Make uv an optional dependency again

Author: sbidoul

news/162.feature

@@ -0,0 +1 @@
+Make `uv` and optional dependency again.

pyproject.toml

@@ -31,7 +31,6 @@ dependencies=[
     "typer >=0.12.1",
     # installers
     "pip >=22.2",
-    "uv >=0.2.37",
     # compat
     "importlib_resources>=1.3 ; python_version<'3.9'",
     "tomli ; python_version<'3.11'",
@@ -41,6 +40,7 @@ dynamic = ["version"]
 [project.optional-dependencies]
 "test" = ["pytest", "pytest-cov", "pytest-xdist", "virtualenv", "setuptools", "wheel"]
 "mypy" = ["mypy", "types-toml", "types-setuptools"]
+"uv" = ["uv >=0.4.10"]
 
 [project.scripts]
 pip-df = "pip_deepfreeze.__main__:main"

src/pip_deepfreeze/pip.py

@@ -1,6 +1,5 @@
 import json
 import shlex
-import sys
 import textwrap
 from abc import ABC, abstractmethod
 from enum import Enum
@@ -33,6 +32,7 @@
     get_pip_command,
     get_pip_version,
     get_python_version_info,
+    get_uv_cmd,
 )
 from .utils import (
     check_call,
@@ -115,7 +115,7 @@ def has_metadata_cache(self) -> bool:
 
 class UvpipInstaller(Installer):
     def install_cmd(self, python: str) -> List[str]:
-        return [sys.executable, "-m", "uv", "pip", "install", "--python", python]
+        return [*get_uv_cmd(), "pip", "install", "--python", python]
 
     def editable_install_cmd(
         self,
@@ -130,10 +130,10 @@ def editable_install_cmd(
         return cmd
 
     def uninstall_cmd(self, python: str) -> List[str]:
-        return [sys.executable, "-m", "uv", "pip", "uninstall", "--python", python]
+        return [*get_uv_cmd(), "pip", "uninstall", "--python", python]
 
     def freeze_cmd(self, python: str) -> List[str]:
-        return [sys.executable, "-m", "uv", "pip", "freeze", "--python", python]
+        return [*get_uv_cmd(), "pip", "freeze", "--python", python]
 
     def has_metadata_cache(self) -> bool:
         return True

src/pip_deepfreeze/sanity.py

@@ -4,6 +4,7 @@
 import sys
 from functools import lru_cache
 from importlib.metadata import version
+from shutil import which
 from typing import Optional, Tuple, TypedDict, cast
 
 import typer
@@ -47,6 +48,20 @@ def get_pip_version(python: str) -> Version:
     return Version(version("pip"))
 
 
+@lru_cache
+def get_uv_cmd() -> tuple[str, ...]:
+    try:
+        import uv  # type: ignore[import-not-found]
+    except ImportError as e:
+        uv = which("uv")
+        if not uv:
+            log_error("uv is not installed.")
+            raise typer.Exit(1) from e
+        return (uv,)
+    else:
+        return (sys.executable, "-m", "uv")
+
+
 @lru_cache
 def get_pip_command(python: str) -> Tuple[str, ...]:
     pip_options = ("--no-input",)