clang_compilation_database.py 文件源码

def write_compilation_database(ctx):
    "Write the clang compilation database as JSON"
    database_file = ctx.bldnode.make_node('compile_commands.json')
    Logs.info("Build commands will be stored in %s" % database_file.path_from(ctx.path))
    try:
        root = json.load(database_file)
    except IOError:
        root = []
    clang_db = dict((x["file"], x) for x in root)
    for task in getattr(ctx, 'clang_compilation_database_tasks', []):
        try:
            cmd = task.last_cmd
        except AttributeError:
            continue
        directory = getattr(task, 'cwd', ctx.variant_dir)
        f_node = task.inputs[0]
        filename = os.path.relpath(f_node.abspath(), directory)
        cmd = " ".join(map(quote, cmd))
        entry = {
            "directory": directory,
            "command": cmd,
            "file": filename,
        }
        clang_db[filename] = entry
    root = list(clang_db.values())
    database_file.write(json.dumps(root, indent=2))