[bug] Typer CLI command doesn't add curdir() to sys.path properly

[gcr]

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Example Code

import typer
import sys
print(sys.path)

import some_other_module_in_curdir

def foo(bar: str):
    print(bar)

if __name__=="__main__":
    typer.run(foo)

Description

sys.path is incorrect when running the typer CLI command!

to see this, make two files, some_other_module_in_curdir.py and main.py containing

import typer
import sys
print(sys.path)

import some_other_module_in_curdir

def foo(bar: str):
    print(bar)

if __name__=="__main__":
    typer.run(foo)

Running python main.py "hello world" works:

['/private/tmp', '/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python313.zip', '/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13', '/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/lib-dynload', '/private/tmp/typer-venv/lib/python3.13/site-packages']
hello world

But running typer main.py "hello world" fails:

['/private/tmp/typer-venv/bin', '/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python313.zip', '/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13', '/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/lib-dynload', '/private/tmp/typer-venv/lib/python3.13/site-packages']

[.... omitting typer-specific parts of traceback...]

╭─────────────────────────────────────────────────────────────────── locals ───────────────────────────────────────────────────────────────────╮ │
│ │ args = (                                                                                                                                     │ │
│ │        │   <code object <module> at 0x105349d10, file "/private/tmp/main.py", line 1>,                                                       │ │
│ │        │   {                                                                                                                                 │ │
│ │        │   │   '__name__': 'main.py',                                                                                                        │ │
│ │        │   │   '__doc__': None,                                                                                                              │ │
│ │        │   │   '__package__': 'main',                                                                                                        │ │
│ │        │   │   '__loader__': <_frozen_importlib_external.SourceFileLoader object at 0x104187fb0>,                                            │ │
│ │        │   │   '__spec__': ModuleSpec(name='main.py', loader=<_frozen_importlib_external.SourceFileLoader object at 0x104187fb0>,            │ │
│ │        origin='/private/tmp/main.py'),                                                                                                       │ │
│ │        │   │   '__file__': '/private/tmp/main.py',                                                                                           │ │
│ │        │   │   '__cached__': '/private/tmp/__pycache__/main.cpython-313.pyc',                                                                │ │
│ │        │   │   '__builtins__': {                                                                                                             │ │
│ │        │   │   │   '__name__': 'builtins',                                                                                                   │ │
│ │        │   │   │   '__doc__': 'Built-in functions, types, exceptions, and other objects.\n\nThis module provides '+346,                      │ │
│ │        │   │   │   '__package__': '',                                                                                                        │ │
│ │        │   │   │   '__loader__': <class '_frozen_importlib.BuiltinImporter'>,                                                                │ │
│ │        │   │   │   '__spec__': ModuleSpec(name='builtins', loader=<class '_frozen_importlib.BuiltinImporter'>, origin='built-in'),           │ │
│ │        │   │   │   '__build_class__': <built-in function __build_class__>,                                                                   │ │
│ │        │   │   │   '__import__': <built-in function __import__>,                                                                             │ │
│ │        │   │   │   'abs': <built-in function abs>,                                                                                           │ │
│ │        │   │   │   'all': <built-in function all>,                                                                                           │ │
│ │        │   │   │   'any': <built-in function any>,                                                                                           │ │
│ │        │   │   │   ... +149                                                                                                                  │ │
│ │        │   │   },                                                                                                                            │ │
│ │        │   │   'typer': <module 'typer' from '/private/tmp/typer-venv/lib/python3.13/site-packages/typer/__init__.py'>,                      │ │
│ │        │   │   'sys': <module 'sys' (built-in)>                                                                                              │ │
│ │        │   }                                                                                                                                 │ │
│ │        )                                                                                                                                     │ │
│ │    f = <built-in function exec>                                                                                                              │ │
│ │ kwds = {}                                                                                                                                    │ │
│ ╰──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯ │
│                                                                                                                                                  │
│ /private/tmp/main.py:3 in <module>                                                                                                               │
│                                                                                                                                                  │
│    1 import typer                                                                                                                                │
│    2 import sys; print(sys.path)                                                                                                                 │
│ ❱  3 import some_other_module_in_curdir                                                                                                                                  │
│    4                                                                                                                                             │
│    5 def main(foo: str):                                                                                                                         │
│    6 │   print(foo)                                                                                                                              │
│                                                                                                                                                  │
│ ╭──────────────────────────────────────────────── locals ────────────────────────────────────────────────╮                                       │
│ │   sys = <module 'sys' (built-in)>                                                                      │                                       │
│ │ typer = <module 'typer' from '/private/tmp/typer-venv/lib/python3.13/site-packages/typer/__init__.py'> │                                       │
│ ╰────────────────────────────────────────────────────────────────────────────────────────────────────────╯                                       │
╰──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
ModuleNotFoundError: No module named 'some_other_module_in_curdir'

Operating System

macOS

Operating System Details

MacOS, running in

Typer Version

0.15.1

Python Version

Python 3.13.1

Additional Context

Also happens on Python 3.12

[YuriiMotov]

Works well with current version (Typer 0.17.4, Python 3.12)