Add --force-reinstall to pip args when --force was passed

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## dev
 
+- Add `--force-reinstall` to pip arguments when `--force` was passed
 - Use the py launcher, if available, to select Python version with the `--python` option
 - Support including requirements in scripts run using `pipx run` (#916)
 - Pass `pip_args` to `shared_libs.upgrade()`
@@ -16,7 +17,6 @@
 - [docs] Add an example for installation from source with extras
 - Match pip's behaviour when package name ends with archive extension (treat it as a path)
 - Ship a [zipapp](https://docs.python.org/3/library/zipapp.html) of pipx
-
 - Change the program name to `path/to/python -m pipx` when running as `python -m pipx`
 - Improve the detection logic for MSYS2 to avoid entering infinite loop (#908) (#938)
 - Remove extra trailing quote from exception message

src/pipx/commands/install.py

@@ -43,6 +43,7 @@ def install(
     if exists:
         if force:
             print(f"Installing to existing venv {venv.name!r}")
+            pip_args += ["--force-reinstall"]
         else:
             print(
                 pipx_wrap(

tests/test_install.py

@@ -261,3 +261,15 @@ def test_install_local_archive(pipx_temp_env, monkeypatch, capsys):
     assert not run_pipx_cli(["install", "repeatme-0.1-py3-none-any.whl"])
     captured = capsys.readouterr()
     assert f"- {app_name('repeatme')}\n" in captured.out
+
+
+def test_force_install_changes(pipx_temp_env, capsys):
+    assert not run_pipx_cli(
+        ["install", "https://github.com/wntrblm/nox/archive/2022.1.7.zip"]
+    )
+    captured = capsys.readouterr()
+    assert "2022.1.7" in captured.out
+
+    assert not run_pipx_cli(["install", "nox", "--force"])
+    captured = capsys.readouterr()
+    assert "2022.1.7" not in captured.out