1411c79aef
Functions in filters did not work properly except when used in the last (or only) filter. The problem was caused by the peculiarity of the `lambda` behavior in Python — any variables from the outer scope are captured only by reference, therefore any subsequent reassignment of those variables is propagated to all lambdas created earlier in the same scope. Together with the laziness of `filter()` (it returns an iterator which performs filtering on demand) this resulted in all function filters using the values of the `key` and `value` variables which correspond to the last filter in the sequence, therefore the result of filtering was wrong if some filter with a function was not the last one in the sequence. Apparently the shortest way to make a Python lambda capture some variables by value is to add arguments with default values for such variables (default values are evaluated when the lambda is created, and any subsequent reassignments in the outer scope no longer changes them). This makes filters with functions work properly even when such filters are not at the last position in the sequence.
126 lines
5.0 KiB
Python
126 lines
5.0 KiB
Python
"""Functions for searching through QMK keyboards and keymaps.
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"""
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import contextlib
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import fnmatch
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import logging
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import multiprocessing
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import re
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from dotty_dict import dotty
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from milc import cli
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from qmk.info import keymap_json
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import qmk.keyboard
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import qmk.keymap
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def _set_log_level(level):
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cli.acquire_lock()
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old = cli.log_level
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cli.log_level = level
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cli.log.setLevel(level)
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logging.root.setLevel(level)
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cli.release_lock()
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return old
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@contextlib.contextmanager
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def ignore_logging():
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old = _set_log_level(logging.CRITICAL)
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yield
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_set_log_level(old)
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def _all_keymaps(keyboard):
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with ignore_logging():
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return (keyboard, qmk.keymap.list_keymaps(keyboard))
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def _keymap_exists(keyboard, keymap):
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with ignore_logging():
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return keyboard if qmk.keymap.locate_keymap(keyboard, keymap) is not None else None
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def _load_keymap_info(keyboard, keymap):
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with ignore_logging():
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return (keyboard, keymap, keymap_json(keyboard, keymap))
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def search_keymap_targets(keymap='default', filters=[], print_vals=[]):
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targets = []
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with multiprocessing.Pool() as pool:
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cli.log.info(f'Retrieving list of keyboards with keymap "{keymap}"...')
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target_list = []
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if keymap == 'all':
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kb_to_kms = pool.map(_all_keymaps, qmk.keyboard.list_keyboards())
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for targets in kb_to_kms:
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keyboard = targets[0]
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keymaps = targets[1]
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target_list.extend([(keyboard, keymap) for keymap in keymaps])
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else:
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target_list = [(kb, keymap) for kb in filter(lambda kb: kb is not None, pool.starmap(_keymap_exists, [(kb, keymap) for kb in qmk.keyboard.list_keyboards()]))]
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if len(filters) == 0:
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targets = [(kb, km, {}) for kb, km in target_list]
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else:
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cli.log.info('Parsing data for all matching keyboard/keymap combinations...')
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valid_keymaps = [(e[0], e[1], dotty(e[2])) for e in pool.starmap(_load_keymap_info, target_list)]
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function_re = re.compile(r'^(?P<function>[a-zA-Z]+)\((?P<key>[a-zA-Z0-9_\.]+)(,\s*(?P<value>[^#]+))?\)$')
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equals_re = re.compile(r'^(?P<key>[a-zA-Z0-9_\.]+)\s*=\s*(?P<value>[^#]+)$')
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for filter_expr in filters:
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function_match = function_re.match(filter_expr)
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equals_match = equals_re.match(filter_expr)
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if function_match is not None:
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func_name = function_match.group('function').lower()
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key = function_match.group('key')
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value = function_match.group('value')
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if value is not None:
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if func_name == 'length':
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valid_keymaps = filter(lambda e, key=key, value=value: key in e[2] and len(e[2].get(key)) == int(value), valid_keymaps)
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elif func_name == 'contains':
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valid_keymaps = filter(lambda e, key=key, value=value: key in e[2] and value in e[2].get(key), valid_keymaps)
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else:
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cli.log.warning(f'Unrecognized filter expression: {function_match.group(0)}')
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continue
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cli.log.info(f'Filtering on condition: {{fg_green}}{func_name}{{fg_reset}}({{fg_cyan}}{key}{{fg_reset}}, {{fg_cyan}}{value}{{fg_reset}})...')
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else:
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if func_name == 'exists':
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valid_keymaps = filter(lambda e, key=key: key in e[2], valid_keymaps)
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elif func_name == 'absent':
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valid_keymaps = filter(lambda e, key=key: key not in e[2], valid_keymaps)
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else:
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cli.log.warning(f'Unrecognized filter expression: {function_match.group(0)}')
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continue
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cli.log.info(f'Filtering on condition: {{fg_green}}{func_name}{{fg_reset}}({{fg_cyan}}{key}{{fg_reset}})...')
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elif equals_match is not None:
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key = equals_match.group('key')
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value = equals_match.group('value')
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cli.log.info(f'Filtering on condition: {{fg_cyan}}{key}{{fg_reset}} == {{fg_cyan}}{value}{{fg_reset}}...')
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def _make_filter(k, v):
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expr = fnmatch.translate(v)
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rule = re.compile(f'^{expr}$', re.IGNORECASE)
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def f(e):
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lhs = e[2].get(k)
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lhs = str(False if lhs is None else lhs)
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return rule.search(lhs) is not None
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return f
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valid_keymaps = filter(_make_filter(key, value), valid_keymaps)
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else:
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cli.log.warning(f'Unrecognized filter expression: {filter_expr}')
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continue
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targets = [(e[0], e[1], [(p, e[2].get(p)) for p in print_vals]) for e in valid_keymaps]
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return targets
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