Generate bindings for required symbols only

Cargo.toml

@@ -27,6 +27,10 @@ windows = { version = "0.58", default-features = false, features = [
         "Win32_NetworkManagement_Ndis",
         "Win32_Networking_WinSock",
 ] }
+windows-targets = "0.52"
+
+[target."cfg(windows)".dev-dependencies]
+windows-bindgen = { version = "0.58" } # MSRV is 1.70
 
 [lints.clippy]
 cargo = { level = "warn", priority = -1 }

tests/win_bindings.rs

@@ -0,0 +1,38 @@
+#![cfg(windows)]
+
+use std::fs;
+use windows_bindgen::bindgen;
+
+#[test]
+fn gen_bindings() {
+    let existing = fs::read_to_string(TARGET).unwrap();
+    let new = windows_bindgen::bindgen([
+        "--out",
+        TARGET,
+        "--config",
+        "flatten",
+        "--filter",
+        "Windows.Win32.Foundation.NO_ERROR",
+        "Windows.Win32.NetworkManagement.IpHelper.FreeMibTable",
+        "Windows.Win32.NetworkManagement.IpHelper.GetIpInterfaceTable",
+        "Windows.Win32.NetworkManagement.IpHelper.GetUnicastIpAddressTable",
+        "Windows.Win32.NetworkManagement.IpHelper.MIB_IPINTERFACE_ROW",
+        "Windows.Win32.NetworkManagement.IpHelper.MIB_IPINTERFACE_TABLE",
+        "Windows.Win32.NetworkManagement.IpHelper.MIB_UNICASTIPADDRESS_ROW",
+        "Windows.Win32.NetworkManagement.IpHelper.MIB_UNICASTIPADDRESS_TABLE",
+        "Windows.Win32.Networking.WinSock.AF_INET",
+        "Windows.Win32.Networking.WinSock.AF_INET6",
+        "Windows.Win32.Networking.WinSock.AF_UNSPEC",
+    ])
+    .unwrap();
+
+    // Check the output is the same as before.
+    // Depending on the git configuration the file may have been checked out with `\r\n` newlines or
+    // with `\n`. Compare line-by-line to ignore this difference.
+    let new = fs::read_to_string(TARGET).unwrap();
+    if !new.lines().eq(existing.lines()) {
+        panic!("generated file `{TARGET}` is changed");
+    }
+}
+
+const TARGET: &str = "src/win_bindings.rs";