SapiensAnatis commented on issue #1452:
URL: https://github.com/apache/maven-mvnd/issues/1452#issuecomment-3394945697
In an attempt to be helpful I thought I would look at the code and see what
I could find, I could be completely wrong but I suspect the cause may be
sending an EOF before sending the text in
`TerminalInputHandler::handleProjectInput`. I made this change to add some
debug logging and move the EOF to after the response:
```patch
index c4071cbe..74f0aa62 100644
---
a/common/src/main/java/org/mvndaemon/mvnd/common/logging/TerminalInputHandler.java
+++
b/common/src/main/java/org/mvndaemon/mvnd/common/logging/TerminalInputHandler.java
@@ -127,6 +127,8 @@ public class TerminalInputHandler implements
AutoCloseable {
}
private void handleProjectInput(String projectId, int bytesToRead)
throws IOException {
+ System.err.println("Project " + projectId + " requests to read " +
bytesToRead + " bytes.");
+
if (daemonReceive == null) {
return;
}
@@ -138,17 +140,22 @@ public class TerminalInputHandler implements
AutoCloseable {
int c = terminal.reader().read(timeout);
if (c < 0) {
// End of stream reached
- daemonReceive.accept(Message.inputEof());
+ System.out.println("Reached end of stream");
break;
}
+
+ System.out.println("Read character: " + (char)c);
buf[idx++] = (char) c;
timeout = idx > 0 ? 1 : 10; // Shorter timeout after first char
}
if (idx > 0) {
String data = String.valueOf(buf, 0, idx);
+ System.out.println("Sending response: " + data);
daemonReceive.accept(Message.inputResponse(data));
}
+
+ daemonReceive.accept(Message.inputEof());
}
private void handleControlKeys() throws IOException {
```
then my example sort of works, but I have to remove my call to
`System.in.available()`. It comes through like this:
```
[INFO] --- hello:1.0-SNAPSHOT:sayhi (default-cli) @ hello-maven-plugin ---
Project hello-maven-plugin requests to read 16384 bytes.
Read character: H
Read character: e
Read character: l
Read character: l
Read character: o
Reached end of stream
Sending response: Hello
Project hello-maven-plugin requests to read 16379 bytes.
Reached end of stream
[INFO] [stdout] Read 5 bytes from stdin.
[INFO] [stdout] Stdin content: "Hello"
```
If I keep the `System.in.available()` it seems like that comes through as a
request to read 1 byte, which breaks under both master and my change:
```
[INFO] --- hello:1.0-SNAPSHOT:sayhi (default-cli) @ hello-maven-plugin ---
Project hello-maven-plugin requests to read 1 bytes.
Read character: H
Sending response: H
[INFO] [stdout] Available bytes: 0
Project hello-maven-plugin requests to read 16383 bytes.
[INFO] [stdout] Read 1 bytes from stdin.
[INFO] [stdout] Stdin content: "H"
[INFO]
----------------------------------------------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO]
----------------------------------------------------------------------------------------------------------------
[INFO] Total time: 0.044 s (Wall Clock)
[INFO] Finished at: 2025-10-12T18:05:50+01:00
[INFO]
----------------------------------------------------------------------------------------------------------------
Read character: e
Read character: l
Read character: l
Read character: o
Reached end of stream
Sending response: ello
```
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