[PATCH v6 07/19] test: Introduce the concept of a role

[Simon Glass <sjg@chromium.org>]

In Labgrid there is the concept of a 'role', which is similar to the
U-Boot board ID in U-Boot's pytest subsystem.

The role indicates both the target and information about the U-Boot
build to use. It can also provide any amount of other configuration.
The information is obtained using the 'labgrid-client query' operation.

Make use of this in tests, so that only the role is required in gitlab
and other situations. The board type and other things can be queried
as needed.

Use a new 'u-boot-test-getrole' script to obtain the requested
information.

With this it is possible to run lab tests in gitlab with just a single
'ROLE' variable for each board.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

(no changes since v5)

Changes in v5:
- Add a few more comments
- Comment out the debugging, which might be useful later

 test/py/conftest.py | 38 ++++++++++++++++++++++++++++++++++----
 1 file changed, 34 insertions(+), 4 deletions(-)

diff --git a/test/py/conftest.py b/test/py/conftest.py
index 6547c6922c6..03dfd8ab562 100644
--- a/test/py/conftest.py
+++ b/test/py/conftest.py
@@ -23,6 +23,7 @@ from pathlib import Path
 import pytest
 import re
 from _pytest.runner import runtestprotocol
+import subprocess
 import sys
 
 # Globals: The HTML log file, and the connection to the U-Boot console.
@@ -79,6 +80,7 @@ def pytest_addoption(parser):
     parser.addoption('--gdbserver', default=None,
         help='Run sandbox under gdbserver. The argument is the channel '+
         'over which gdbserver should communicate, e.g. localhost:1234')
+    parser.addoption('--role', help='U-Boot board role (for Labgrid)')
     parser.addoption('--no-prompt-wait', default=False, action='store_true',
         help="Assume that U-Boot is ready and don't wait for a prompt")
 
@@ -130,12 +132,40 @@ def get_details(config):
             str: Build directory
             str: Source directory
     """
-    board_type = config.getoption('board_type')
-    board_identity = config.getoption('board_identity')
+    role = config.getoption('role')
+
+    # Get a few provided parameters
     build_dir = config.getoption('build_dir')
+    if role:
+        # When using a role, build_dir and build_dir_extra are normally not set,
+        # since they are picked up from Labgrid via the u-boot-test-getrole
+        # script
+        board_identity = role
+        cmd = ['u-boot-test-getrole', role, '--configure']
+        env = os.environ.copy()
+        if build_dir:
+            env['U_BOOT_BUILD_DIR'] = build_dir
+        proc = subprocess.run(cmd, capture_output=True, encoding='utf-8',
+                              env=env)
+        if proc.returncode:
+            raise ValueError(proc.stderr)
+        # For debugging
+        # print('conftest: lab:', proc.stdout)
+        vals = {}
+        for line in proc.stdout.splitlines():
+            item, value = line.split(' ', maxsplit=1)
+            k = item.split(':')[-1]
+            vals[k] = value
+        # For debugging
+        # print('conftest: lab info:', vals)
+        board_type, default_build_dir, source_dir = (vals['board'],
+            vals['build_dir'], vals['source_dir'])
+    else:
+        board_type = config.getoption('board_type')
+        board_identity = config.getoption('board_identity')
 
-    source_dir = os.path.dirname(os.path.dirname(TEST_PY_DIR))
-    default_build_dir = source_dir + '/build-' + board_type
+        source_dir = os.path.dirname(os.path.dirname(TEST_PY_DIR))
+        default_build_dir = source_dir + '/build-' + board_type
     if not build_dir:
         build_dir = default_build_dir
 
-- 
2.43.0