Merge branch 'main' into allow_spaces_in_home_via_envvar

changelog.d/1451.feature.md

@@ -0,0 +1 @@
+Add a `--prepend` option to the `pipx ensurepath` command to allow prepending `pipx`'s location to `PATH` rather than appending to it. This is useful when you want to prioritize `pipx`'s executables over other executables in your `PATH`.

docs/installation.md

@@ -19,9 +19,23 @@ pipx works on macOS, linux, and Windows.
 ```
 brew install pipx
 pipx ensurepath
-sudo pipx ensurepath --global # optional to allow pipx actions in global scope. See "Global installation" section below.
 ```
 
+#### Additional (optional) commands
+
+To allow pipx actions in global scope.
+```
+sudo pipx ensurepath --global
+```
+
+To prepend the pipx bin directory to PATH instead of appending it.
+
+```
+sudo pipx ensurepath --prepend
+```
+
+For more details, refer to [Customising your installation](#customising-your-installation).
+
 ### On Linux:
 
 - Ubuntu 23.04 or above
@@ -30,25 +44,37 @@ sudo pipx ensurepath --global # optional to allow pipx actions in global scope.
 sudo apt update
 sudo apt install pipx
 pipx ensurepath
-sudo pipx ensurepath --global # optional to allow pipx actions in global scope. See "Global installation" section below.
 ```
 
 - Fedora:
 
 ```
 sudo dnf install pipx
 pipx ensurepath
-sudo pipx ensurepath --global # optional to allow pipx actions in global scope. See "Global installation" section below.
 ```
 
 - Using `pip` on other distributions:
 
 ```
 python3 -m pip install --user pipx
 python3 -m pipx ensurepath
-sudo pipx ensurepath --global # optional to allow pipx actions in global scope. See "Global installation" section below.
 ```
 
+#### Additional (optional) commands
+
+To allow pipx actions in global scope.
+
+```
+sudo pipx ensurepath --global
+```
+
+To prepend the pipx bin directory to PATH instead of appending it.
+
+```
+sudo pipx ensurepath --prepend
+```
+
+For more details, refer to [Customising your installation](#customising-your-installation).
 
 ### On Windows:
 
@@ -160,7 +186,9 @@ sudo PIPX_HOME=/opt/pipx PIPX_BIN_DIR=/usr/local/bin PIPX_MAN_DIR=/usr/local/sha
 > This was reverted in 1.5.0 for Windows and MacOS. We heavily recommend not using these locations on Windows and MacOS anymore, due to
 > multiple incompatibilities discovered with these locations, documented [here](https://github.com/pypa/pipx/discussions/1247#discussion-6188916).
 
-### Global installation
+### Customising your installation
+
+#### `--global` argument
 
 Pipx also comes with a `--global` argument which helps to execute actions in global scope which exposes the app to
 all system users. By default the global binary location is set to `/usr/local/bin` and can be overridden with the
@@ -171,6 +199,12 @@ if you intend to use this feature.
 
 Note that the `--global` argument is not supported on Windows.
 
+#### `--prepend` argument
+
+The `--prepend` argument can be passed to the `pipx ensurepath` command to prepend the `pipx` bin directory to the user's PATH
+environment variable instead of appending to it. This can be useful if you want to prioritise `pipx`-installed binaries over
+system-installed binaries of the same name.
+
 ## Upgrade pipx
 
 On macOS:

src/pipx/commands/ensure_path.py

@@ -51,8 +51,9 @@ def get_pipx_user_bin_path() -> Optional[Path]:
     return pipx_bin_path
 
 
-def ensure_path(location: Path, *, force: bool) -> Tuple[bool, bool]:
+def ensure_path(location: Path, *, force: bool, prepend: bool = False) -> Tuple[bool, bool]:
     """Ensure location is in user's PATH or add it to PATH.
+    If prepend is True, location will be prepended to PATH, else appended.
     Returns True if location was added to PATH
     """
     location_str = str(location)
@@ -61,7 +62,10 @@ def ensure_path(location: Path, *, force: bool) -> Tuple[bool, bool]:
     in_current_path = userpath.in_current_path(location_str)
 
     if force or (not in_current_path and not need_shell_restart):
-        path_added = userpath.append(location_str, "pipx")
+        if prepend:
+            path_added = userpath.prepend(location_str, "pipx")
+        else:
+            path_added = userpath.append(location_str, "pipx")
         if not path_added:
             print(
                 pipx_wrap(
@@ -96,7 +100,7 @@ def ensure_path(location: Path, *, force: bool) -> Tuple[bool, bool]:
     return (path_added, need_shell_restart)
 
 
-def ensure_pipx_paths(force: bool) -> ExitCode:
+def ensure_pipx_paths(force: bool, prepend: bool = False) -> ExitCode:
     """Returns pipx exit code."""
     bin_paths = {paths.ctx.bin_dir}
 
@@ -106,8 +110,10 @@ def ensure_pipx_paths(force: bool) -> ExitCode:
 
     path_added = False
     need_shell_restart = False
+    path_action_str = "prepended to" if prepend else "appended to"
+
     for bin_path in bin_paths: