qmk-firmware/lib/python/qmk/makefile.py

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""" Functions for working with Makefiles
"""
from pathlib import Path
from qmk.errors import NoSuchKeyboardError
def parse_rules_mk_file(file, rules_mk=None):
"""Turn a rules.mk file into a dictionary.
Args:
file: path to the rules.mk file
rules_mk: already parsed rules.mk the new file should be merged with
Returns:
a dictionary with the file's content
"""
if not rules_mk:
rules_mk = {}
file = Path(file)
if file.exists():
rules_mk_lines = file.read_text().split("\n")
for line in rules_mk_lines:
# Filter out comments
if line.strip().startswith("#"):
continue
# Strip in-line comments
if '#' in line:
line = line[:line.index('#')].strip()
if '=' in line:
# Append
if '+=' in line:
key, value = line.split('+=', 1)
if key.strip() not in rules_mk:
rules_mk[key.strip()] = value.strip()
else:
rules_mk[key.strip()] += ' ' + value.strip()
# Set if absent
elif "?=" in line:
key, value = line.split('?=', 1)
if key.strip() not in rules_mk:
rules_mk[key.strip()] = value.strip()
else:
if ":=" in line:
line.replace(":", "")
key, value = line.split('=', 1)
rules_mk[key.strip()] = value.strip()
return rules_mk
def get_rules_mk(keyboard):
""" Get a rules.mk for a keyboard
Args:
keyboard: name of the keyboard
Raises:
NoSuchKeyboardError: when the keyboard does not exists
Returns:
a dictionary with the content of the rules.mk file
"""
# Start with qmk_firmware/keyboards
kb_path = Path.cwd() / "keyboards"
# walk down the directory tree
# and collect all rules.mk files
kb_dir = kb_path / keyboard
if kb_dir.exists():
rules_mk = dict()
for directory in Path(keyboard).parts:
kb_path = kb_path / directory
rules_mk_path = kb_path / "rules.mk"
if rules_mk_path.exists():
rules_mk = parse_rules_mk_file(rules_mk_path, rules_mk)
else:
raise NoSuchKeyboardError("The requested keyboard and/or revision does not exist.")
return rules_mk