fix(sdk-java): pass custom env to CLI process

packages/sdk-java/qwencode/src/main/java/com/alibaba/qwen/code/cli/transport/process/ProcessTransport.java

@@ -16,6 +16,7 @@
 import java.io.InputStreamReader;
 import java.io.OutputStreamWriter;
 import java.lang.ProcessBuilder.Redirect;
+import java.util.Map;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeoutException;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -103,6 +104,13 @@ public void start() throws IOException {
                 .redirectErrorStream(false)
                 .directory(new File(transportOptionsAdapter.getCwd()));
 
+        Map<String, String> env = transportOptionsAdapter.getHandledTransportOptions().getEnv();
+        if (env != null) {
+            Map<String, String> processEnv = processBuilder.environment();
+            processEnv.clear();
+            processEnv.putAll(env);
+        }
+
         process = processBuilder.start();
         processInput = new BufferedWriter(new OutputStreamWriter(process.getOutputStream()));
         processOutput = new BufferedReader(new InputStreamReader(process.getInputStream()));

packages/sdk-java/qwencode/src/test/java/com/alibaba/qwen/code/cli/transport/process/ProcessTransportTest.java

@@ -1,6 +1,10 @@
 package com.alibaba.qwen.code.cli.transport.process;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Collections;
 import java.util.UUID;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeoutException;
@@ -16,12 +20,20 @@
 import com.alibaba.qwen.code.cli.transport.TransportOptions;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 class ProcessTransportTest {
 
     private static final Logger logger = LoggerFactory.getLogger(ProcessTransportTest.class);
+    private static final String CUSTOM_ENV_NAME = "QWEN_SDK_TEST_ENV";
+    private static final String CUSTOM_ENV_VALUE = "from-set-env";
+
+    @TempDir
+    Path tempDir;
 
     @Test
     void shouldStartAndCloseSuccessfully() throws IOException {
@@ -30,6 +42,21 @@ void shouldStartAndCloseSuccessfully() throws IOException {
         transport.close();
     }
 
+    @Test
+    void shouldPassCustomEnvToProcess() throws IOException {
+        Path executable = createEnvPrinter();
+        TransportOptions transportOptions = new TransportOptions()
+                .setPathToQwenExecutable(executable.toString())
+                .setEnv(Collections.singletonMap(CUSTOM_ENV_NAME, CUSTOM_ENV_VALUE));
+
+        ProcessTransport transport = new ProcessTransport(transportOptions);
+        try {
+            assertEquals(CUSTOM_ENV_VALUE, transport.processOutput.readLine());
+        } finally {
+            transport.close();
+        }
+    }
+
     @Test
     void shouldInputWaitForOneLineSuccessfully() throws IOException, ExecutionException, InterruptedException, TimeoutException {
         TransportOptions transportOptions = new TransportOptions();
@@ -84,4 +111,15 @@ void shouldSdkMessageSuccessfully() throws IOException, ExecutionException, Inte
                 line -> "result".equals(JSON.parseObject(line).getString("type")));
     }
 
+    private Path createEnvPrinter() throws IOException {
+        boolean isWindows = System.getProperty("os.name").toLowerCase().contains("win");
+        Path executable = tempDir.resolve(isWindows ? "print-env.cmd" : "print-env.sh");
+        String script = isWindows
+                ? "@echo off\r\necho %" + CUSTOM_ENV_NAME + "%\r\n"
+                : "#!/bin/sh\nprintf '%s\\n' \"$" + CUSTOM_ENV_NAME + "\"\n";
+        Files.write(executable, script.getBytes(StandardCharsets.UTF_8));
+        executable.toFile().setExecutable(true);
+        return executable;
+    }
+
 }