tmpdir path too long on macOS

[adamjstewart]

I have a unit test that runs gpg. First we set GNUPGHOME to the temporary directory that pytest creates, then we run it using our own keys. However, gpg fails with the following error:

gpg: keybox '/private/var/folders/21/hwq39zyj4g36x6zjfyl5l8080000gn/T/pytest-of-Adam/pytest-5/test_buildcache0/gpg/pubring.kbx' created
gpg: can't connect to the agent: File name too long
gpg: agent_genkey failed: No agent running
gpg: key generation failed: No agent running

According to https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=847206, gpg cannot handle long paths. Is there any way to shorten /private/var/folders/21/hwq39zyj4g36x6zjfyl5l8080000gn/T/pytest-of-Adam/pytest-5/test_buildcache0/gpg/pubring.kbx?

platform darwin -- Python 3.7.3, pytest-3.2.5, py-1.4.34, pluggy-0.4.0

Possibly related to #291

[adamjstewart]

Hmm, didn't realize I was using such an ancient version of pytest. It looks like 3.2.5 is the last version that supports Python 2.6. I assume this bug has been fixed in newer versions of pytest, so I'll close this unless I find a way to reproduce it.

[adamjstewart]

Hmm, but #291 was claimed to be fixed long before pytest 3.2.5. Reopening...

[RonnyPfannschmidt]

indeed, thats a different issue (full path vs path component)

as a workaround you can probably use --basetemp and manage the creation/destruction/naming of the tmpdir (pytest will reset the content of the given directory)

[nicoddemus]

Closing this for now, seems like using --basetemp is a good workaround. Feel free to chip in if we should re-open.

[The-Compiler]

FWIW I have this in my testsuite for a similar issue:

@pytest.fixture()
def short_tmpdir():
    with tempfile.TemporaryDirectory() as tdir:
        yield py.path.local(tdir)

[yihuang]

FWIW I have this in my testsuite for a similar issue:

@pytest.fixture()
def short_tmpdir():
    with tempfile.TemporaryDirectory() as tdir:
        yield py.path.local(tdir)

this solution will cleanup dir automatically after test, not good for development.
seems --basetemp is good, the only thing is you can't configure it in ini, have to pass it in every run.

[koffie]

could it at least be made easier to use this workaround and make basetmp something that is configurable in the pytest config file so that I don;t need to remember it passing it as an option every single time?

[The-Compiler]

You can configure any command line option in the config via addopts.

[yihuang]

Another solution is just set env var TMPDIR=/tmp in current profile.

[koffie]

@The-Compiler

Thanks, that works.

For some reason I was expecting:
to work

[tool:pytest]
basetemp = /tmp/pytest

but luckily

[tool:pytest]
addopts = --basetemp=/tmp/pytest

does exactly what I want

[RonnyPfannschmidt]

@koffie please note that the basepmp option deletes the target folder

[koffie]

@RonnyPfannschmidt thanks for the heads up. That is why I created a specific folder for pyrest tests and used --basetemp=/tmp/pytest so that my other temporary files keep existing (at least temporarily). And also why I did not do --basetemp=/tmp. Or are you implying that there is also a way of achieving the same result without deleting the target folder?

[RonnyPfannschmidt]

@koffie current there isn't, but people miss the delete sometimes