flet build windows not work

[nascin]

I'm trying to generate an executable, but the following error occurs, but it doesn't tell me much about what it could be.

How can I investigate this?

(_env) PS X:\DATAUP\projetos\Vatto\bot-enriquecimento-lista-2.0\bot_enriquecimento_lista> flet build windows
Creating Flutter bootstrap project from gh:flet-dev/flet-build-template with ref 0.22.1...OK
Customizing app icons and splash images...OK
Generating app icons...OK
Packaging Python app...Flet app package app/app.zip was not created.

[lekshmanmj]

please run build command with -vv at its end... and share the resultant log here

[nascin]

This was the way out:

Flutter executable: C:\src\flutter\bin\flutter.BAT
Dart executable: C:\src\flutter\bin\dart.BAT
Flutter bootstrap directory: C:\Users\mails\AppData\Local\Temp\flet_flutter_build_DpMvvnrMgj
Additional Flutter dependencies:
{}
Creating Flutter bootstrap project from gh:flet-dev/flet-build-template with ref 0.22.1...OK
Customizing app icons and splash images...Copying X:\DATAUP\projetos\Vatto\bot-enriquecimento-lista-2.0\bot_enriquecimento_lista\assets\icon.png to 
C:\Users\mails\AppData\Local\Temp\flet_flutter_build_DpMvvnrMgj\images
OK
Generating app icons...
Run subprocess: ['C:\\src\\flutter\\bin\\dart.BAT', 'run', 'flutter_launcher_icons']
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Resolving dependencies in `C:\Users\mails\AppData\Local\Temp\flet_flutter_build_DpMvvnrMgj`... (1.8s)
Downloading packages...
Got dependencies in `C:\Users\mails\AppData\Local\Temp\flet_flutter_build_DpMvvnrMgj`.
Building package executable... (1.0s)
Built flutter_launcher_icons:flutter_launcher_icons.
  ════════════════════════════════════════════
     FLUTTER LAUNCHER ICONS (v0.13.1)
  ════════════════════════════════════════════

• Creating default icons Android
• Overwriting the default Android launcher icon with a new icon
• Overwriting default iOS launcher icon with new icon
Creating Icons for Web...
Creating Icons for Windows...
Creating Icons for MacOS...

✓ Successfully generated launcher icons
OK
Packaging Python app...
Run subprocess: ['C:\\src\\flutter\\bin\\dart.BAT', 'run', 'serious_python:main', 'package',
'X:\\DATAUP\\projetos\\Vatto\\bot-enriquecimento-lista-2.0\\bot_enriquecimento_lista', '--dep-mappings', 'flet=flet-embed', 
'--req-deps', 'flet-embed', '--exclude', 'build', '--verbose']
Building package executable... 
Built serious_python:main.
Running package command
Creating asset directory: C:\Users\mails\AppData\Local\Temp\flet_flutter_build_DpMvvnrMgj\app
Copying Python app from X:\DATAUP\projetos\Vatto\bot-enriquecimento-lista-2.0\bot_enriquecimento_lista to C:\Users\mails\AppData\Local\Temp\serious_python_temp947e1d01
Error: FileSystemException: Failed to decode data using encoding 'utf-8', path = 'C:\Users\mails\AppData\Local\Temp\serious_python_temp947e1d01\requirements.txt'
Deleting temp directory C:\Users\mails\AppData\Local\Temp\serious_python_temp947e1d01
Deleting Flutter bootstrap directory C:\Users\mails\AppData\Local\Temp\flet_flutter_build_DpMvvnrMgj
Flet app package app/app.zip was not created.

[nascin]

It seems to me that the error occurs in:

Error: FileSystemException: Failed to decode data using encoding 'utf-8', path = 'C:\Users\mails\AppData\Local\Temp\serious_python_temp947e1d01\requirements.txt'

@FeodorFitsner, could you help me how do I fix this?

[ndonkoHenri]

Make sure your file is utf8-encoded.

[nascin]

I don't know how to resolve the error below:

(_env) PS C:\DATAUP\dataup-projects\Vatto\bot_enriquecimento_lista_4_0\bot_enriquecimento_lista> flet build windows -v
[22:37:57] Flutter bootstrap directory: C:\Users\mails\AppData\Local\Temp\flet_flutter_build_le9TECoWa1
           Additional Flutter dependencies:
           {}
[22:37:59] Created Flutter bootstrap project from gh:flet-dev/flet-build-template with ref 0.23.1 ✅
           Copying C:\DATAUP\dataup-projects\Vatto\bot_enriquecimento_lista_4_0\bot_enriquecimento_lista\assets\icon.png to C:\Users\mails\AppData\Local\Temp\flet_flutter_build_le9TECoWa1\images
           Customized app icons and splash images ✅
           Run subprocess: ['C:\\src\\flutter\\bin\\dart.BAT', 'run', 'flutter_launcher_icons']
(  ●   ) Generating app icons (1.9s)
Downloading packages... 
Got dependencies in `C:\Users\mails\AppData\Local\Temp\flet_flutter_build_le9TECoWa1`.
(   ●  ) Generating app icons (1.1s)
Built flutter_launcher_icons:flutter_launcher_icons.
(    ● ) Generating app icons ⏳...   ════════════════════════════════════════════
     FLUTTER LAUNCHER ICONS (v0.13.1)
  ════════════════════════════════════════════
  
(     ●) Generating app icons ⏳... • Creating default icons Android
• Overwriting the default Android launcher icon with a new icon
• Overwriting default iOS launcher icon with new icon
(●     ) Generating app icons ⏳... Creating Icons for Web...
Creating Icons for Windows...
Creating Icons for MacOS...
( ●    ) Generating app icons ⏳... 
✓ Successfully generated launcher icons
[22:38:03] Generated app icons ✅
           Run subprocess: ['C:\\src\\flutter\\bin\\dart.BAT', 'run', 'serious_python:main', 'package', 'C:\\DATAUP\\dataup-projects\\Vatto\\bot_enriquecimento_lista_4_0\\bot_enriquecimento_lista',
           '--dep-mappings', 'flet=flet-embed', '--req-deps', 'flet-embed', '--exclude', 'build']
(  ●   ) Packaging Python app ⏳... 
Built serious_python:main.
(   ●  ) Packaging Python app ⏳... Running package command
Creating asset directory: C:\Users\mails\AppData\Local\Temp\flet_flutter_build_le9TECoWa1\app
Copying Python app from C:\DATAUP\dataup-projects\Vatto\bot_enriquecimento_lista_4_0\bot_enriquecimento_lista to C:\Users\mails\AppData\Local\Temp\serious_python_temp173df19b
(    ● ) Packaging Python app ⏳... Error: FileSystemException: Failed to decode data using encoding 'utf-8', path = 'C:\Users\mails\AppData\Local\Temp\serious_python_temp173df19b\requirements.txt'
Deleting temp directory C:\Users\mails\AppData\Local\Temp\serious_python_temp173df19b
[22:38:04] Deleting Flutter bootstrap directory C:\Users\mails\AppData\Local\Temp\flet_flutter_build_le9TECoWa1
           Flet app package app/app.zip was not created.

[wtchen]

Going off of what @ndonkoHenri mentioned, your file is probably not UTF-8 encoded, which can happen if your text editor is using a weird encoding, or in cases if your requirements.txt is autogenerated. I would delete your requirements.txt and recreate it manually, making sure your editor is in UTF-8 mode.

[nascin]

I manually recreated the requirements.txt and it worked fine, but now another error occurred:

[11:53:35] Packaged Python app ✅
           Run subprocess: ['C:\\src\\flutter\\bin\\flutter.BAT', 'build', 'windows']
(  ●   ) Building Windows app ⏳... 
Downloading packages... 
(   ●  ) Building Windows app ⏳...   collection 1.18.0 (1.19.0 available)
  fl_chart 0.65.0 (0.68.0 available)
  flutter_lints 2.0.3 (4.0.0 available)
(  ●   ) Building Windows app ⏳...   flutter_markdown 0.6.23 (0.7.2+1 available)
  http_parser 4.0.2 (4.1.0 available)
  js 0.6.7 (0.7.1 available)
  lints 2.1.1 (4.0.0 available)
  material_color_utilities 0.8.0 (0.12.0 available)
  meta 1.12.0 (1.15.0 available)
! package_info_plus 8.0.0 (overridden)
  sensors_plus 4.0.2 (5.0.1 available)
! wakelock_plus 1.2.5 (overridden)
  web_socket_channel 2.4.5 (3.0.0 available)
Got dependencies!
11 packages have newer versions incompatible with dependency constraints.
Try `flutter pub outdated` for more information.
(    ● ) Building Windows app ⏳... 
(   ●  ) Building Windows app ⏳... windows/flutter/CMakeLists.txt does not use FLUTTER_TARGET_PLATFORM, updating.
(    ● ) Building Windows app ⏳... C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: O diretório Intermediário ou o diretório de Saída não podem residir sob o diretório Temporário porque isso poderia levar a problemas com a compilação incremental. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\ZERO_CHECK.vcxproj]    
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: O diretório Intermediário ou o diretório de Saída não podem residir sob o diretório Temporário porque isso poderia levar a problemas com a compilação incremental. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\plugins\serious_python_windows\CopyPythonDLLs.vcxproj]     
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: O diretório Intermediário ou o diretório de Saída não podem residir sob o diretório Temporário porque isso poderia levar a problemas com a compilação incremental. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\flutter\flutter_assemble.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: O diretório Intermediário ou o diretório de Saída não podem residir sob o diretório Temporário porque isso poderia levar a problemas com a compilação incremental. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\flutter\flutter_wrapper_app.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: O diretório Intermediário ou o diretório de Saída não podem residir sob o diretório Temporário porque isso poderia levar a problemas com a compilação incremental. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\flutter\flutter_wrapper_plugin.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: O diretório Intermediário ou o diretório de Saída não podem residir sob o diretório Temporário porque isso poderia levar a problemas com a compilação incremental. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\plugins\screen_retriever\screen_retriever_plugin.vcxproj]  
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: O diretório Intermediário ou o diretório de Saída não podem residir sob o diretório Temporário porque isso poderia levar a problemas com a compilação incremental. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\plugins\serious_python_windows\serious_python_windows_plugin.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.40.33807\include\format(42): warning STL4038: The contents of <format> are available only with C++20 or later. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\plugins\serious_python_windows\serious_python_windows_plugin.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: O diretório Intermediário ou o diretório de Saída não podem residir sob o diretório Temporário porque isso poderia levar a problemas com a compilação incremental. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\plugins\url_launcher_windows\url_launcher_windows_plugin.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: O diretório Intermediário ou o diretório de Saída não podem residir sob o diretório Temporário porque isso poderia levar a problemas com a compilação incremental. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\plugins\window_manager\window_manager_plugin.vcxproj]      
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: O diretório Intermediário ou o diretório de Saída não podem residir sob o diretório Temporário porque isso poderia levar a problemas com a compilação incremental. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\plugins\window_to_front\window_to_front_plugin.vcxproj]    
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: O diretório Intermediário ou o diretório de Saída não podem residir sob o diretório Temporário porque isso poderia levar a problemas com a compilação incremental. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\runner\bot_enriquecimento_lista.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: O diretório Intermediário ou o diretório de Saída não podem residir sob o diretório Temporário porque isso poderia levar a problemas com a compilação incremental. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\ALL_BUILD.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppBuild.targets(541,5): warning MSB8029: O diretório Intermediário ou o diretório de Saída não podem residir sob o diretório Temporário porque isso poderia levar a problemas com a compilação incremental. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\INSTALL.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: O comando "setlocal [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\INSTALL.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: "C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe" -DBUILD_TYPE=Release -P cmake_install.cmake [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\INSTALL.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: if %errorlevel% neq 0 goto :cmEnd [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\INSTALL.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: :cmEnd [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\INSTALL.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\INSTALL.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: :cmErrorLevel [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\INSTALL.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: exit /b %1 [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\INSTALL.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: :cmDone [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\INSTALL.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: if %errorlevel% neq 0 goto :VCEnd [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\INSTALL.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(166,5): error MSB3073: :VCEnd" foi encerrado com o código 1. [C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4\build\windows\x64\INSTALL.vcxproj]
Building Windows application...                                   131,7s
Build process failed.
[11:55:50] Deleting Flutter bootstrap directory C:\Users\mails\AppData\Local\Temp\flet_flutter_build_iDQJI3JZo4
[11:55:52] Run subprocess: ['C:\\src\\flutter\\bin\\flutter.BAT', '--version']
           Error building Flet app - see the log of failed command above.

[nascin]

I achieved!
Just reinstalling the visual studio tools