Como configurar o PYTHONPATH para um pacote instantâneo?

Question

Estou tentando tirar o pacote de um projeto python não puro. Eu usei o python plugin com scripts de compilação / instalação personalizados.

Este projeto contém 2 pacotes python necessários para o aplicativo para desktop:

• alfanous (API)
• alfanous-desktop (Qt PySide GUI)

snapcraft.yaml arquivo:

name: alfanous
version: "0.7.8"
summary: Alfanous
description: GNU hello prints a friendly greeting.
  This is part of the snapcraft tour at http://snapcraft.io/create/
#confinement: strict
confinement: devmode

apps:
  alfanous-gui:
    command: usr/bin/alfanous-desktop
    #desktop: usr/share/applications/my-app.desktop
  alfanous-cli:
    command: usr/bin/alfanous-console

parts:
  alfanous-git:
    build-packages:
      #- python
      - sqlite3
      - pyside-tools
      - qt4-linguist-tools
      - python-babel
      - qt4-qmake
      - python-setuptools
      #- python-pyparsing
      #- perl
    #plugin: make
    plugin: python
    python-version: python2
    #source: https://github.com/Alfanous-team/alfanous/archive/0.7.8.tar.gz
    source: https://github.com/Alfanous-team/alfanous.git
    source-type: git
    source-depth: 1
    #source-tag: 0.7.8
    build: |
      make build
    install: |
      echo _______#######:$(pwd)
      #make install_api 
      make install_api DESTDIR=$SNAPCRAFT_PART_INSTALL
      make install_desktop DESTDIR=$SNAPCRAFT_PART_INSTALL
    stage-packages:
      - python-pyparsing
      - python-pyside
      #- epydoc
      #- sphinx
      - python-babel
      - python-setuptools
    python-packages:
      - pyparsing
      - pyside
      - babel

O pacote snap é criado e instalado sem erros. No entanto, se eu tentar executá-lo:

$ alfanous.alfanous-cli
Traceback (most recent call last):
  File "/snap/alfanous/x3/usr/bin/alfanous-console", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/snap/alfanous/x3/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2927, in <module>
    @_call_aside
  File "/snap/alfanous/x3/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2913, in _call_aside
    f(*args, **kwargs)
  File "/snap/alfanous/x3/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2940, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/snap/alfanous/x3/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 635, in _build_master
    ws.require(__requires__)
  File "/snap/alfanous/x3/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 943, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/snap/alfanous/x3/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 829, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'alfanous==0.7.29' distribution was not found and is required by the application

Meu primeiro suspeito não é completo PYTHONPATH , tentando depurar:

snap run --shell alfanous.alfanous-cli
env | grep -i python

não traz nada.

e os dois pacotes estão lá:

$ ls /snap/alfanous/current/usr/lib/python2.7/site-packages/
alfanous                        alfanousDesktop
alfanous-0.7.29-py2.7.egg-info  alfanousDesktop-0.7.29-py2.7.egg-info

Como pude configurar PYTHONPATH corretamente? O plug-in python não deveria cuidar disso?

snapcraft v2.28 Ubuntu 16.04.2 LTS 64 bits

    

Answer 1

Eu modifiquei alfanous-console para imprimir sys.path e reconstruir o snap:

['/snap/alfanous/x4/usr/bin',
 '/snap/alfanous/x4/usr/lib/python2.7',
 '/snap/alfanous/x4/usr/lib/python2.7/plat-x86_64-linux-gnu',
 '/snap/alfanous/x4/usr/lib/python2.7/lib-tk',
 '/snap/alfanous/x4/usr/lib/python2.7/lib-old',
 '/snap/alfanous/x4/usr/lib/python2.7/lib-dynload',
 '/snap/alfanous/x4/usr/lib/python2.7/dist-packages']

Parece claro que o snap não inclui site-packages to PYTHONPATH em que meu pacote de destino se instala.

• Então eu tenho que modificar seu caminho de instalação

• Ou denuncie para a equipe de snap adicionar usr/lib/python2.7/site-packages

  Relacionado relatório de bug # 1670749: o confinamento clássico requer a configuração manual do PATH e do PYTHONPATH

  A solução sugerida não funcionou:

  apps:
    alfanous-gui:
      command: usr/bin/alfanous-desktop
      environment:
        PATH: $SNAP/usr/bin:$SNAP/bin/:$PATH
        PYTHONPATH: $SNAP/usr/lib/python2.7/site-packages:$SNAP/usr/lib/python2.7/dist-packages:$PYTHONPATH
      #desktop: usr/share/applications/my-app.desktop
    alfanous-cli:
      command: usr/bin/alfanous-console
      environment:
        PATH: $SNAP/usr/bin:$SNAP/bin/:$PATH
        PYTHONPATH: $SNAP/usr/lib/python2.7/site-packages:$SNAP/usr/lib/python2.7/dist-packages:$PYTHONPATH
  

  Por causa desse estranho caminho apontando para o host /home folder

  ['/snap/alfanous/x7/usr/bin',
   '/snap/alfanous/x7/usr/lib/python2.7/site-packages',
   '/snap/alfanous/x7/usr/lib/python2.7/dist-packages',
   '/usr/lib/python2.7/site-packages',
   '/usr/lib/python2.7/dist-packages',
   '/home/sneetsher/Desktop/sandbox/alfanous-snap',
   '/snap/alfanous/x7/usr/lib/python2.7',
   '/snap/alfanous/x7/usr/lib/python2.7/plat-x86_64-linux-gnu',
   '/snap/alfanous/x7/usr/lib/python2.7/lib-tk',
   '/snap/alfanous/x7/usr/lib/python2.7/lib-old',
   '/snap/alfanous/x7/usr/lib/python2.7/lib-dynload']