Detect situation where Breeze is installed with both pipx and uv (apa…

…che#43694)

When breeze is installed with both - pipx and uv, we do not know
which version is available first on the path and self-upgrading
breeze might not upgrade the one that is first. Therefore we
detect that situation and fail self upgrade with appropriate
instructions what to do (recommending leaving uv as faster)

dev/breeze/src/airflow_breeze/utils/reinstall.py

@@ -37,14 +37,38 @@ def reinstall_breeze(breeze_sources: Path, re_run: bool = True):
     # Breeze from different sources than originally installed (i.e. when we reinstall airflow
     # From the current directory.
     get_console().print(f"\n[info]Reinstalling Breeze from {breeze_sources}\n")
-    result = subprocess.run(["uv", "tool", "list"], text=True, capture_output=True, check=False)
-    if result.returncode == 0:
-        if "apache-airflow-breeze" in result.stdout:
-            subprocess.check_call(
-                ["uv", "tool", "install", "--force", "--reinstall", "-e", breeze_sources.as_posix()]
-            )
-    else:
+    breeze_installed_with_uv = False
+    breeze_installed_with_pipx = False
+    result_uv = subprocess.run(["uv", "tool", "list"], text=True, capture_output=True, check=False)
+    if result_uv.returncode == 0:
+        if "apache-airflow-breeze" in result_uv.stdout:
+            breeze_installed_with_uv = True
+    result_pipx = subprocess.run(["pipx", "list"], text=True, capture_output=True, check=False)
+    if result_pipx.returncode == 0:
+        if "apache-airflow-breeze" in result_pipx.stdout:
+            breeze_installed_with_pipx = True
+    if breeze_installed_with_uv and breeze_installed_with_pipx:
+        get_console().print(
+            "[error]Breeze is installed both with `uv` and `pipx`. This is not supported.[/]\n"
+        )
+        get_console().print(
+            "[info]Please uninstall Breeze and install it only with one of the methods[/]\n"
+            "[info]The `uv` installation method is recommended as it is much faster[/]\n"
+        )
+        get_console().print(
+            "To uninstall Breeze installed with pipx run:\n     pipx uninstall apache-airflow-breeze\n"
+        )
+        get_console().print(
+            "To uninstall Breeze installed with uv run:\n     uv tool uninstall apache-airflow-breeze\n"
+        )
+        sys.exit(1)
+    elif breeze_installed_with_uv:
+        subprocess.check_call(
+            ["uv", "tool", "install", "--force", "--reinstall", "-e", breeze_sources.as_posix()]
+        )
+    elif breeze_installed_with_pipx:
         subprocess.check_call(["pipx", "install", "-e", breeze_sources.as_posix(), "--force"])
+
     if re_run:
         # Make sure we don't loop forever if the metadata hash hasn't been updated yet (else it is tricky to
         # run pre-commit checks via breeze!)