diff options
Diffstat (limited to 'lib/python/qmk/compilation_database.py')
-rwxr-xr-x | lib/python/qmk/compilation_database.py | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/lib/python/qmk/compilation_database.py b/lib/python/qmk/compilation_database.py new file mode 100755 index 0000000000..4c88dadbdd --- /dev/null +++ b/lib/python/qmk/compilation_database.py @@ -0,0 +1,137 @@ +"""Creates a compilation database for the given keyboard build. +""" + +import json +import os +import re +import shlex +import shutil +from functools import lru_cache +from pathlib import Path +from typing import Dict, Iterator, List + +from milc import cli + +from qmk.commands import find_make +from qmk.constants import QMK_FIRMWARE + + +@lru_cache(maxsize=10) +def system_libs(binary: str) -> List[Path]: + """Find the system include directory that the given build tool uses. + """ + cli.log.debug("searching for system library directory for binary: %s", binary) + + # Actually query xxxxxx-gcc to find its include paths. + if binary.endswith("gcc") or binary.endswith("g++"): + # (TODO): Remove 'stdin' once 'input' no longer causes issues under MSYS + result = cli.run([binary, '-E', '-Wp,-v', '-'], capture_output=True, check=True, stdin=None, input='\n') + paths = [] + for line in result.stderr.splitlines(): + if line.startswith(" "): + paths.append(Path(line.strip()).resolve()) + return paths + + return list(Path(binary).resolve().parent.parent.glob("*/include")) if binary else [] + + +@lru_cache(maxsize=10) +def cpu_defines(binary: str, compiler_args: str) -> List[str]: + cli.log.debug("gathering definitions for compilation: %s %s", binary, compiler_args) + if binary.endswith("gcc") or binary.endswith("g++"): + invocation = [binary, '-dM', '-E'] + if binary.endswith("gcc"): + invocation.extend(['-x', 'c']) + elif binary.endswith("g++"): + invocation.extend(['-x', 'c++']) + compiler_args = shlex.split(compiler_args) + invocation.extend(compiler_args) + invocation.append('-') + result = cli.run(invocation, capture_output=True, check=True, stdin=None, input='\n') + define_args = [] + for line in result.stdout.splitlines(): + line_args = line.split(' ', 2) + if len(line_args) == 3 and line_args[0] == '#define': + define_args.append(f'-D{line_args[1]}={line_args[2]}') + elif len(line_args) == 2 and line_args[0] == '#define': + define_args.append(f'-D{line_args[1]}') + return list(sorted(set(define_args))) + return [] + + +file_re = re.compile(r'printf "Compiling: ([^"]+)') +cmd_re = re.compile(r'LOG=\$\((.+?)&&') + + +def parse_make_n(f: Iterator[str]) -> List[Dict[str, str]]: + """parse the output of `make -n <target>` + + This function makes many assumptions about the format of your build log. + This happens to work right now for qmk. + """ + + state = 'start' + this_file = None + records = [] + for line in f: + if state == 'start': + m = file_re.search(line) + if m: + this_file = m.group(1) + state = 'cmd' + + if state == 'cmd': + assert this_file + m = cmd_re.search(line) + if m: + # we have a hit! + this_cmd = m.group(1) + args = shlex.split(this_cmd) + binary = shutil.which(args[0]) + compiler_args = set(filter(lambda x: x.startswith('-m') or x.startswith('-f'), args)) + for s in system_libs(binary): + args += ['-isystem', '%s' % s] + args.extend(cpu_defines(binary, ' '.join(shlex.quote(s) for s in compiler_args))) + new_cmd = ' '.join(shlex.quote(s) for s in args) + records.append({"directory": str(QMK_FIRMWARE.resolve()), "command": new_cmd, "file": this_file}) + state = 'start' + + return records + + +def write_compilation_database(keyboard: str = None, keymap: str = None, output_path: Path = QMK_FIRMWARE / 'compile_commands.json', skip_clean: bool = False, command: List[str] = None, **env_vars) -> bool: + # Generate the make command for a specific keyboard/keymap. + if not command: + from qmk.build_targets import KeyboardKeymapBuildTarget # Lazy load due to circular references + target = KeyboardKeymapBuildTarget(keyboard, keymap) + command = target.compile_command(dry_run=True, **env_vars) + + if not command: + cli.log.error('You must supply both `--keyboard` and `--keymap`, or be in a directory for a keyboard or keymap.') + cli.echo('usage: qmk generate-compilation-database [-kb KEYBOARD] [-km KEYMAP]') + return False + + # remove any environment variable overrides which could trip us up + env = os.environ.copy() + env.pop("MAKEFLAGS", None) + + # re-use same executable as the main make invocation (might be gmake) + if not skip_clean: + clean_command = [find_make(), "clean"] + cli.log.info('Making clean with {fg_cyan}%s', ' '.join(clean_command)) + cli.run(clean_command, capture_output=False, check=True, env=env) + + cli.log.info('Gathering build instructions from {fg_cyan}%s', ' '.join(command)) + + result = cli.run(command, capture_output=True, check=True, env=env) + db = parse_make_n(result.stdout.splitlines()) + if not db: + cli.log.error("Failed to parse output from make output:\n%s", result.stdout) + return False + + cli.log.info("Found %s compile commands", len(db)) + + cli.log.info(f"Writing build database to {output_path}") + output_path.write_text(json.dumps(db, indent=4)) + + return True |