Feature: Replace halo, click, and termcolor with rich

.pre-commit-config.yaml

@@ -5,7 +5,6 @@ repos:
     rev: 22.3.0
     hooks:
       - id: black
-        exclude: ^pdm/_vendor
 
   - repo: https://github.com/PyCQA/flake8
     rev: 4.0.1

news/1091.dep.md

@@ -0,0 +1 @@
+Drop the vendored libraries `click`, `halo`, `colorama` and `log_symbols`. PDM has no vendors now.

news/1091.feature.md

@@ -0,0 +1 @@
+Switch the UI backend to `rich`.

news/1091.misc.md

@@ -0,0 +1 @@
+Extract the compatibility import statements into `compat` module.

pdm/_types.py

@@ -1,22 +1,18 @@
-import sys
-from typing import Any, Dict, List, NamedTuple, Tuple, Union
+from __future__ import annotations
 
-if sys.version_info >= (3, 8):
-    from importlib.metadata import Distribution
-    from typing import Literal, Protocol, TypedDict
-else:
-    from importlib_metadata import Distribution
-    from typing_extensions import Literal, Protocol, TypedDict
+from typing import Any, Dict, List, NamedTuple, Tuple, TypeVar, Union
+
+from pdm.compat import Literal, Protocol, TypedDict
 
 
 class Source(TypedDict, total=False):
     url: str
     verify_ssl: bool
     name: str
-    type: Union[Literal["index"], Literal["find_links"]]
+    type: Literal["index"] | Literal["find_links"]
 
 
-RequirementDict = Union[str, Dict[str, Union[bool, str]]]
+RequirementDict = Union[str, Dict[str, Union[str, bool]]]
 CandidateInfo = Tuple[List[str], str, str]
 
 
@@ -31,15 +27,18 @@ def __lt__(self, __other: Any) -> bool:
         ...
 
 
-SearchResult = List[Package]
+SpinnerT = TypeVar("SpinnerT", bound="Spinner")
+
 
-__all__ = (
-    "Literal",
-    "Source",
-    "RequirementDict",
-    "CandidateInfo",
-    "Distribution",
-    "Package",
-    "SearchResult",
-    "Protocol",
-)
+class Spinner(Protocol):
+    def update(self, text: str) -> None:
+        ...
+
+    def __enter__(self: SpinnerT) -> SpinnerT:
+        ...
+
+    def __exit__(self, *args: Any) -> None:
+        ...
+
+
+SearchResult = List[Package]