Snapcraft python 只打包依赖,不打包应用?

Snapcraft python only packages dependencies, not app?

我有一个非常标准的 python 应用程序,包括 setup.pyrequirements.txt,可以很好地安装 pip:

$ pip install .
$ tree -L 1 env/lib/python3.5/site-packages/

env2/lib/python3.5/site-packages/
├── myAPP 
├── myAPP-0.1.0-py3.5.egg-info
...

我想使用快照来构建和部署应用程序,并注意到 snapcraft 只安装我的应用程序的依赖项,而不是应用程序本身。它确实构建了一个轮子,但没有安装它:

$ snapcraft
....
Building wheels for collected packages: myAPP, blist
...
Successfully built myAPP blist
/home/ubuntu/parts/myAPP/install/usr/bin/python3 -m pip install --user 
    --no-compile --disable-pip-version-check --no-index 
    --find-links /home/ubuntu/parts/myAPP/packages blist 
    <other_requirements> --no-deps --upgrade

有谁知道为什么 myAPP 不是 pip 安装的一部分?

作为参考,snapcraft.yaml 在这个阶段非常简单,但我认为应该是所有需要的。 Snapcraft v2.27.1 Ubuntu 16.04

name: myAPP
version: '0.0.1'
summary: myAPP web application
description: |
  myAPP main web application

grade: devel 
confinement: strict

apps:
  myAPP:
    command: gunicorn myApp.wsgi
    daemon: simple
    plugs:
      - network-bind

parts:
  myAPP:
    plugin: python
    python-version: python3
    source: /opt/backend/

进度

我检查了构建应用程序后安装了哪些包:

$ parts/myAPP/install/bin/pip list --format columns
Package                 Version  Location           
----------------------- -------- -------------------
appdirs                 1.4.2    
blist                   1.3.6    
myAPP                   0.1.0    /opt/backend
....

如果我随后手动重新 运行 pip install -U myAPP,它确实会包含在 site-packages 中。看看我是否可以单独重复其他构建步骤。

通过修补 snapcraft python 插件(在 /usr/lib/python3/dist-packages/snapcraft/plugins/python.py 我的系统上)找到了解决方法:

--- /usr/lib/python3/dist-packages/snapcraft/plugins/python.py  2017-02-17 13:45:14.000000000 +0000
+++ python.py   2017-03-02 01:53:54.993148168 +0000
@@ -298,7 +298,7 @@
                 # we want to avoid installing what is already provided in
                 # stage-packages
                 need_install = [k for k in wheel_names if k not in installed]
-                pip.install(need_install + ['--no-deps', '--upgrade'])
+                pip.install(wheel_names + ['--no-deps', '--upgrade', '--ignore-installed'])

     def _fix_permissions(self):
         for root, dirs, files in os.walk(self.installdir):

我希望这个问题可能有更简洁的解决方案?同时,您可以将上面的补丁复制到名为patch.diff的文件中并应用:

sudo patch -b /usr/lib/python3/dist-packages/snapcraft/plugins/python.py patch.diff