the product and file version information for the rust compiler.
+///
+/// Returns the path to the compiled resource file
+///
+/// Does not emit any cargo directives, the caller is responsible for that.
+pub fn compile_windows_resource_file(
+    file_stem: &path::Path,
+    file_description: &str,
+    filetype: VersionInfoFileType,
+) -> path::PathBuf {
+    let mut resources_dir = path::PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    resources_dir.push("resources");
+    fs::create_dir_all(&resources_dir).unwrap();
+
+    let resource_compiler =
+        find_resource_compiler(&env::var("CARGO_CFG_TARGET_ARCH").unwrap()).expect("found rc.exe");
+
+    let rc_path = resources_dir.join(file_stem.with_extension("rc"));
+
+    write_resource_script_file(&rc_path, file_description, filetype);
+
+    let res_path = resources_dir.join(file_stem.with_extension("res"));
+
+    let status = process::Command::new(resource_compiler)
+        .arg("/fo")
+        .arg(&res_path)
+        .arg(&rc_path)
+        .status()
+        .expect("can execute resource compiler");
+    assert!(status.success(), "rc.exe failed with status {}", status);
+    assert!(
+        res_path.try_exists().unwrap_or(false),
+        "resource file {} was not created",
+        res_path.display()
+    );
+    res_path
+}
+
+/// Writes a Windows resource script file for the rust compiler with the product and file version information
+/// into `rc_path`
+fn write_resource_script_file(
+    rc_path: &path::Path,
+    file_description: &str,
+    filetype: VersionInfoFileType,
+) {
+    let mut resource_script = RESOURCE_TEMPLATE.to_string();
+
+    // Set the string product and file version to the same thing as `rustc --version`
+    let descriptive_version = env::var("CFG_VERSION").unwrap_or("unknown".to_string());
+
+    // Set the product name to "Rust Compiler" or "Rust Compiler (nightly)" etc
+    let product_name = product_name(env::var("CFG_RELEASE_CHANNEL").unwrap());
+
+    // For the numeric version we need `major,minor,patch,build`.
+    // Extract them from `CFG_RELEASE` which is "major.minor.patch" and a "-dev", "-nightly" or similar suffix
+    let cfg_release = env::var("CFG_RELEASE").unwrap();
+    // remove the suffix, if present and parse into [`ResourceVersion`]
+    let version = parse_version(cfg_release.split("-").next().unwrap_or("0.0.0"))
+        .expect("valid CFG_RELEASE version");
+
+    resource_script = resource_script
+        .replace("@RUSTC_FILEDESCRIPTION_STR@", file_description)
+        .replace("@RUSTC_FILETYPE@", &format!("{}", filetype as u32))
+        .replace("@RUSTC_FILEVERSION_QUAD@", &version.to_quad_string())
+        .replace("@RUSTC_FILEVERSION_STR@", &descriptive_version)
+        .replace("@RUSTC_PRODUCTNAME_STR@", &product_name)
+        .replace("@RUSTC_PRODUCTVERSION_QUAD@", &version.to_quad_string())
+        .replace("@RUSTC_PRODUCTVERSION_STR@", &descriptive_version);
+
+    fs::write(&rc_path, resource_script)
+        .unwrap_or_else(|_| panic!("failed to write resource file {}", rc_path.display()));
+}
+
+fn product_name(channel: String) -> String {
+    format!(
+        "Rust Compiler{}",
+        if channel == "stable" { "".to_string() } else { format!(" ({})", channel) }
+    )
+}
+
+/// Windows resources store versions as four 16-bit integers.
+struct ResourceVersion {
+    major: u16,
+    minor: u16,
+    patch: u16,
+    build: u16,
+}
+
+impl ResourceVersion {
+    /// Format the version as a comma-separated string of four integers
+    /// as expected by Windows resource scripts for the `FILEVERSION` and `PRODUCTVERSION` fields.
+    fn to_quad_string(&self) -> String {
+        format!("{},{},{},{}", self.major, self.minor, self.patch, self.build)
+    }
+}
+
+/// Parse a string in the format "major.minor.patch" into a [`ResourceVersion`].
+/// The build is set to 0.
+/// Returns `None` if the version string is not in the expected format.
+fn parse_version(version: &str) -> Option<ResourceVersion> {
+    let mut parts = version.split('.');
+    let major = parts.next()?.parse::<u16>().ok()?;
+    let minor = parts.next()?.parse::<u16>().ok()?;
+    let patch = parts.next()?.parse::<u16>().ok()?;
+    if parts.next().is_some() {
+        None
+    } else {
+        Some(ResourceVersion { major, minor, patch, build: 0 })
+    }
+}
+
+/// Find the Windows SDK resource compiler `rc.exe` for the given architecture or target triple.
+/// Returns `None` if the tool could not be found.
+fn find_resource_compiler(arch_or_target: &str) -> Option<path::PathBuf> {
+    find_windows_sdk_tool(arch_or_target, "rc.exe")
+}
+
+/// Find a Windows SDK tool for the given architecture or target triple.
+/// Returns `None` if the tool could not be found.
+fn find_windows_sdk_tool(arch_or_target: &str, tool_name: &str) -> Option<path::PathBuf> {
+    // windows_registry::find_tool can only find MSVC tools, not Windows SDK tools, but
+    // cc does include the Windows SDK tools in the PATH environment of MSVC tools.
+
+    let msvc_linker = windows_registry::find_tool(arch_or_target, "link.exe")?;
+    let path = &msvc_linker.env().iter().find(|(k, _)| k == "PATH")?.1;
+    find_tool_in_path(tool_name, path)
+}
+
+/// Find a tool in the directories in a given PATH-like string.
+fn find_tool_in_path<P: AsRef<ffi::OsStr>>(tool_name: &str, path: P) -> Option<path::PathBuf> {
+    env::split_paths(path.as_ref()).find_map(|p| {
+        let tool_path = p.join(tool_name);
+        if tool_path.try_exists().unwrap_or(false) { Some(tool_path) } else { None }
+    })
+}
diff --git a/src/bootstrap/src/core/builder/tests.rs b/src/bootstrap/src/core/builder/tests.rs
index b079117c5a7..9d6382cb4e3 100644
--- a/src/bootstrap/src/core/builder/tests.rs
+++ b/src/bootstrap/src/core/builder/tests.rs
@@ -1777,7 +1777,7 @@ mod snapshot {
         insta::assert_snapshot!(
             ctx.config("check")
                 .path("compiler")
-                .render_steps(), @"[check] rustc 0 <host> -> rustc 1 <host> (74 crates)");
+                .render_steps(), @"[check] rustc 0 <host> -> rustc 1 <host> (75 crates)");
     }
 
     #[test]
@@ -1803,7 +1803,7 @@ mod snapshot {
             ctx.config("check")
                 .path("compiler")
                 .stage(1)
-                .render_steps(), @"[check] rustc 0 <host> -> rustc 1 <host> (74 crates)");
+                .render_steps(), @"[check] rustc 0 <host> -> rustc 1 <host> (75 crates)");
     }
 
     #[test]
@@ -1817,7 +1817,7 @@ mod snapshot {
         [build] llvm <host>
         [build] rustc 0 <host> -> rustc 1 <host>
         [build] rustc 1 <host> -> std 1 <host>
-        [check] rustc 1 <host> -> rustc 2 <host> (74 crates)
+        [check] rustc 1 <host> -> rustc 2 <host> (75 crates)
         ");
     }
 
@@ -1833,7 +1833,7 @@ mod snapshot {
         [build] rustc 0 <host> -> rustc 1 <host>
         [build] rustc 1 <host> -> std 1 <host>
         [check] rustc 1 <host> -> std 1 <target1>
-        [check] rustc 1 <host> -> rustc 2 <target1> (74 crates)
+        [check] rustc 1 <host> -> rustc 2 <target1> (75 crates)
         [check] rustc 1 <host> -> rustc 2 <target1>
         [check] rustc 1 <host> -> Rustdoc 2 <target1>
         [check] rustc 1 <host> -> rustc_codegen_cranelift 2 <target1>
@@ -1929,7 +1929,7 @@ mod snapshot {
             ctx.config("check")
                 .paths(&["library", "compiler"])
                 .args(&args)
-                .render_steps(), @"[check] rustc 0 <host> -> rustc 1 <host> (74 crates)");
+                .render_steps(), @"[check] rustc 0 <host> -> rustc 1 <host> (75 crates)");
     }
 
     #[test]