Question

我是Docker的新手。我正在使用“复制”命令复制一些文件，并且工作正常。但是，当我将这些复制命令添加到IF / ElSE语句时，它停止工作并显示错误returned a non-zero code: 127。请在下面找到我正在使用的代码。

RUN if [ "$FRONT_END_BUILD" = "false" ]; then \
      echo "front resources need not to copy" $FRONT_END_BUILD; \
  else \
    COPY --from=build /application/test.php /application/test.php;\
    COPY --from=build /application/reactPage.blade.php /application/reactPage.blade.php;\
    COPY --from=build /application/reactPageBlank.blade.php /application/reactPageBlank.blade.php;\
  fi

Answer 1

也许你可以做到。

COPY --from=build /application/test.php /application/test.php.backup
COPY --from=build /application/reactPage.blade.php /application/reactPage.blade.php.backup
COPY --from=build /application/reactPageBlank.blade.php /application/reactPageBlank.blade.php.backup

RUN if [ "$FRONT_END_BUILD" = "false" ]; then \
      echo "front resources need not to copy" $FRONT_END_BUILD; \
  else \
    mv /application/test.php.backup /application/test.php;\
    mv /application/reactPage.blade.php.backup /application/reactPage.blade.php;\
    mv /application/reactPageBlank.blade.php.backup /application/reactPageBlank.blade.php;\
  fi

Answer 2

您可以执行以下操作（虚拟Dockerfile）：

FROM node:10.8-stretch as build

RUN mkdir -p /application/
WORKDIR /application
RUN touch .emptyfile
RUN ls -l

FROM alpine:3.4 

ENV TEMP = "false" 
ENV First = ""

RUN if [ "TEMP" = "false" ]; then \
      echo "front end is not required"; \
  else \
      echo "helo";\
  fi 


COPY --from=build /application/.emptyfile /application/resources/views/admin/master.blade.php* /bin/

要聚焦的线是

COPY --from=build /application/.emptyfile /application/resources/views/admin/master.blade.php* /bin/

此行的作用是将复制/application/.emptyfile（这只是一个虚拟占位符文件），并将此/application/resources/views/admin/master.blade.php*保留为可选。

Dockerfile复制命令不适用于IF / Else

2 个答案: