删除aws-sam-cli的python2-dev依赖项中断安装 [英] Removing python2-dev dependency break installtion of aws-sam-cli

问题描述

在以下docker文件中：

In the below docker file:

  FROM alpine:latest
  ENV HOME /home/samcli
  ENV PATH $HOME/.local/bin:$PATH 
  RUN mkdir /root/bin /aws; \ apk add --no-cache groff less bash python jq curl py-pip tzdata 
  RUN ln -fs /usr/share/zoneinfo/Etc/UTC /etc/localtime
  RUN apk add --no-cache --virtual .build-deps gcc python2-dev python3-dev linux-headers musl-dev && \ pip install --upgrade pip; \ adduser samcli -Du 5566; \ chown -R samcli $HOME; USER samcli WORKDIR $HOME
  RUN pip install --user --upgrade awscli aws-sam-cli; USER root 
  RUN apk del .build-deps; \ rm -rf /var/cache/apk/*

---

我们想删除 python2-dev 依赖性，因为python2将在2020年1月之后弃用。

---

We would like to remove python2-dev dependency, because python2 will be deprecated after Jan 2020.

如何删除python2依赖项？

How to remove python2 dependency?

推荐答案

通过删除 Python2-dev 将使用错误中断 aws-sam-cli 的安装错误：aws-sam-cli 0.19.0要求PyYAML〜= 3.12，但是您会具有不兼容的pyyaml 5.1。

By removing Python2-dev will break the installation of aws-sam-cli with error ERROR: aws-sam-cli 0.19.0 has requirement PyYAML~=3.12, but you'll have pyyaml 5.1 which is incompatible.

要克服此错误，您需要安装 PyYAML == 3.12 ，但是同样，您将需要更多的依赖关系才能成功完成此安装，因此我建议您使用python基本映像来避免安装这些在您的Dockerfile中批量依赖。

To overcome this error you need to install the PyYAML==3.12, but again you will need more dependency to make this installation successfully so I will recommend using python base image to avoid installation of these bulk dependecny in your Dockerfile.

另一件事， apk add --no-cache groff less bash python 这将会安装 python2 而不是 python3 ，因此删除python-dev2毫无意义。

Another thing, apk add --no-cache groff less bash python this will install python2 not python3so by removing python-dev2 is meaningless.

这是工作中的DockerFile，具有对 ERROR的修复：aws-sam-cli 0.19.0具有PyYAML〜= 3.12的要求，但是您会带有不兼容的pyyaml 5.1

Here is the working DockerFile which have fix for ERROR: aws-sam-cli 0.19.0 has requirement PyYAML~=3.12, but you'll have pyyaml 5.1 which is incompatible

FROM python:3.7-alpine3.9

ENV HOME /home/samcli
ENV PATH $HOME/.local/bin:$PATH
RUN ln -fs /usr/share/zoneinfo/Etc/UTC /etc/localtime
RUN apk add --no-cache --virtual .build-deps  python3-dev gcc linux-headers musl-dev && \
    adduser samcli -Du 5566; \
    chown -R samcli $HOME;
RUN apk add --no-cache groff less bash jq curl py-pip tzdata
RUN pip install PyYAML==3.12
USER samcli

WORKDIR $HOME
RUN pip install --user --upgrade awscli aws-sam-cli;
USER root

RUN apk del .build-deps; \
    rm -rf /var/cache/apk/*

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