Preemptively determine the path of the user configuration file during
the construction of the `ConfigFileFinder` object. The user
configuration path will always be the same, regardless of when it gets
obtained by a run of `flake8`.
This isolates the logic of determining the user configuration path into
a static helper method to be called to set the `.user_config_file`
attribute. The helper method leverages `utils.is_windows()`, instead of
reimplementing the check, and decomposes clearly the directory name and
the base name to construct the path with a single `return` path.
Additionally, this avoids reconstructing the path on demand of obtaining
the user configuration file path.
Remove the checks to see if a configuration file has already been seen
and parsed. These checks aren't necessary because the entire run of
`flake8` calls these methods *only* once per configuration provided.
Now that `ConfigFileFinder.config_file` attribute is used everywhere and
is constructed from the `--config` CLI option, the now unused
`cli_config` parameters can be safely removed.
Now that the `ConfigFileFinder` has the `.config_file` attribute, switch
the relevant code paths to utilize this public attribute.
Tests have been updated to either construct `ConfigFileFinder` or mock
the object appropriately.
The `--config` flag is passed into `MergedConfigParser.parse()` and the
module-level function `config.get_local_plugins()`. Since both of these
places utilize the `ConfigFileFinder` object and the configuration file
override pertains to how configuration behaves, this incremental change
directly associates the `ConfigFileFinder` and the configuration file
override.
These attributes are only needed within the
`.generate_possible_local_files()` method. Therefore, just obtain the
current working directory at the beginning of the method and reduce the
lifetime state of the `ConfigFileFinder` object.
`os.getcwd()` returns an absolute path; thus, the patched paths should
be absolute as well.
This is an incremental change towards removing the `ConfigFileFinder`
attributes `.parent` and `.tail` to be localized to
`.generate_possible_local_files()`. Without this, the tests fail when
moving the patching because `os.path.abspath()` calls `os.getcwd()`,
expecting `os.getcwd()` to be an absolute path.
Now that `ConfigFileFinder.ignore_config_files` attribute is used
everywhere and is constructed from the `--isolated` CLI option, the now
unused `isolated` parameters can be safely removed.
Now that the `ConfigFileFinder` has the `.ignore_config_files`
attribute, switch the relevant code paths to utilize this public
attribute.
Tests have been updated to either construct `ConfigFileFinder` or mock
the object appropriately.
The `--isolated` flag is passed into `MergedConfigParser.parse()` and
the module-level function `config.get_local_plugins()`. Since both of
these places utilize the `ConfigFileFinder` object and isolation
pertains to how the `ConfigFileFinder` should behave with respect to
isolation, this incremental change more directly associates the
`ConfigFileFinder` and configuration file isolate.
This simplifies `._read_config()` by removing a conditional branch in
the situation where it is called with one file to process. Now the
contract accepts any number of arguments of the same type.
Where callers invoke `._read_config()` with a `Sequence`, the call site
has been changed to unpack arguments (i.e., `*`).
The tests in `test_merged_config_parser.py` needed to return a string
for the user configuration path instead of an empty list since
`ConfigFileFinder.user_config_file()` returns a string.
This fixes a regression introduced in !346 to ensure that `--config` and
`--isolated` are recognized in `aggregate_options()`.
The regression manifested because `aggregate_options()` was relying on
re-parsing `argv` to obtain the option values. However, !346 changed
the preliminary parsing logic to only parse and "eat" what is necessary
and forward along the options needed before all the configuration was
loaded. This code path was overlooked because the tests in
`test_aggregator()` were passing but the call from the `Application`
object would never have these options in the remaining `argv` list to be
passed long.
Simplify the initialization code path by invoking
`config.ConfigFileFinder` directly instead of the extra hop by calling
the static class-level `Application.make_config_finder()` method.
