Installing toga-chart on Android fails - wheels for pygobject

[terminator-ger]

Describe the bug

Using either Linux Mint/ Windows building for android fails at building wheels for pygobject

(py-310) PS E:\dev\wrbattlesim> briefcase build android

[...]

Collecting setuptools
  Using cached setuptools-67.4.0-py3-none-any.whl (1.1 MB)
Building wheels for collected packages: pygobject, pycairo
  Building wheel for pygobject (PEP 517): started
  Building wheel for pygobject (PEP 517): finished with status 'error'
  ERROR: Command errored out with exit status 1:
   command: 'C:\Users\Michael\AppData\Local\Programs\Python\Python310\python.exe' 'E:\dev\wrbattlesim\android\gradle\WRBattleSim\app\build\generated\python\bp\pip\_vendor\pep517\_in_process.py' build_wheel 'C:\Users\Michael\AppData\Local\Temp\tmpm51vasy_'
       cwd: C:\Users\Michael\AppData\Local\Temp\pip-install-zon9ywuv\pygobject
  Complete output (39 lines):
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build\lib.win-amd64-cpython-310
  creating build\lib.win-amd64-cpython-310\pygtkcompat
  copying pygtkcompat\generictreemodel.py -> build\lib.win-amd64-cpython-310\pygtkcompat
  copying pygtkcompat\pygtkcompat.py -> build\lib.win-amd64-cpython-310\pygtkcompat
  copying pygtkcompat\__init__.py -> build\lib.win-amd64-cpython-310\pygtkcompat
  creating build\lib.win-amd64-cpython-310\gi
  copying gi\docstring.py -> build\lib.win-amd64-cpython-310\gi
  copying gi\importer.py -> build\lib.win-amd64-cpython-310\gi
  copying gi\module.py -> build\lib.win-amd64-cpython-310\gi
  copying gi\pygtkcompat.py -> build\lib.win-amd64-cpython-310\gi
  copying gi\types.py -> build\lib.win-amd64-cpython-310\gi
  copying gi\_constants.py -> build\lib.win-amd64-cpython-310\gi
  copying gi\_error.py -> build\lib.win-amd64-cpython
[console_out.txt](https://github.com/beeware/briefcase/files/10834000/console_out.txt)
-310\gi
  copying gi\_gtktemplate.py -> build\lib.win-amd64-cpython-310\gi
  copying gi\_option.py -> build\lib.win-amd64-cpython-310\gi
  copying gi\_ossighelper.py -> build\lib.win-amd64-cpython-310\gi
  copying gi\_propertyhelper.py -> build\lib.win-amd64-cpython-310\gi
  copying gi\_signalhelper.py -> build\lib.win-amd64-cpython-310\gi
  copying gi\__init__.py -> build\lib.win-amd64-cpython-310\gi
  creating build\lib.win-amd64-cpython-310\gi\repository
  copying gi\repository\__init__.py -> build\lib.win-amd64-cpython-310\gi\repository
  creating build\lib.win-amd64-cpython-310\gi\overrides
  copying gi\overrides\Gdk.py -> build\lib.win-amd64-cpython-310\gi\overrides
  copying gi\overrides\GdkPixbuf.py -> build\lib.win-amd64-cpython-310\gi\overrides
  copying gi\overrides\GIMarshallingTests.py -> build\lib.win-amd64-cpython-310\gi\overrides
  copying gi\overrides\Gio.py -> build\lib.win-amd64-cpython-310\gi\overrides
  copying gi\overrides\GLib.py -> build\lib.win-amd64-cpython-310\gi\overrides
  copying gi\overrides\GObject.py -> build\lib.win-amd64-cpython-310\gi\overrides
  copying gi\overrides\Gtk.py -> build\lib.win-amd64-cpython-310\gi\overrides
  copying gi\overrides\keysyms.py -> build\lib.win-amd64-cpython-310\gi\overrides
  copying gi\overrides\Pango.py -> build\lib.win-amd64-cpython-310\gi\overrides
  copying gi\overrides\__init__.py -> build\lib.win-amd64-cpython-310\gi\overrides
  running build_ext
  'pkg-config' not found.
  Arguments: ('pkg-config', '--print-errors', '--exists', 'glib-2.0 >= 2.56.0')
  ----------------------------------------
  ERROR: Failed building wheel for pygobject
  Building wheel for pycairo (PEP 517): started
  Building wheel for pycairo (PEP 517): finished with status 'error'
  ERROR: Command errored out with exit status 1:
   command: 'C:\Users\Michael\AppData\Local\Programs\Python\Python310\python.exe' 'E:\dev\wrbattlesim\android\gradle\WRBattleSim\app\build\generated\python\bp\pip\_vendor\pep517\_in_process.py' build_wheel 'C:\Users\Michael\AppData\Local\Temp\tmp8vafpeej'
       cwd: C:\Users\Michael\AppData\Local\Temp\pip-install-zon9ywuv\pycairo
  Complete output (12 lines):
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build\lib.win-amd64-cpython-310
  creating build\lib.win-amd64-cpython-310\cairo
  copying cairo\__init__.py -> build\lib.win-amd64-cpython-310\cairo
  copying cairo\__init__.pyi -> build\lib.win-amd64-cpython-310\cairo
  copying cairo\py.typed -> build\lib.win-amd64-cpython-310\cairo
  running build_ext
  'pkg-config' not found.
  Command ['pkg-config', '--print-errors', '--exists', 'cairo >= 1.15.10']
  ----------------------------------------
  ERROR: Failed building wheel for pycairo
Failed to build pygobject pycairo
ERROR: Could not build wheels for pygobject, pycairo which use PEP 517 and cannot be installed directly
Chaquopy: Exit status 1

console_out.txt

Steps to reproduce

1. checkout https://github.com/terminator-ger/wrbattlesim
2. briefcase build android

Expected behavior

Successful build of apk

Screenshots

No response

Environment

• Operating System: Linux Mint 20.03 / Win 10
• Python version: 3.10
• Software versions:
  • Briefcase: 0.3.12
  • Toga: 0.3.0

Logs

briefcase.2023_02_26-16_12_04.build.log

Additional context

No response

[mhsmith]

It shouldn't be installing pygobject for Android, but it gets brought in by the following chain: pygobject>=3.14.0->toga-gtk==0.3.0; sys_platform == "linux"->toga>=0.3.0.dev22->toga-chart. This is an awkward one, because sys_platform == "linux" is a condition that sometimes should match on Android, and sometimes shouldn't (chaquo/chaquopy#980 (comment)).

In this case, I don't think toga-chart would have worked on Android anyway, because Toga's Canvas implementation is incomplete for Android. Instead, try using matplotlib directly, as shown here.

[mhsmith]

@freakboy3742: This issue should maybe move to the toga-chart project, but I don't have access to do it myself.

[freakboy3742]

@mhsmith Eventually, I swear we'll get the permissions right on all the repos :-)

I think I've corrected that problem; but since I'm here I'll transfer the this ticket.

[terminator-ger]

I got my initial charts working with the approach described in (beeware/briefcase-android-gradle-template#52 (comment)). But it feels very unstable as upon adding a second plot my program segfaults and both examples given in the issue segfault as well.

[mhsmith]

OK, please create a separate issue for that in the Toga project, including the crash logs and the relevant sections of your code.