None is not allowed for bootstrap

[RobertFlatt]

Versions

• Python: 3.8.2
• OS: Windows 10/WSL
• Kivy: 2.0.0c2
• Cython: 0.29.17

Description

Using p4a master 5/15/2020 and python-for-android==2020.4.29 neither from Buildozer

[INFO]:    # Your distribution was created successfully, exiting.
[INFO]:    Dist can be found at (for now) /home/bobf/.local/share/python-for-android/dists/fl__arm64-v8a
[INFO]:    Of the existing distributions, the following meet the given requirements:
[INFO]:         fl: min API 21, includes recipes (hostpython3, libffi, openssl, sdl2_image, sdl2_mixer, sdl2_ttf, sqlite3, python3, sdl2, setuptools, six, pyjnius, android, kivy, certifi), built for archs (arm64-v8a)
[INFO]:    fl has compatible recipes, using this one
Traceback (most recent call last):
  File "/home/bobf/.local/bin/p4a", line 8, in <module>
    sys.exit(main())
  File "/home/bobf/.local/lib/python3.8/site-packages/pythonforandroid/entrypoints.py", line 18, in main
    ToolchainCL()
  File "/home/bobf/.local/lib/python3.8/site-packages/pythonforandroid/toolchain.py", line 692, in __init__
    getattr(self, command)(args)
  File "/home/bobf/.local/lib/python3.8/site-packages/pythonforandroid/toolchain.py", line 155, in wrapper_func
    func(self, args, **kw)
  File "/home/bobf/.local/lib/python3.8/site-packages/pythonforandroid/toolchain.py", line 1111, in apk
    output, build_args = self._build_package(args, package_type='apk')
  File "/home/bobf/.local/lib/python3.8/site-packages/pythonforandroid/toolchain.py", line 1004, in _build_package
    ctx.prepare_bootstrap(bs)
  File "/home/bobf/.local/lib/python3.8/site-packages/pythonforandroid/build.py", line 480, in prepare_bootstrap
    raise TypeError("None is not allowed for bootstrap")
TypeError: None is not allowed for bootstrap

Worakaround is the long unrequired .p4a option:
--bootstrap=sdl2

buildozer.spec

Command:

// REPLACE ME: buildozer command ran? e.g. buildozer android debug

Spec file:

// REPLACE ME: Paste your buildozer.spec file here

Logs

// REPLACE ME: Paste the build ouput containing the error

[mnba]

Not enough input provided, particularly bulldozer.spec is empty, particularly interesting in this regard is the value of bootstrap: it should be either 'kivy' or 'webview'. Probably you provided nothing which become None

[RobertFlatt]

Using from p4a not from Buildozer ("Using p4a master 5/15/2020 and python-for-android==2020.4.29 neither from Buildozer")

Probably you provided nothing which become None

Exactly

Providing nothing was functional behavior until this release. Obviously the workaround is trivial, but the behavior did change.