fix: add python prefix to the self update command on Windows (pdm-pro…

…ject#1972)

news/1972.feature.md

@@ -0,0 +1 @@
+Show the specific install commands for different installations when checking update. This was removed before.

src/pdm/cli/actions.py

@@ -734,13 +734,29 @@ def check_update(project: Project) -> None:
     """Check if there is a new version of PDM available"""
     from packaging.version import Version
 
+    from pdm.cli.utils import is_homebrew_installation, is_pipx_installation, is_scoop_installation
+
     this_version = project.core.version
     latest_version = get_latest_version(project)
     if latest_version is None or Version(this_version) >= Version(latest_version):
         return
-    install_command = "pdm self update" + (" --pre" if Version(latest_version).is_prerelease else "")
     disable_command = "pdm config check_update false"
 
+    is_prerelease = Version(latest_version).is_prerelease
+
+    if is_pipx_installation():
+        install_command = f"pipx upgrade {'--pip-args=--pre ' if is_prerelease else ''}pdm"
+    elif is_homebrew_installation():
+        install_command = "brew upgrade pdm"
+    elif is_scoop_installation():
+        install_command = "scoop update pdm"
+    else:
+        install_command = "pdm self update" + (" --pre" if is_prerelease else "")
+        if os.name == "nt":
+            # On Windows, the executable can't replace itself, we add the python prefix to the command
+            # A bit ugly but it works
+            install_command = f"{sys.executable} -m {install_command}"
+
     message = [
         f"\nPDM [primary]{this_version}[/]",
         f" is installed, while [primary]{latest_version}[/]",