Libcst

Added

- Support string type annotations in RemoveUnusedImports [353](https://github.com/Instagram/LibCST/pull/353)
- Add scope to ImportAlias [350](https://github.com/Instagram/LibCST/pull/350)
- Add scope to ClassDef [349](https://github.com/Instagram/LibCST/pull/349)

Fixed

- Fixed all pyre related errors [360](https://github.com/Instagram/LibCST/pull/360)
- Fixed enclosing attribute for attributes in call arguments [362](https://github.com/Instagram/LibCST/pull/362)

Added

- Handle type subscripts when applying annotations. [335](https://github.com/Instagram/LibCST/pull/335)
- Added FullRepoManager `cache` property [330](https://github.com/Instagram/LibCST/pull/330)
- Added optional args for tox commands [327](https://github.com/Instagram/LibCST/pull/327)

Updated

- Only remove trailing comma if the last alias is removed [334](https://github.com/Instagram/LibCST/pull/334)

Fixed

- Fixed inserting imports after module docstring [343](https://github.com/Instagram/LibCST/pull/343)
- Fixed ParenthesizedWhitespace before params in FuncDef [342](https://github.com/Instagram/LibCST/pull/342)
- Fixed validation for ImportAlias and Try statements [340](https://github.com/Instagram/LibCST/pull/340)
- Fixed NotEqual position issue [325](https://github.com/Instagram/LibCST/pull/325)
- Fixed minor typo in scope_provider.py [324](https://github.com/Instagram/LibCST/pull/324)

Added

- Added `RenameCommand` to rename all instances of a local or imported object to a specified new name. [308](https://github.com/Instagram/LibCST/pull/308)

Updated

- Upgraded Codecov dev dependency to 2.1.4. [311](https://github.com/Instagram/LibCST/pull/311)
- Enabled Pyre `strict` mode by default. [313](https://github.com/Instagram/LibCST/pull/313)

Fixed

- Fixed `ImportError` under Python 3.9. [306](https://github.com/Instagram/LibCST/pull/306)
- Fixed `stdout` being plugged into successfully codemod-ed files. [309](https://github.com/Instagram/LibCST/pull/309)
- Fixed `QualifiedName` retrieval for names with repeated substrings. [312](https://github.com/Instagram/LibCST/pull/312)
- Fixed default values of keyword-only and positional-only arguments in `ApplyTypeAnnotationsVisitor`. [314](https://github.com/Instagram/LibCST/pull/314)
- Fixed `ExpressionContextProvider` by giving subscript values a `LOAD`context. [319](https://github.com/Instagram/LibCST/pull/319)

Added

- Added `ConvertNamedTupleToDataclassCommand` to convert `NamedTuple` class declarations to Python 3.7 `dataclasses` using the `dataclass(frozen=True)` decorator. [299](https://github.com/Instagram/LibCST/pull/299)

Fixed

- Fixed typo in file name `libcst/codemod/commands/convert_percent_format_to_fstring.py`. [301](https://github.com/Instagram/LibCST/pull/301)
- Fixed `StopIteration` exception during scope analysis matching on import names. [302](https://github.com/Instagram/LibCST/pull/302)

Updated

- Expose more granular `Assignments` and `Accesses` for dotted imports in `ScopeProvider`. [284](https://github.com/Instagram/LibCST/pull/284)
- `get_qualified_names_for` returns the most appropriate qualified name. [290](https://github.com/Instagram/LibCST/pull/290)
- Surface `SyntaxError` raised by formatter in codemod run. [288](https://github.com/Instagram/LibCST/pull/288) [#289](https://github.com/Instagram/LibCST/pull/289)
- Rename `ApplyTypeAnnotationsVisitor.add_stub_to_context` as `ApplyTypeAnnotationsVisitor.store_stub_in_context` and add `overwrite_existing_annotations` to allow overwrite existing type annotations. [289](https://github.com/Instagram/LibCST/pull/291)

Fixed

- Close opened file handles on finishing codemod to avoid `Too many open files` on OSX. [283](https://github.com/Instagram/LibCST/pull/283)

Deprecated

- `ApplyTypeAnnotationsVisitor.add_stub_to_context` is renamed as `ApplyTypeAnnotationsVisitor.store_stub_in_context`.

Added

- Supported CST parsing for Python 3.0, 3.1 and 3.3. [261](https://github.com/Instagram/LibCST/pull/261)
- Added `RemoveUnusedImportsCommand` for removing unused import codemod. [266](https://github.com/Instagram/LibCST/pull/266)
- Added `ApplyTypeAnnotationsVisitor.add_stub_to_context` for apply type annotations from stub modules. [265](https://github.com/Instagram/LibCST/pull/265)

Updated

- Improved exception message of `get_metadata` when MetadataWrapper is not used. [257](https://github.com/Instagram/LibCST/pull/257)
- New steps for Pyre type check in README.rst which analyzes installed Python sources for better type checking. [262](https://github.com/Instagram/LibCST/pull/262)

Fixed

- Parsed `except(Exception):` correctly while there is no space after except syntax. [256](https://github.com/Instagram/LibCST/pull/256)
- Fixed `RemoveImportsVisitor` to not remove imports when references still exist. [264](https://github.com/Instagram/LibCST/pull/264)
- Fixed missing type annotations. [271](https://github.com/Instagram/LibCST/pull/271)
- `AddImportsVisitor` generates deterministic order for added imports. [274](https://github.com/Instagram/LibCST/pull/274)