properly generate gradle wrapper for kts tab completion

core/src/main/java/com/volmit/iris/core/project/Gradle.java

@@ -0,0 +1,104 @@
+package com.volmit.iris.core.project;
+
+import com.volmit.iris.Iris;
+import com.volmit.iris.util.io.IO;
+import org.zeroturnaround.zip.ZipUtil;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.util.HashMap;
+import java.util.Optional;
+import java.util.Scanner;
+
+public class Gradle {
+    private static final boolean WINDOWS = System.getProperty("os.name").toLowerCase().contains("win");
+    private static final String[] ENVIRONMENT = createEnvironment();
+    private static final String VERSION = "8.14.2";
+    private static final String DISTRIBUTION_URL = "https://services.gradle.org/distributions/gradle-" + VERSION + "-bin.zip";
+    private static final String HASH = IO.hash(DISTRIBUTION_URL);
+
+    public static synchronized void wrapper(File projectDir) {
+        try {
+            File settings = new File(projectDir, "settings.gradle.kts");
+            if (!settings.exists()) settings.createNewFile();
+            runGradle(projectDir, "wrapper");
+        } catch (Throwable e) {
+            Iris.error("Failed to install gradle wrapper!");
+            e.printStackTrace();
+            Iris.reportError(e);
+        }
+    }
+
+    public static void runGradle(File projectDir, String... args) throws IOException, InterruptedException {
+        File gradle = downloadGradle(false);
+        String[] cmd = new String[args.length + 1];
+        cmd[0] = gradle.getAbsolutePath();
+        System.arraycopy(args, 0, cmd, 1, args.length);
+        var process = Runtime.getRuntime().exec(cmd, ENVIRONMENT, projectDir);
+        attach(process.getInputStream());
+        attach(process.getErrorStream());
+        var code = process.waitFor();
+        if (code == 0) return;
+        throw new RuntimeException("Gradle exited with code " + code);
+    }
+
+    private static synchronized File downloadGradle(boolean force) {
+        var folder = Iris.instance.getDataFolder("cache", HASH.substring(0, 2), HASH);
+        if (force) {
+            IO.delete(folder);
+            folder.mkdirs();
+        }
+
+        var bin = new File(folder, "gradle-" + VERSION + "/bin/gradle" + (WINDOWS ? ".bat" : ""));
+        if (bin.exists()) {
+            bin.setExecutable(true);
+            return bin;
+        }
+
+        try (var input = new BufferedInputStream(URI.create(DISTRIBUTION_URL).toURL().openStream())) {
+            ZipUtil.unpack(input, folder);
+        } catch (Throwable e) {
+            throw new RuntimeException("Failed to download gradle", e);
+        }
+
+        bin.setExecutable(true);
+        return bin;
+    }
+
+    private static String[] createEnvironment() {
+        var env = new HashMap<>(System.getenv());
+        env.put("JAVA_HOME", findJavaHome());
+        return env.entrySet()
+                .stream()
+                .map(e -> e.getKey() + "=" + e.getValue())
+                .toArray(String[]::new);
+    }
+
+    private static String findJavaHome() {
+        String javaHome = System.getProperty("java.home");
+        if (javaHome != null && new File(javaHome + "/bin/java" + (WINDOWS ? ".exe" : "")).exists()) {
+            return javaHome;
+        }
+
+        return ProcessHandle.current()
+                .info()
+                .command()
+                .map(s -> new File(s).getAbsoluteFile().getParentFile().getParentFile())
+                .flatMap(f -> f.exists() ? Optional.of(f.getAbsolutePath()) : Optional.empty())
+                .orElseThrow(() -> new RuntimeException("Failed to find java home, please set java.home system property"));
+    }
+
+    private static void attach(InputStream stream) {
+        Thread.ofVirtual().start(() -> {
+            try (var in = new Scanner(stream)) {
+                while (in.hasNextLine()) {
+                    String line = in.nextLine();
+                    Iris.debug("[GRADLE] " + line);
+                }
+            }
+        });
+    }
+}

core/src/main/java/com/volmit/iris/core/project/IrisProject.java

@@ -421,6 +421,7 @@ public class IrisProject {
         if (!schemaMap.isEmpty()) {
             IO.write(schemasFile, doc);
         }
+        Gradle.wrapper(path);
 
         return ws;
     }