possible zunit recursion fix, appit fix

Author: AdamBien

README.md

@@ -16,6 +16,17 @@ Built with pure Java 25, zb compiles and packages your project with zero externa
 - 📦 **Executable JAR generation** out of the box
 - 🎯 **One command, zero config** — sensible defaults, optional `.zb` file when you want control
 
+## Speed
+
+zb compiles, packages, and tests in seconds — no dependency resolution, no daemon, no warm-up:
+
+| Project | Build + test | Tests |
+|---------|--------------|-------|
+| [zb](https://github.com/AdamBien/zb) (builds itself) | **1.8s** | 6 unit tests |
+| [zsmith](https://github.com/AdamBien/zsmith) | **2.8s** | 19 unit tests |
+
+These are full builds — compile, package the executable JAR, **and** run the test suite — from a cold start.
+
 ## Prerequisites
 
 - Java 25 or later

src/main/java/airhacks/App.java

@@ -24,8 +24,11 @@ public interface App {
 
     String VERSION = "zb v" + readVersion();
 
-    private static String readVersion() {
+    static String readVersion() {
         try (var in = App.class.getResourceAsStream("/version.txt")) {
+            if (in == null) {
+                return "unknown";
+            }
             return new String(in.readAllBytes()).trim();
         } catch (IOException e) {
             return "unknown";

src/main/java/airhacks/zb/hook/control/PostBuildHook.java

@@ -13,6 +13,17 @@ public interface PostBuildHook {
 
     String NONE = "<none>";
 
+    /// Suppresses the hook to break recursion. A hook like `zunit` runs the test
+    /// suite, whose integration tests call `App.build`, which would fire the hook
+    /// again — unbounded recursion. Set as an env var on every hook-spawned child
+    /// (inherited by all descendants), or as a system property by in-process
+    /// callers (tests) that must build without re-triggering the hook.
+    String SKIP_MARKER = "ZB_IN_POST_BUILD_HOOK";
+
+    static boolean hookSuppressed() {
+        return Boolean.parseBoolean(System.getenv(SKIP_MARKER)) || Boolean.getBoolean(SKIP_MARKER);
+    }
+
     static Optional<String> configuredHook() {
         var hook = Configuration.POST_BUILD_HOOK.get(NONE);
         if (NONE.equals(hook) || hook.isBlank()) {
@@ -39,6 +50,7 @@ static void execute(String command, Path sourceDir, Path jarDir, String jarFileN
                     .inheritIO()
                     .directory(Path.of(".").toFile());
             var env = processBuilder.environment();
+            env.put(SKIP_MARKER, "true");
             env.put("ZB_JAR_PATH", jarDir.resolve(jarFileName).toString());
             env.put("ZB_SOURCE_DIR", sourceDir.toString());
             env.put("ZB_JAR_DIR", jarDir.toString());
@@ -59,6 +71,9 @@ static void execute(String command, Path sourceDir, Path jarDir, String jarFileN
     }
 
     static void runIfConfigured(Path sourceDir, Path jarDir, String jarFileName) {
+        if (hookSuppressed()) {
+            return;
+        }
         configuredHook().ifPresent(hook -> execute(hook, sourceDir, jarDir, jarFileName));
     }
 }

src/main/resources/version.txt

@@ -1 +1 @@
-2026.06.26.01
+2026.06.26.02

src/test/java/airhacks/AppIT.java

@@ -10,9 +10,14 @@
 import java.util.jar.JarFile;
 import java.util.jar.Manifest;
 
+import airhacks.zb.hook.control.PostBuildHook;
+
 public class AppIT {
 
     public static void main(String... args) throws IOException {
+        // AppIT exercises the build itself; the post-build hook (e.g. zunit) would
+        // recursively re-run this suite and clobber the JAR under assertion.
+        System.setProperty(PostBuildHook.SKIP_MARKER, "true");
         createZBJar();
         servicesConfigurationFileIsIncluded();
         temporaryClassesDirectoryIsDeleted();