Revert "ci: OpenOCD class as fixture"

This reverts commit 0eb74ffcc3.

examples/system/app_trace_basic/pytest_app_trace_basic.py

@@ -1,19 +1,126 @@
 # SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: Unlicense OR CC0-1.0
+import json
+import logging
+import os
+import signal
 import time
-import typing
+from telnetlib import Telnet
+from typing import Any
+from typing import Optional
 
+import pexpect
 import pytest
+from pytest_embedded.utils import to_bytes
+from pytest_embedded.utils import to_str
 from pytest_embedded_idf import IdfDut
 from pytest_embedded_idf.utils import idf_parametrize
 
-if typing.TYPE_CHECKING:
-    from conftest import OpenOCD
+MAX_RETRIES = 3
+RETRY_DELAY = 1
+TELNET_PORT = 4444
 
 
-def _test_examples_app_trace_basic(openocd: 'OpenOCD', dut: IdfDut) -> None:
+class OpenOCD:
+    def __init__(self, dut: 'IdfDut'):
+        self.dut = dut
+        self.telnet: Optional[Telnet] = None
+        self.log_file = os.path.join(self.dut.logdir, 'ocd.txt')
+        self.proc: Optional[pexpect.spawn] = None
+
+    def run(self) -> Optional['OpenOCD']:
+        desc_path = os.path.join(self.dut.app.binary_path, 'project_description.json')
+
+        try:
+            with open(desc_path, 'r') as f:
+                project_desc = json.load(f)
+        except FileNotFoundError:
+            logging.error('Project description file not found at %s', desc_path)
+            return None
+
+        openocd_scripts = os.getenv('OPENOCD_SCRIPTS')
+        if not openocd_scripts:
+            logging.error('OPENOCD_SCRIPTS environment variable is not set.')
+            return None
+
+        debug_args = project_desc.get('debug_arguments_openocd')
+        if not debug_args:
+            logging.error("'debug_arguments_openocd' key is missing in project_description.json")
+            return None
+
+        # For debug purposes, make the value '4'
+        ocd_env = os.environ.copy()
+        ocd_env['LIBUSB_DEBUG'] = '1'
+
+        for _ in range(1, MAX_RETRIES + 1):
+            try:
+                self.proc = pexpect.spawn(
+                    command='openocd',
+                    args=['-s', openocd_scripts] + debug_args.split(),
+                    timeout=5,
+                    encoding='utf-8',
+                    codec_errors='ignore',
+                    env=ocd_env,
+                )
+                if self.proc and self.proc.isalive():
+                    self.proc.expect_exact('Info : Listening on port 3333 for gdb connections', timeout=5)
+                    return self
+            except (pexpect.exceptions.EOF, pexpect.exceptions.TIMEOUT) as e:
+                logging.error('Error running OpenOCD: %s', str(e))
+                if self.proc and self.proc.isalive():
+                    self.proc.terminate()
+            time.sleep(RETRY_DELAY)
+
+        logging.error('Failed to run OpenOCD after %d attempts.', MAX_RETRIES)
+        return None
+
+    def connect_telnet(self) -> None:
+        for attempt in range(1, MAX_RETRIES + 1):
+            try:
+                self.telnet = Telnet('127.0.0.1', TELNET_PORT, 5)
+                break
+            except ConnectionRefusedError as e:
+                logging.error('Error telnet connection: %s in attempt:%d', e, attempt)
+                time.sleep(1)
+        else:
+            raise ConnectionRefusedError
+
+    def write(self, s: str) -> Any:
+        if self.telnet is None:
+            logging.error('Telnet connection is not established.')
+            return ''
+        resp = self.telnet.read_very_eager()
+        self.telnet.write(to_bytes(s, '\n'))
+        resp += self.telnet.read_until(b'>')
+        return to_str(resp)
+
+    def apptrace_wait_stop(self, timeout: int = 30) -> None:
+        stopped = False
+        end_before = time.time() + timeout
+        while not stopped:
+            cmd_out = self.write('esp apptrace status')
+            for line in cmd_out.splitlines():
+                if line.startswith('Tracing is STOPPED.'):
+                    stopped = True
+                    break
+            if not stopped and time.time() > end_before:
+                raise pexpect.TIMEOUT('Failed to wait for apptrace stop!')
+            time.sleep(1)
+
+    def kill(self) -> None:
+        # Check if the process is still running
+        if self.proc and self.proc.isalive():
+            self.proc.terminate()
+            self.proc.kill(signal.SIGKILL)
+
+
+def _test_examples_app_trace_basic(dut: IdfDut) -> None:
     dut.expect_exact('example: Waiting for OpenOCD connection', timeout=5)
-    with openocd.run() as openocd:
+    openocd = OpenOCD(dut).run()
+    assert openocd
+    try:
+        openocd.connect_telnet()
+        openocd.write('log_output {}'.format(openocd.log_file))
         openocd.write('reset run')
         dut.expect_exact('example: Waiting for OpenOCD connection', timeout=5)
         time.sleep(1)  # wait for APPTRACE_INIT semihosting call
@@ -44,15 +151,17 @@ def _test_examples_app_trace_basic(openocd: 'OpenOCD', dut: IdfDut) -> None:
                         break
                 if found is not True:
                     raise RuntimeError('"{}" could not be found in {}'.format(log_str, 'apptrace.log'))
+    finally:
+        openocd.kill()
 
 
 @pytest.mark.jtag
 @idf_parametrize('target', ['esp32', 'esp32c2', 'esp32s2'], indirect=['target'])
-def test_examples_app_trace_basic(openocd: 'OpenOCD', dut: IdfDut) -> None:
-    _test_examples_app_trace_basic(openocd, dut)
+def test_examples_app_trace_basic(dut: IdfDut) -> None:
+    _test_examples_app_trace_basic(dut)
 
 
 @pytest.mark.usb_serial_jtag
 @idf_parametrize('target', ['esp32s3', 'esp32c3', 'esp32c5', 'esp32c6', 'esp32c61', 'esp32h2'], indirect=['target'])
-def test_examples_app_trace_basic_usj(openocd: 'OpenOCD', dut: IdfDut) -> None:
-    _test_examples_app_trace_basic(openocd, dut)
+def test_examples_app_trace_basic_usj(dut: IdfDut) -> None:
+    _test_examples_app_trace_basic(dut)