fix(desktop): restore Windows canary builds (#2017)

tools/ci/src/desktop.rs

@@ -897,10 +897,32 @@ fn apt_get(args: &[&str]) -> Result<()> {
 }
 
 fn install_msvc_arm64_tools_step() -> Result<()> {
-    let installer =
-        Path::new(r"C:\Program Files (x86)\Microsoft Visual Studio\Installer\setup.exe");
-    let install_path = Path::new(r"C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools");
-    run_command(CommandSpec::new(installer).args([
+    let program_files_x86 = env::var_os("ProgramFiles(x86)")
+        .map(PathBuf::from)
+        .ok_or_else(|| anyhow!("ProgramFiles(x86) is not set on the Windows runner"))?;
+    let installer_dir = program_files_x86
+        .join("Microsoft Visual Studio")
+        .join("Installer");
+    let installer = installer_dir.join("setup.exe");
+    let vswhere = installer_dir.join("vswhere.exe");
+    ensure!(
+        vswhere.is_file(),
+        "Visual Studio locator not found: {}",
+        vswhere.display()
+    );
+
+    let install_path = resolve_visual_studio_install_path(&vswhere)?;
+    if let Some(linker) = find_msvc_arm64_linker(&install_path)? {
+        println!("ARM64 cross link.exe: {}", linker.display());
+        return Ok(());
+    }
+    ensure!(
+        installer.is_file(),
+        "Visual Studio installer not found: {}",
+        installer.display()
+    );
+
+    run_command(CommandSpec::new(&installer).args([
         "modify",
         "--installPath",
         install_path.to_string_lossy().as_ref(),
@@ -924,30 +946,66 @@ fn install_msvc_arm64_tools_step() -> Result<()> {
         "VS installer did not finish within the timeout."
     );
 
-    let mut found = false;
+    let linker = find_msvc_arm64_linker(&install_path)?.ok_or_else(|| {
+        anyhow!(
+            "ARM64 cross-build tools were not installed under {}\\VC\\Tools\\MSVC\\*\\bin\\HostX64\\arm64",
+            install_path.display()
+        )
+    })?;
+    println!("ARM64 cross link.exe: {}", linker.display());
+    Ok(())
+}
+
+fn resolve_visual_studio_install_path(vswhere: &Path) -> Result<PathBuf> {
+    let output = output_text(CommandSpec::new(vswhere).args([
+        "-products",
+        "*",
+        "-latest",
+        "-prerelease",
+        "-property",
+        "installationPath",
+    ]))?;
+    let paths = output
+        .lines()
+        .map(str::trim)
+        .filter(|line| !line.is_empty())
+        .collect::<Vec<_>>();
+    ensure!(
+        paths.len() == 1,
+        "vswhere returned {} Visual Studio installation paths; expected exactly one",
+        paths.len()
+    );
+    let install_path = PathBuf::from(paths[0]);
+    ensure!(
+        install_path.is_dir(),
+        "vswhere returned a missing Visual Studio installation: {}",
+        install_path.display()
+    );
+    println!("Visual Studio installation: {}", install_path.display());
+    Ok(install_path)
+}
+
+fn find_msvc_arm64_linker(install_path: &Path) -> Result<Option<PathBuf>> {
     let msvc_root = install_path.join("VC").join("Tools").join("MSVC");
-    if msvc_root.exists() {
-        for entry in fs::read_dir(&msvc_root)
-            .with_context(|| format!("Failed to read {}", msvc_root.display()))?
-        {
-            let candidate = entry?
-                .path()
-                .join("bin")
-                .join("HostX64")
-                .join("arm64")
-                .join("link.exe");
-            if candidate.exists() {
-                println!("ARM64 cross link.exe: {}", candidate.display());
-                found = true;
-            }
+    if !msvc_root.is_dir() {
+        return Ok(None);
+    }
+    let mut linkers = Vec::new();
+    for entry in fs::read_dir(&msvc_root)
+        .with_context(|| format!("Failed to read {}", msvc_root.display()))?
+    {
+        let candidate = entry?
+            .path()
+            .join("bin")
+            .join("HostX64")
+            .join("arm64")
+            .join("link.exe");
+        if candidate.is_file() {
+            linkers.push(candidate);
         }
     }
-    ensure!(
-        found,
-        "ARM64 cross-build tools were not installed under {}\\*\\bin\\HostX64\\arm64.",
-        msvc_root.display()
-    );
-    Ok(())
+    linkers.sort();
+    Ok(linkers.pop())
 }
 
 fn windows_installer_process_running() -> Result<bool> {
@@ -1823,7 +1881,16 @@ fn create_portable_zip_windows_step() -> Result<()> {
 }
 
 const FLUXER_WINDOWS_SIGNER_COMMON_NAME: &str = "Fluxer Platform AB";
-const THIRD_PARTY_PUBLISHER_ALLOWLIST: &[&str] = &[];
+const THIRD_PARTY_WINDOWS_SIGNATURE_ALLOWLIST: &[(&str, &str)] = &[
+    (
+        "d3dcompiler_47.dll",
+        "CN=Microsoft Windows, O=Microsoft Corporation, L=Redmond, S=Washington, C=US",
+    ),
+    (
+        "dxil.dll",
+        "CN=Microsoft Windows, O=Microsoft Corporation, L=Redmond, S=Washington, C=US",
+    ),
+];
 const KNOWN_OPTIONAL_WINDOWS_PE_INVENTORY: &[&str] = &["fluxer-vulkan-layer.win32-ia32-msvc.dll"];
 const WINDOWS_NATIVE_ADDON_STEMS: &[&str] = &[
     "hardware-encoder",
@@ -2144,7 +2211,7 @@ fn assert_fluxer_signed(row: &SignatureRow) -> Result<()> {
     Ok(())
 }
 
-fn assert_third_party_signed(row: &SignatureRow) -> Result<()> {
+fn assert_third_party_signed(row: &SignatureRow, relative: &str) -> Result<()> {
     ensure!(
         row.status == "Valid",
         "Authenticode status is {} (expected Valid)",
@@ -2154,11 +2221,13 @@ fn assert_third_party_signed(row: &SignatureRow) -> Result<()> {
         .subject
         .as_deref()
         .ok_or_else(|| anyhow!("Authenticode signature has no signer certificate subject"))?;
-    let common_name = certificate_common_name(subject)
-        .ok_or_else(|| anyhow!("Signer subject has no CN= component: {subject}"))?;
     ensure!(
-        THIRD_PARTY_PUBLISHER_ALLOWLIST.contains(&common_name),
-        "Signer CN '{common_name}' is not an allowlisted third-party publisher"
+        THIRD_PARTY_WINDOWS_SIGNATURE_ALLOWLIST
+            .iter()
+            .any(|(allowed_path, allowed_subject)| {
+                relative.eq_ignore_ascii_case(allowed_path) && subject == *allowed_subject
+            }),
+        "Signer subject '{subject}' is not allowlisted for {relative}"
     );
     ensure!(
         row.ts_subject.is_some(),
@@ -2167,10 +2236,10 @@ fn assert_third_party_signed(row: &SignatureRow) -> Result<()> {
     Ok(())
 }
 
-fn assert_signed_by_known_publisher(row: &SignatureRow) -> Result<()> {
+fn assert_signed_by_known_publisher(row: &SignatureRow, relative: &str) -> Result<()> {
     match assert_fluxer_signed(row) {
         Ok(()) => Ok(()),
-        Err(fluxer_error) => assert_third_party_signed(row)
+        Err(fluxer_error) => assert_third_party_signed(row, relative)
             .map_err(|third_party_error| anyhow!("{fluxer_error}; {third_party_error}")),
     }
 }
@@ -2333,22 +2402,20 @@ fn verify_windows_pe_signatures(
             ));
             continue;
         };
-        if let Err(error) = assert_signed_by_known_publisher(row) {
+        if let Err(error) = assert_signed_by_known_publisher(row, &relative) {
             failures.push(format!("{relative}: {error}"));
         }
     }
     ensure!(
         failures.is_empty(),
-        "{label}: {} of {} Windows binaries are not signed by '{}':\n{}",
+        "{label}: {} of {} Windows binaries do not have an approved signature:\n{}",
         failures.len(),
         files.len(),
-        FLUXER_WINDOWS_SIGNER_COMMON_NAME,
         failures.join("\n")
     );
     println!(
-        "{label}: verified {} Windows binaries signed by '{}'.",
-        files.len(),
-        FLUXER_WINDOWS_SIGNER_COMMON_NAME
+        "{label}: verified {} Windows binary signatures.",
+        files.len()
     );
     Ok(())
 }