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#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2024, Google Inc.
#
# Author: Stefan Klug <stefan.klug@ideasonboard.com>
#
# This script looks for occurrences of the debug metadata controls in the source
# tree and updates src/libcamera/control_ids_debug.yaml accordingly. It is meant
# to be used during development to ease updating of the yaml file while
# debugging.
import argparse
import logging
import os
import re
import sys
from dataclasses import dataclass
from pathlib import Path
logger = logging.getLogger(__name__)
logging.basicConfig(level=logging.INFO, format='%(levelname)s: %(message)s')
try:
import ruamel.yaml as ruyaml
except:
logger.error(
f'Failed to import ruamel.yaml. Please install the ruamel.yaml package.')
sys.exit(1)
@dataclass
class FoundMatch:
file: os.PathLike
whole_match: str
line: int
type: str
name: str
size: str = None
def get_control_name(control):
k = list(control.keys())
if len(k) != 1:
raise Exception(f"Can't handle control entry with {len(k)} keys")
return k[0]
def find_debug_controls(dir):
extensions = ['.cpp', '.h']
files = [p for p in dir.rglob('*') if p.suffix in extensions]
# The following regex was tested on
# set<Span<type>>( controls::debug::something , static_cast<type>(var) )
# set<>( controls::debug::something , static_cast<type>(var) )
# set( controls::debug::something , static_cast<type> (var) )
exp = re.compile(r'set' # set function
r'(?:\<((?:[^)(])*)\>)?' # followed by a optional template param
r'\(\s*controls::debug::(\w+)\s*,' # referencing a debug control
)
matches = []
for p in files:
with p.open('r') as f:
for idx, line in enumerate(f):
match = exp.search(line)
if match:
m = FoundMatch(file=p, line=idx, type=match.group(1),
name=match.group(2), whole_match=match.group(0))
if m.type is not None and m.type.startswith('Span'):
# Simple span type detection treating the last word
# inside <> as type.
r = re.match(r'Span<(?:.*\s+)(.*)>', m.type)
m.type = r.group(1)
m.size = '[n]'
matches.append(m)
return matches
def main(argv):
parser = argparse.ArgumentParser(
description='Automatically updates control_ids_debug.yaml')
parser.parse_args(argv[1:])
yaml = ruyaml.YAML()
root_dir = Path(__file__).resolve().parent.parent
ctrl_file = root_dir.joinpath('src/libcamera/control_ids_debug.yaml')
matches = find_debug_controls(root_dir.joinpath('src'))
doc = yaml.load(ctrl_file)
controls = doc['controls']
# Create a map of names in the existing yaml for easier updating.
controls_map = {}
for control in controls:
for k, v in control.items():
controls_map[k] = v
obsolete_names = list(controls_map.keys())
for m in matches:
if not m.type:
p = m.file.relative_to(Path.cwd(), walk_up=True)
logger.warning(
f'{p}:{m.line + 1}: Failed to deduce type from {m.whole_match} ... skipping')
continue
p = m.file.relative_to(root_dir)
desc = {'type': m.type,
'description': f'Debug control {m.name} found in {p}:{m.line}'}
if m.size is not None:
desc['size'] = m.size
if m.name in controls_map:
# Can't use == for modified check because of the special yaml dicts.
update_needed = False
if list(controls_map[m.name].keys()) != list(desc.keys()):
update_needed = True
else:
for k, v in controls_map[m.name].items():
if v != desc[k]:
update_needed = True
break
if update_needed:
logger.info(f"Update control '{m.name}'")
controls_map[m.name].clear()
controls_map[m.name].update(desc)
obsolete_names.remove(m.name)
else:
logger.info(f"Add control '{m.name}'")
insert_before = len(controls)
for idx, control in enumerate(controls):
if get_control_name(control).lower() > m.name.lower():
insert_before = idx
break
controls.insert(insert_before, {m.name: desc})
# Remove elements from controls without recreating the list (to keep
# comments etc.).
idx = 0
while idx < len(controls):
name = get_control_name(controls[idx])
if name in obsolete_names:
logger.info(f"Remove control '{name}'")
controls.pop(idx)
else:
idx += 1
with ctrl_file.open('w') as f:
# Ruyaml looses the header.
f.write(("# SPDX-License-Identifier: LGPL-2.1-or-later\n"
"#\n"
"# This file was generated by utils/gen-debug-controls.py\n"
"#\n"))
yaml.dump(doc, f)
return 0
if __name__ == '__main__':
sys.exit(main(sys.argv))
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