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'file:' identifier in '--requirements' argument yields FileNotFoundError

See original GitHub issue

Description

Using a file: identifier when providing a --requirements|-r argument results in FileNotFoundError.

Expected behavior

The file should be found.

Previous versions worked fine. Alternatively, omitting the file: identifier works.

pip version

21.2.1

Python version

3.9.6

OS

MacOS 10.14

How to Reproduce

Create and activate Conda environment with:

conda create -n foo -c conda-forge python=3.9 pip=21.2.1
conda activate foo

Create requirements.txt:
```
echo "numpy" > requirements.txt
```
Run install command:
```
pip install -r file:requirements.txt
```
Error.

Output

(foo) bash-3.2$ pip install -r file:requirements.txt

ERROR: Exception:                                                                                                                                                                         
Traceback (most recent call last):                                                                                                                                                        
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_internal/cli/base_command.py", line 173, in _main                                                            
    status = self.run(options, args)                                                                                                                                                      
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_internal/cli/req_command.py", line 203, in wrapper                                                           
    return func(self, options, args)                                                                                                                                                      
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_internal/commands/install.py", line 286, in run                                                              
    reqs = self.get_requirements(args, options, finder, session)                                                                                                                          
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_internal/cli/req_command.py", line 384, in get_requirements                                                  
    for parsed_req in parse_requirements(                                                                                                                                                 
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_internal/req/req_file.py", line 135, in parse_requirements                                                   
    for parsed_line in parser.parse(filename, constraint):                                                                                                                                
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_internal/req/req_file.py", line 319, in parse                                                                
    yield from self._parse_and_recurse(filename, constraint)                                                                                                                              
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_internal/req/req_file.py", line 324, in _parse_and_recurse                                                   
    for line in self._parse_file(filename, constraint):                                                                                                                                   
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_internal/req/req_file.py", line 353, in _parse_file                                                          
    _, content = get_file_content(filename, self._session)                                                                                                                                
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_internal/req/req_file.py", line 518, in get_file_content                                                     
    resp = session.get(url)                                                                                                                                                               
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_vendor/requests/sessions.py", line 555, in get                                                               
    return self.request('GET', url, **kwargs)                                                                                                                                             
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_internal/network/session.py", line 454, in request                                                           
    return super().request(method, url, *args, **kwargs)                                                                                                                                  
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_vendor/requests/sessions.py", line 542, in request                                                           
    resp = self.send(prep, **send_kwargs)                                                                                                                                                 
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_vendor/requests/sessions.py", line 697, in send                                                              
    r.content                                                                                                                                                                             
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_vendor/requests/models.py", line 836, in content                                                             
    self._content = b''.join(self.iter_content(CONTENT_CHUNK_SIZE)) or b''                                                                                                                
  File "/Users/mfansler/miniconda3/envs/foo/lib/python3.9/site-packages/pip/_vendor/requests/models.py", line 769, in generate                                                            
    chunk = self.raw.read(chunk_size)                                                                                                                                                     
AttributeError: 'FileNotFoundError' object has no attribute 'read'

Code of Conduct

I agree to follow the PSF Code of Conduct.

Issue Analytics

State:
Created 2 years ago
Comments:5 (4 by maintainers)

Top GitHub Comments

2reactions

uranusjrcommented, Jul 30, 2021

file:requirements.txt is not a valid URL. The standard (RFC 8089) mandates the URL must starts with file:// or file: + absolute path. This is neither, so pip treats it as a local relative path and correctly fails.

Feel free to submit a PR for better error messages, but this is not a bug.

1reaction

mfanslercommented, Oct 8, 2021

@DiddiLeija @pradyunsg thanks for addressing this! ❤️

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