poetry add mojimoji fails

• I am on the latest Poetry version.

• I have searched the issues of this repo and believe that this is not a duplicate.

• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name:

Mac OS X 10.14.6

• Poetry version:

0.12.17

• Link of a Gist with the contents of your pyproject.toml file:

https://gist.github.com/tamuhey/a2f03a72a4cb9b6e5b8b6cfd3c72a0fe

Issue

command:

$ poetry add mojimoji -vvv

fails. The error shown:

Using virtualenv: /Users/my_name/work/foo/.venv
PyPI: 9 packages found for mojimoji *
Using version ^0.0.9 for mojimoji

Updating dependencies
Resolving dependencies...
   1: fact: foo is 0.1.0
   1: derived: foo
   1: fact: foo depends on mojimoji (^0.0.9)
   1: selecting foo (0.1.0)
   1: derived: mojimoji (^0.0.9)
PyPI: 1 packages found for mojimoji >=0.0.9,<0.0.10
   1: selecting mojimoji (0.0.9)
   1: Version solving took 0.008 seconds.
   1: Tried 1 solutions.


Package operations: 1 install, 0 updates, 0 removals

  - Installing mojimoji (0.0.9)
                                                                                                                                                                  
[EnvCommandError]                                                                                                                                  
Command ['/Users/my_name/work/foo/.venv/bin/python', '-m', 'pip', 'install', '--no-deps', 'mojimoji==0.0.9'] errored with the following return code 1, and output:           
Collecting mojimoji==0.0.9                                                                                                                                      
  Could not find a version that satisfies the requirement mojimoji==0.0.9 (from versions: 0.0.1, 0.0.2, 0.0.3, 0.0.4, 0.0.5, 0.0.6, 0.0.7, 0.0.8, 0.0.9.post0)  
No matching distribution found for mojimoji==0.0.9                                                                                                              
You are using pip version 19.0.3, however version 19.2.3 is available.                                                                                          
You should consider upgrading via the 'pip install --upgrade pip' command.                                                                                      
                                                                                                                                                                  
Exception trace:
 /Users/my_name/.poetry/lib/poetry/_vendor/py3.7/cleo/application.py in run() at line 94
   status_code = self.do_run(input_, output_)
 /Users/my_name/.poetry/lib/poetry/console/application.py in do_run() at line 88
   return super(Application, self).do_run(i, o)
 /Users/my_name/.poetry/lib/poetry/_vendor/py3.7/cleo/application.py in do_run() at line 197
   status_code = command.run(input_, output_)
 /Users/my_name/.poetry/lib/poetry/console/commands/command.py in run() at line 77
   return super(BaseCommand, self).run(i, o)
 /Users/my_name/.poetry/lib/poetry/_vendor/py3.7/cleo/commands/base_command.py in run() at line 146
   status_code = self.execute(input_, output_)
 /Users/my_name/.poetry/lib/poetry/_vendor/py3.7/cleo/commands/command.py in execute() at line 107
   return self.handle()
 /Users/my_name/.poetry/lib/poetry/console/commands/add.py in handle() at line 139
   status = installer.run()
 /Users/my_name/.poetry/lib/poetry/installation/installer.py in run() at line 73
   self._do_install(local_repo)
 /Users/my_name/.poetry/lib/poetry/installation/installer.py in _do_install() at line 290
   self._execute(op)
 /Users/my_name/.poetry/lib/poetry/installation/installer.py in _execute() at line 306
   getattr(self, "_execute_{}".format(method))(operation)
 /Users/my_name/.poetry/lib/poetry/installation/installer.py in _execute_install() at line 331
   self._installer.install(operation.package)
 /Users/my_name/.poetry/lib/poetry/installation/pip_installer.py in install() at line 91
   self.run(*args)
 /Users/my_name/.poetry/lib/poetry/installation/pip_installer.py in run() at line 112
   return self._env.run("python", "-m", "pip", *args, **kwargs)
 /Users/my_name/.poetry/lib/poetry/utils/env.py in run() at line 539
   return super(VirtualEnv, self).run(bin, *args, **kwargs)
 /Users/my_name/.poetry/lib/poetry/utils/env.py in run() at line 388
   raise EnvCommandError(e, input=input_)

add [-D|--dev] [--git GIT] [--path PATH] [-E|--extras EXTRAS] [--optional] [--python PYTHON] [--platform PLATFORM] [--allow-prereleases] [--dry-run] [--] <name> (<name>)...

[Secrus]

There is no problem installing mojimoji in the current master version of Poetry.

[Jamim]

So do you think this is a glitch in Poetry’s constraint checking mechanism?

It seems so.