Build with platformio 4

[mcspr]

cc @Niek , can you please try the ESPURNA_PIO_SHARED_LIBRARIES=1 stuff?

• use generic env section
• all envs are streamlined to just board=... and build_flags=...
• travis does not use py3 (yet, but i wonder if we can just use py3 syntax straight away)
  and references current rc1 commit platformio/platformio-core@8d459d8, since there is no pre-release on pypi

nightly builder can then verify that every env builder works, at least dumb mistakes like flash size would be caught

[Niek]

I like the massive platformio.ini cleanup :) Building with ESPURNA_PIO_SHARED_LIBRARIES=1 works fine, but the shared_libdeps_dir (code/libraries) is not in the .gitignore - you might want to add that.

[mcspr]

PR & documentation:
platformio/platformio-core#1643
http://docs.platformio.org/en/latest/projectconf/section_env.html#global-scope-env

Will update .gitignore

Previous .piolibdeps catching looks iffy too, probably it should use global storage based on travis env (~/.platformio/lib)
I also wonder if there's any problem always having shared libraries/ dir enabled

[Niek]

I'm not sure if it's a bug in PIO (4.0-rc4) or related to this PR, but I noticed building with a core different than 2.4.x I get this error:

TypeError: expected string or buffer:
  File "~/.platformio/penv/lib/python2.7/site-packages/platformio/builder/main.py", line 126:
    env.SConscript("$BUILD_SCRIPT")
  File "~/.platformio/packages/tool-scons/script/../engine/SCons/Script/SConscript.py", line 541:
    return _SConscript(self.fs, *files, **subst_kw)
  File "/~/.platformio/packages/tool-scons/script/../engine/SCons/Script/SConscript.py", line 250:
    exec _file_ in call_stack[-1].globals
  File "~/.platformio/platforms/espressif8266/builder/main.py", line 255:
    env.get("UPLOAD_PORT", ""))):
  File "~/.platformio/penv/lib/python2.7/re.py", line 141:
    return _compile(pattern, flags).match(string)

[mcspr]

Is this using -ota env and platform = espressif8266@2.2.2, with defined ESPURNA_IP & ESPURNA_AUTH (if yes, what is ESPURNA_IP value)?
What is env.get("UPLOAD_PORT") value? You can use print(), somewhere before that failing re.match call.

[Niek]

Yes, @2.2.2 and -ota - but I just noticed I forgot to update my env from common.upload_port to common.ota_upload_port, my bad. However, after fixing this the error becomes (same with non-ota envs):

KeyError: 'FRAMEWORK_ARDUINOESP8266_DIR':
  File "~/.platformio/penv/lib/python2.7/site-packages/platformio/builder/main.py", line 134:
    env.SConscript(item, exports="env")
  File "~/.platformio/packages/tool-scons/script/../engine/SCons/Script/SConscript.py", line 541:
    return _SConscript(self.fs, *files, **subst_kw)
  File "~/.platformio/packages/tool-scons/script/../engine/SCons/Script/SConscript.py", line 250:
    exec _file_ in call_stack[-1].globals
  File "~/Documents/Code/twine-firmware/code/extra_scripts.py", line 145:
    patch_lwip()
  File "~/Documents/Code/twine-firmware/code/extra_scripts.py", line 100:
    framework_dir = env["FRAMEWORK_ARDUINOESP8266_DIR"]
  File "~/.platformio/packages/tool-scons/script/../engine/SCons/Environment.py", line 410:
    return self._dict[key]

Maybe this env var is no longer set in 2.2.2?

[Niek]

This fixed it for me (in extra_scripts.py):

framework_dir = platform.get_package_dir("framework-arduinoespressif8266")

I tested and this works in 2.3.0 up to including 2.5.2.