Avoid warnings about PATH with pipx installations (#3920)

src/ansiblelint/__main__.py

@@ -452,6 +452,7 @@ def path_inject(own_location: str = "") -> None:
         inject_paths.append(str(py_path))
 
     # last option, if nothing else is found, just look next to ourselves...
+    own_location = os.path.realpath(own_location)
     if (
         own_location
         and (Path(own_location).parent / "ansible").exists()
@@ -460,7 +461,7 @@ def path_inject(own_location: str = "") -> None:
         inject_paths.append(str(Path(own_location).parent))
 
     if not os.environ.get("PYENV_VIRTUAL_ENV", None):
-        if inject_paths:
+        if inject_paths and not all("pipx" in p for p in inject_paths):
             print(  # noqa: T201
                 f"WARNING: PATH altered to include {', '.join(inject_paths)} :: This is usually a sign of broken local setup, which can cause unexpected behaviors.",
                 file=sys.stderr,

tox.ini

@@ -80,6 +80,7 @@ allowlist_externals =
   sh
   tox
   ./tools/test-hook.sh
+  {toxworkdir}/.pipx/bin/ansible-lint
 # https://tox.wiki/en/latest/upgrading.html#editable-mode
 package = editable
 
@@ -191,10 +192,15 @@ description =
 deps =
   build >= 0.9.0
   twine >= 4.0.1
+  pipx
 skip_install = true
 # Ref: https://twitter.com/di_codes/status/1044358639081975813
 commands_pre =
 commands =
+  # Testing pipx usage
+  bash -c "PIPX_BIN_DIR={toxworkdir}/.pipx/bin PIPX_HOME={toxworkdir}/.pipx pipx install --force -e ."
+  # Testing that calling the pipx installation does return 0 return code and no output in stderr
+  bash -c "if stderr=$({toxworkdir}/.pipx/bin/ansible-lint --version >/dev/null) && test -z \"$stderr\"; then echo "ok"; fi"
   # build wheel and sdist using PEP-517
   {envpython} -c 'import os.path, shutil, sys; \
   dist_dir = os.path.join("{toxinidir}", "dist"); \