poetry install failed for {path=.../git=...} dependency if the package does not have setup.py

• 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).

• macOS Catalina 10.15.3
• 1.0.5 and 1.1.0a1
• https://github.com/lambdalisue/poetry-test

Issue

I’m not sure if it’s a bug on poetry but I could not complete poetry install by the following exceptions. The minimum repository to reproduce this behavior has linked above.

With Poetry 1.0.5

Installing dependencies from lock file


Package operations: 1 install, 0 updates, 0 removals

  - Installing package-a (0.1.0 package-a)

[EnvCommandError]
Command ['/Users/alisue/Library/Caches/pypoetry/virtualenvs/poetry-test-MDzUKMz
t-py3.7/bin/pip', 'install', '--no-deps', '-U', '-e', '/Users/alisue/.ghq/githu
b.com/lambdalisue/poetry-test/package-a'] errored with the following return cod
e 1, and output:
Obtaining file:///Users/alisue/.ghq/github.com/lambdalisue/poetry-test/package-
a
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'done'
    Preparing wheel metadata: started
    Preparing wheel metadata: finished with status 'done'
Installing collected packages: package-a
  Running setup.py develop for package-a
    ERROR: Command errored out with exit status 1:
     command: /Users/alisue/Library/Caches/pypoetry/virtualenvs/poetry-test-MDz
UKMzt-py3.7/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"
'/Users/alisue/.ghq/github.com/lambdalisue/poetry-test/package-a/setup.py'"'"';
 __file__='"'"'/Users/alisue/.ghq/github.com/lambdalisue/poetry-test/package-a/
setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read()
.replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '
"'"'exec'"'"'))' develop --no-deps
         cwd: /Users/alisue/.ghq/github.com/lambdalisue/poetry-test/package-a/
    Complete output (3 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
    ModuleNotFoundError: No module named 'setuptools'
    ----------------------------------------
ERROR: Command errored out with exit status 1: /Users/alisue/Library/Caches/pyp
oetry/virtualenvs/poetry-test-MDzUKMzt-py3.7/bin/python -c 'import sys, setupto
ols, tokenize; sys.argv[0] = '"'"'/Users/alisue/.ghq/github.com/lambdalisue/poe
try-test/package-a/setup.py'"'"'; __file__='"'"'/Users/alisue/.ghq/github.com/l
ambdalisue/poetry-test/package-a/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'
"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close
();exec(compile(code, __file__, '"'"'exec'"'"'))' develop --no-deps Check the l
ogs for full command output.
WARNING: You are using pip version 19.2.3, however version 20.0.2 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

I have no idea but executing /Users/alisue/.../bin/python -c 'import setuptools' after above exception does NOT fail. Thus it seems setuptools is not available only during pip installation???

Poetry 1.1.0a1

Installing dependencies from lock file


Package operations: 1 install, 0 updates, 0 removals

  - Installing package-a (0.1.0 package-a)

  TypeError

  __init__() takes from 2 to 3 positional arguments but 4 were given

  at ~/.poetry/lib/poetry/installation/pip_installer.py:214 in install_director
y
      210|             # file since pip, as of this comment, does not support
      211|             # build-system for editable packages
      212|             # We also need it for non-PEP-517 packages
      213|             builder = SdistBuilder(
    > 214|                 Factory().create_poetry(pyproject.parent), NullEnv()
, NullIO()
      215|             )
      216|
      217|             with open(setup, "w", encoding="utf-8") as f:
      218|                 f.write(decode(builder.build_setup()))

I’ve followed SdistBuilder -> Builder on my environment and found the following on ~/.../python/3.7.7/lib/python3.7/site-packages/poetry/core/masonry/builders/builder.py (not in ~/.poetry but where python exists)

class Builder(object):
    AVAILABLE_PYTHONS = {"2", "2.7", "3", "3.4", "3.5", "3.6", "3.7"}

    format = None

    def __init__(
        self, poetry, ignore_packages_formats=False
    ):  # type: ("Poetry", "Env", "IO", bool) -> None
        self._poetry = poetry
        self._package = poetry.package

It seems the poetry-core version installed is wrong?

[lambdalisue]

It seems using pip 18.1 solves the issue for now. I’ll use the following as a workaround for this issue.

$ poetry env remove 3.7
$ poetry run pip install 'pip<19.0'
$ poetry install
$ poetry run python -c 'import package_a'
This is package A

Note that pip 19.0 implements PEP 517 and that cause 'setuptools' exception because no setuptools exists under the isolated environment for building.

[abn]

This should be fixed in the next preview release.