improve: stream distrobuilder output to build logs in real-time

Added on_output callback to _run_doas_command so build logs update
live during the distrobuilder process instead of only after completion.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

admin_panel/api/apps.py

@@ -452,18 +452,11 @@ def _build_image_job(build_id, app_name, version, target_server, server_url, rel
 		)
 		cmd = ["doas", "sh", "-c", shell_cmd]
 
-		returncode, output = _run_doas_command(cmd, doas_password, timeout=600)
+		# Stream output to cache in real-time
+		def on_build_output(line):
+			_append_build_log(build_id, line)
 
-		# Parse output, skip password prompt lines
-		output_lines = []
-		for line in output.split("\n"):
-			stripped = line.strip()
-			if not stripped or "password" in stripped.lower():
-				continue
-			output_lines.append(stripped)
-
-		if output_lines:
-			_append_build_log(build_id, *output_lines)
+		returncode, output = _run_doas_command(cmd, doas_password, timeout=600, on_output=on_build_output)
 
 		if returncode != 0:
 			_append_build_log(build_id, "✗ Build failed")

admin_panel/api/servers.py

@@ -365,8 +365,12 @@ def get_setup_status():
 	return status
 
 
-def _run_doas_command(cmd, doas_password, timeout=120):
-	"""Run a command with doas using pty.fork() for a real controlling terminal."""
+def _run_doas_command(cmd, doas_password, timeout=120, on_output=None):
+	"""Run a command with doas using pty.fork() for a real controlling terminal.
+
+	Args:
+		on_output: Optional callback(line: str) called for each line of output in real-time.
+	"""
 	import pty
 	import select
 
@@ -379,9 +383,22 @@ def _run_doas_command(cmd, doas_password, timeout=120):
 
 	# Parent process
 	output = b""
+	line_buffer = b""
 	password_sent = False
 	deadline = time.time() + timeout
 
+	def _process_lines(data):
+		"""Process buffered data into lines and call on_output callback."""
+		nonlocal line_buffer
+		if not on_output:
+			return
+		line_buffer += data
+		while b"\n" in line_buffer:
+			line, line_buffer = line_buffer.split(b"\n", 1)
+			text = line.decode("utf-8", errors="replace").strip()
+			if text and "password" not in text.lower():
+				on_output(text)
+
 	try:
 		while time.time() < deadline:
 			ready, _, _ = select.select([master_fd], [], [], 1)
@@ -391,6 +408,7 @@ def _run_doas_command(cmd, doas_password, timeout=120):
 					if not chunk:
 						break
 					output += chunk
+					_process_lines(chunk)
 					if not password_sent and b"password" in output.lower():
 						time.sleep(0.1)
 						os.write(master_fd, (doas_password + "\n").encode())
@@ -409,15 +427,28 @@ def _run_doas_command(cmd, doas_password, timeout=120):
 								d = os.read(master_fd, 4096)
 								if d:
 									output += d
+									_process_lines(d)
 								else:
 									break
 							except OSError:
 								break
 						else:
 							break
+					# Flush remaining line buffer
+					if on_output and line_buffer:
+						text = line_buffer.decode("utf-8", errors="replace").strip()
+						if text and "password" not in text.lower():
+							on_output(text)
+						line_buffer = b""
 					rc = os.WEXITSTATUS(result[1]) if os.WIFEXITED(result[1]) else 1
 					return rc, output.decode("utf-8", errors="replace")
 
+		# Flush remaining line buffer
+		if on_output and line_buffer:
+			text = line_buffer.decode("utf-8", errors="replace").strip()
+			if text and "password" not in text.lower():
+				on_output(text)
+
 		# Final wait
 		_, status = os.waitpid(pid, 0)
 		rc = os.WEXITSTATUS(status) if os.WIFEXITED(status) else 1