Add support for signing binaries

build.gradle

@@ -13,7 +13,7 @@ java {
 
 allprojects {
     group = "edu.wpi.first"
-    version = "2025.5.0"
+    version = "2025.6.0"
 
     if (project.hasProperty('publishVersion')) {
         version = project.publishVersion

src/main/java/edu/wpi/first/nativeutils/WPINativeUtils.java

@@ -1,9 +1,25 @@
 package edu.wpi.first.nativeutils;
 
+import java.io.IOException;
+
 import org.gradle.api.Plugin;
 import org.gradle.api.Project;
+import org.gradle.api.tasks.options.Option;
+import org.gradle.nativeplatform.tasks.AbstractLinkTask;
+import org.gradle.nativeplatform.tasks.LinkExecutable;
 
 public class WPINativeUtils implements Plugin<Project> {
+  private String developerID = null;
+
+  @Option(option = "sign", description = "Sign with developer ID (MacOS only)")
+  public void sign(String developerID) {
+    if (!System.getProperty("os.name").startsWith("Mac")) {
+      throw new RuntimeException("Can't sign binaries on non mac platforms");
+    }
+
+    this.developerID = developerID;
+  }
+
   @Override
   public void apply(Project project) {
     project.getPluginManager().apply(NativeUtils.class);
@@ -13,5 +29,29 @@ public void apply(Project project) {
     nativeExt.addWpiExtension();
 
     project.getPluginManager().apply(RpathRules.class);
-  }
+
+    if (System.getProperty("os.name").startsWith("Mac")) {
+      if (developerID != null) {
+        project.getTasks().withType(AbstractLinkTask.class).forEach((task) -> {
+              // Don't sign any executables because codesign complains
+              // about relative rpath.
+              if (!(task instanceof LinkExecutable)) {
+                // Get path to binary.
+                String path = task.getLinkedFile().getAsFile().get().getAbsolutePath();
+                ProcessBuilder builder = new ProcessBuilder();
+                var codesigncommand = String.format("codesign --force --strict --timestamp --options=runtime "
+                + "--version -s %s %s", developerID, path);
+                builder.command("sh", "-c", codesigncommand);
+                builder.directory(project.getRootDir());
+
+                try {
+                  builder.start();
+                } catch (IOException e) {
+                  throw new RuntimeException(e);
+                }
+              }
+          });
+        }
+      }
+    }
 }