dbt flags 简单说明二

以前简单说过，实际上dbt 的flags 提供的参数还是不少的

参考内容

一个参考内容
可以看出还是不少信息的

flags Namespace(WRITE_JSON=True, WARN_ERROR=None, PROFILES_DIR='xxxx/.dbt', INDIRECT_SELECTION='eager', LOG_PATH='xxxxx/logs', TARGET_PATH=None, FAIL_FAST=False, USE_COLORS=True, VERSION_CHECK=True, CACHE_SELECTED_ONLY=False, WARN_ERROR_OPTIONS=WarnErrorOptions(include=[], exclude=[]), USE_EXPERIMENTAL_PARSER=False, LOG_CACHE_EVENTS=False, QUIET=False, LOG_FORMAT='default', DEBUG=False, PARTIAL_PARSE=True, INTROSPECT=True, STATIC_PARSER=True, NO_PRINT=None, PRINTER_WIDTH=80, SEND_ANONYMOUS_USAGE_STATS=True, INVOCATION_COMMAND='dbt run -s dalongv2', FULL_REFRESH=False, STORE_FAILURES=False, WHICH='run')

几个比较有用的参数
目前FULL_REFRESH，WHICH ，STORE_FAILURES ，SEND_ANONYMOUS_USAGE_STATS 是几个我们可能会使用到的
FULL_REFRESH 是判断是否是全量刷新的，WHICH 是判断当前执行的命令的（主要包含了run，build,test ...）STORE_FAILURES 是是否进行
测试异常存储的，SEND_ANONYMOUS_USAGE_STATS 是发送匿名上报信息的，这个是可以关闭的

内部处理

对于flags 处理实际包装了set_from_args以及get_flags，get_flags 会结合当前上下文信息进行数据准备

set_from_args 处理

def set_from_args(args: Namespace, project_flags):

    global GLOBAL_FLAGS

    from dbt.cli.main import cli

    from dbt.cli.flags import Flags, convert_config
 
    # we set attributes of args after initialize the flags, but project_flags

    # is being read in the Flags constructor, so we need to read it here and pass in

    # to make sure we use the correct project_flags

    profiles_dir = getattr(args, "PROFILES_DIR", None) or getattr(args, "profiles_dir", None)

    project_dir = getattr(args, "PROJECT_DIR", None) or getattr(args, "project_dir", None)

    if profiles_dir and project_dir:

        from dbt.config.project import read_project_flags
 
        project_flags = read_project_flags(project_dir, profiles_dir)
 
    # make a dummy context to get the flags, totally arbitrary

    ctx = cli.make_context("run", ["run"])

    flags = Flags(ctx, project_flags)

    for arg_name, args_param_value in vars(args).items():

        args_param_value = convert_config(arg_name, args_param_value)

        object.__setattr__(flags, arg_name.upper(), args_param_value)

        object.__setattr__(flags, arg_name.lower(), args_param_value)

    flags.set_common_global_flags()

    GLOBAL_FLAGS = flags  # type: ignore