Support MacOS (Python 3.9)

Tested with Python 3.9, but no 3.9-specific issues popped up
Deployment scripts fail

Backend fails due to cairo

2021-01-20 12:31:43,948 - INFO - shapeflow.server - serving on http://127.0.0.1:7951
2021-01-20 12:31:44,554 - INFO - shapeflow.server - opening a browser window...
ERROR:shapeflow.server:Exception on /favicon.ico [GET]
Traceback (most recent call last):
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 2447, in wsgi_app
  response = self.full_dispatch_request()
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 1952, in full_dispatch_request
  rv = self.handle_user_exception(e)
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 1821, in handle_user_exception
  reraise(exc_type, exc_value, tb)
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/_compat.py", line 39, in reraise
  raise value
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 1950, in full_dispatch_request
  rv = self.dispatch_request()
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 1936, in dispatch_request
  return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/server.py", line 94, in _get_file
  return self.get_file(file)
File "/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/server.py", line 175, in get_file
  raise FileNotFoundError
FileNotFoundError
2021-01-20 12:31:45,512 - WARNING - waitress.queue - Task queue depth is 1
2021-01-20 12:31:45,583 - ERROR - shapeflow.server - 'get_settings' - OSError: no library called "cairo" was found no library called "libcairo-2" was found cannot load library 'libcairo.so.2': dlopen(libcairo.so.2, 2): image not found cannot load library 'libcairo.2.dylib': dlopen(libcairo.2.dylib, 2): image not found cannot load library 'libcairo-2.dll': dlopen(libcairo-2.dll, 2): image not found
2021-01-20 12:31:45,583 - ERROR - shapeflow.server - 'stop_events' - ImportError: cannot import name 'load' from 'shapeflow.main' (/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/main.py)
2021-01-20 12:31:45,584 - ERROR - shapeflow.server - 'schemas' - ImportError: cannot import name 'load' from 'shapeflow.main' (/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/main.py)
2021-01-20 12:31:45,584 - ERROR - shapeflow.server - 'va/state' - ImportError: cannot import name 'load' from 'shapeflow.main' (/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/main.py)
ERROR:shapeflow.server:Exception on /api/get_settings [GET]
Traceback (most recent call last):
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 2447, in wsgi_app
  response = self.full_dispatch_request()
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 1952, in full_dispatch_request
  rv = self.handle_user_exception(e)
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 1821, in handle_user_exception
  reraise(exc_type, exc_value, tb)
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/_compat.py", line 39, in reraise
  raise value
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 1950, in full_dispatch_request
  rv = self.dispatch_request()
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 1936, in dispatch_request
  return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/server.py", line 98, in _call_api
  return self.call_api(address)
File "/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/server.py", line 245, in call_api
  raise e
File "/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/server.py", line 224, in call_api
  result = self.api.dispatch(address, **kwargs)
File "/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/server.py", line 285, in api
  from shapeflow.main import load
File "/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/main.py", line 21, in <module>
  from OnionSVG import check_svg
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/OnionSVG/__init__.py", line 2, in <module>
  import cairosvg as csvg
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/cairosvg/__init__.py", line 26, in <module>
  from . import surface  # noqa isort:skip
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/cairosvg/surface.py", line 9, in <module>
  import cairocffi as cairo
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/cairocffi/__init__.py", line 48, in <module>
  cairo = dlopen(
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/cairocffi/__init__.py", line 45, in dlopen
  raise OSError(error_message)  # pragma: no cover
OSError: no library called "cairo" was found
no library called "libcairo-2" was found
cannot load library 'libcairo.so.2': dlopen(libcairo.so.2, 2): image not found
cannot load library 'libcairo.2.dylib': dlopen(libcairo.2.dylib, 2): image not found
cannot load library 'libcairo-2.dll': dlopen(libcairo-2.dll, 2): image not found
ERROR:shapeflow.server:Exception on /api/stop_events [POST]
Traceback (most recent call last):
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 2447, in wsgi_app
  response = self.full_dispatch_request()
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 1952, in full_dispatch_request
  rv = self.handle_user_exception(e)
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 1821, in handle_user_exception
  reraise(exc_type, exc_value, tb)
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/_compat.py", line 39, in reraise
  raise value
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 1950, in full_dispatch_request
  rv = self.dispatch_request()
File "/Users/yura/temp/test-shapeflow/shapeflow/.venv/lib/python3.9/site-packages/flask/app.py", line 1936, in dispatch_request
  return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/server.py", line 98, in _call_api
  return self.call_api(address)
File "/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/server.py", line 245, in call_api
  raise e
File "/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/server.py", line 224, in call_api
  result = self.api.dispatch(address, **kwargs)
File "/Users/yura/temp/test-shapeflow/shapeflow/shapeflow/server.py", line 285, in api
  from shapeflow.main import load
  ...

After brew install cairo, backend fails with

2021-01-20 12:34:09,714 - INFO - shapeflow.server - serving on http://127.0.0.1:7951
2021-01-20 12:34:10,321 - INFO - shapeflow.server - opening a browser window...
2021-01-20 12:34:10.735 Python[72800:968840] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'NSWindow drag regions should only be invalidated on the Main Thread!'
*** First throw call stack:
(
  0   CoreFoundation                      0x00007fff204c56af __exceptionPreprocess + 242
  1   libobjc.A.dylib                     0x00007fff201fd3c9 objc_exception_throw + 48
  2   CoreFoundation                      0x00007fff204eda9a -[NSException raise] + 9
  3   AppKit                              0x00007fff22c918a0 -[NSWindow(NSWindow_Theme) _postWindowNeedsToResetDragMarginsUnlessPostingDisabled] + 321
  4   AppKit                              0x00007fff22c7c561 -[NSWindow _initContent:styleMask:backing:defer:contentView:] + 1375
  5   AppKit                              0x00007fff22c7bffb -[NSWindow initWithContentRect:styleMask:backing:defer:] + 42
  6   libtk8.6.dylib                      0x000000013870b2a8 TkMacOSXMakeRealWindowExist + 694
  7   libtk8.6.dylib                      0x000000013870aec4 TkWmMapWindow + 63
  8   libtk8.6.dylib                      0x0000000138671613 Tk_MapWindow + 158
  9   libtk8.6.dylib                      0x0000000138679fdb MapFrame + 59
  10  libtcl8.6.dylib                     0x00000001385b85a2 TclServiceIdle + 75
  11  libtcl8.6.dylib                     0x000000013859cf03 Tcl_DoOneEvent + 337
  12  libtk8.6.dylib                      0x00000001386fe2e3 TkpInit + 762
  13  libtk8.6.dylib                      0x0000000138672855 Initialize + 2402
  14  _tkinter.cpython-39-darwin.so       0x00000001384cf715 Tcl_AppInit + 84
  15  _tkinter.cpython-39-darwin.so       0x00000001384caa04 _tkinter_create + 987
  16  Python                              0x0000000107cd71bb cfunction_vectorcall_FASTCALL + 203
  17  Python                              0x0000000107d4eff3 call_function + 403
  18  Python                              0x0000000107d4c184 _PyEval_EvalFrameDefault + 27452
  19  Python                              0x0000000107d4fb3b _PyEval_EvalCode + 1998
  20  Python                              0x0000000107ca75d8 _PyFunction_Vectorcall + 248
  21  Python                              0x0000000107ca6e67 _PyObject_FastCallDictTstate + 212
  22  Python                              0x0000000107ca7891 _PyObject_Call_Prepend + 139
  23  Python                              0x0000000107cefe96 slot_tp_init + 87
  24  Python                              0x0000000107ce96f7 type_call + 150
  25  Python                              0x0000000107ca6fa3 _PyObject_MakeTpCall + 266
  26  Python                              0x0000000107d4f027 call_function + 455
  27  Python                              0x0000000107d4c184 _PyEval_EvalFrameDefault + 27452
  28  Python                              0x0000000107ca7648 function_code_fastcall + 97
  29  Python                              0x0000000107ca6e67 _PyObject_FastCallDictTstate + 212
  30  Python                              0x0000000107ca7891 _PyObject_Call_Prepend + 139
  31  Python                              0x0000000107cefe96 slot_tp_init + 87
  32  Python                              0x0000000107ce96f7 type_call + 150
  33  Python                              0x0000000107ca6fa3 _PyObject_MakeTpCall + 266
  34  Python                              0x0000000107d4f027 call_function + 455
  35  Python                              0x0000000107d4c230 _PyEval_EvalFrameDefault + 27624
  36  Python                              0x0000000107d4fb3b _PyEval_EvalCode + 1998
  37  Python                              0x0000000107d4556d PyEval_EvalCode + 79
  38  Python                              0x0000000107d428a7 builtin_exec + 581
  39  Python                              0x0000000107cd71bb cfunction_vectorcall_FASTCALL + 203
  40  Python                              0x0000000107d4c5a9 _PyEval_EvalFrameDefault + 28513
  41  Python                              0x0000000107d4fb3b _PyEval_EvalCode + 1998
  42  Python                              0x0000000107ca75d8 _PyFunction_Vectorcall + 248
  43  Python                              0x0000000107d4eff3 call_function + 403
  44  Python                              0x0000000107d4c184 _PyEval_EvalFrameDefault + 27452
  45  Python                              0x0000000107ca7648 function_code_fastcall + 97
  46  Python                              0x0000000107d4eff3 call_function + 403
  47  Python                              0x0000000107d4c168 _PyEval_EvalFrameDefault + 27424
  48  Python                              0x0000000107ca7648 function_code_fastcall + 97
  49  Python                              0x0000000107d4eff3 call_function + 403
  50  Python                              0x0000000107d4c230 _PyEval_EvalFrameDefault + 27624
  51  Python                              0x0000000107ca7648 function_code_fastcall + 97
  52  Python                              0x0000000107d4eff3 call_function + 403
  53  Python                              0x0000000107d4c230 _PyEval_EvalFrameDefault + 27624
  54  Python                              0x0000000107ca7648 function_code_fastcall + 97
  55  Python                              0x0000000107ca8697 object_vacall + 402
  56  Python                              0x0000000107ca87fe _PyObject_CallMethodIdObjArgs + 248
  57  Python                              0x0000000107d6ace5 PyImport_ImportModuleLevelObject + 1179
  58  Python                              0x0000000107d4ab88 _PyEval_EvalFrameDefault + 21824
  59  Python                              0x0000000107d4fb3b _PyEval_EvalCode + 1998
  60  Python                              0x0000000107d4556d PyEval_EvalCode + 79
  61  Python                              0x0000000107d428a7 builtin_exec + 581
  62  Python                              0x0000000107cd71bb cfunction_vectorcall_FASTCALL + 203
  63  Python                              0x0000000107d4c5a9 _PyEval_EvalFrameDefault + 28513
  64  Python                              0x0000000107d4fb3b _PyEval_EvalCode + 1998
  65  Python                              0x0000000107ca75d8 _PyFunction_Vectorcall + 248
  66  Python                              0x0000000107d4eff3 call_function + 403
  67  Python                              0x0000000107d4c184 _PyEval_EvalFrameDefault + 27452
  68  Python                              0x0000000107ca7648 function_code_fastcall + 97
  69  Python                              0x0000000107d4eff3 call_function + 403
  70  Python                              0x0000000107d4c168 _PyEval_EvalFrameDefault + 27424
  71  Python                              0x0000000107ca7648 function_code_fastcall + 97
  72  Python                              0x0000000107d4eff3 call_function + 403
  73  Python                              0x0000000107d4c230 _PyEval_EvalFrameDefault + 27624
  74  Python                              0x0000000107ca7648 function_code_fastcall + 97
  75  Python                              0x0000000107d4eff3 call_function + 403
  76  Python                              0x0000000107d4c230 _PyEval_EvalFrameDefault + 27624
  77  Python                              0x0000000107ca7648 function_code_fastcall + 97
  78  Python                              0x0000000107ca8697 object_vacall + 402
  79  Python                              0x0000000107ca87fe _PyObject_CallMethodIdObjArgs + 248
  80  Python                              0x0000000107d6ace5 PyImport_ImportModuleLevelObject + 1179
  81  Python                              0x0000000107d4ab88 _PyEval_EvalFrameDefault + 21824
  82  Python                              0x0000000107ca7648 function_code_fastcall + 97
  83  Python                              0x0000000107caeec7 property_descr_get + 114
  84  Python                              0x0000000107cdab4d _PyObject_GenericGetAttrWithDict + 177
  85  Python                              0x0000000107d4a5e7 _PyEval_EvalFrameDefault + 20383
  86  Python                              0x0000000107ca7648 function_code_fastcall + 97
  87  Python                              0x0000000107d4eff3 call_function + 403
  88  Python                              0x0000000107d4c168 _PyEval_EvalFrameDefault + 27424
  89  Python                              0x0000000107d4fb3b _PyEval_EvalCode + 1998
  90  Python                              0x0000000107ca75d8 _PyFunction_Vectorcall + 248
  91  Python                              0x0000000107ca731f PyVectorcall_Call + 146
  92  Python                              0x0000000107d4c4b4 _PyEval_EvalFrameDefault + 28268
  93  Python                              0x0000000107ca7648 function_code_fastcall + 97
  94  Python                              0x0000000107d4eff3 call_function + 403
  95  Python                              0x0000000107d4c168 _PyEval_EvalFrameDefault + 27424
  96  Python                              0x0000000107ca7648 function_code_fastcall + 97
  97  Python                              0x0000000107d4eff3 call_function + 403
  98  Python                              0x0000000107d4c168 _PyEval_EvalFrameDefault + 27424
  99  Python                              0x0000000107ca7648 function_code_fastcall + 97
  100 Python                              0x0000000107d4eff3 call_function + 403
  101 Python                              0x0000000107d4c168 _PyEval_EvalFrameDefault + 27424
  102 Python                              0x0000000107ca7648 function_code_fastcall + 97
  103 Python                              0x0000000107ca6e67 _PyObject_FastCallDictTstate + 212
  104 Python                              0x0000000107ca7891 _PyObject_Call_Prepend + 139
  105 Python                              0x0000000107cef2fb slot_tp_call + 87
  106 Python                              0x0000000107ca6fa3 _PyObject_MakeTpCall + 266
  107 Python                              0x0000000107d4f027 call_function + 455
  108 Python                              0x0000000107d4c184 _PyEval_EvalFrameDefault + 27452
  109 Python                              0x0000000107d4fb3b _PyEval_EvalCode + 1998
  110 Python                              0x0000000107ca75d8 _PyFunction_Vectorcall + 248
  111 Python                              0x0000000107d4eff3 call_function + 403
  112 Python                              0x0000000107d4c168 _PyEval_EvalFrameDefault + 27424
  113 Python                              0x0000000107ca7648 function_code_fastcall + 97
  114 Python                              0x0000000107d4eff3 call_function + 403
  115 Python                              0x0000000107d4c168 _PyEval_EvalFrameDefault + 27424
  116 Python                              0x0000000107ca7648 function_code_fastcall + 97
  117 Python                              0x0000000107d4eff3 call_function + 403
  118 Python                              0x0000000107d4c168 _PyEval_EvalFrameDefault + 27424
  119 Python                              0x0000000107ca7648 function_code_fastcall + 97
  120 Python                              0x0000000107ca93ae method_vectorcall + 423
  121 Python                              0x0000000107d4c4b4 _PyEval_EvalFrameDefault + 28268
  122 Python                              0x0000000107ca7648 function_code_fastcall + 97
  123 Python                              0x0000000107d4eff3 call_function + 403
  124 Python                              0x0000000107d4c168 _PyEval_EvalFrameDefault + 27424
  125 Python                              0x0000000107ca7648 function_code_fastcall + 97
  126 Python                              0x0000000107d4eff3 call_function + 403
  127 Python                              0x0000000107d4c168 _PyEval_EvalFrameDefault + 27424
  128 Python                              0x0000000107ca7648 function_code_fastcall + 97
  129 Python                              0x0000000107ca9337 method_vectorcall + 304
  130 Python                              0x0000000107dc9acf t_bootstrap + 70
  131 Python                              0x0000000107d89424 pythread_wrapper + 25
  132 libsystem_pthread.dylib             0x00007fff20353950 _pthread_start + 224
  133 libsystem_pthread.dylib             0x00007fff2034f47b thread_start + 15
)
libc++abi.dylib: terminating with uncaught exception of type NSException
[1]    72800 abort      python sf.py

ybnd / shapeflow

Support MacOS (Python 3.9) #28