dockerfile don't support .bashrc environment variable

[zjb0807]

• This is a bug report
• This is a feature request
• I searched existing issues before opening this one

Dockerfile:

FROM ubuntu

RUN echo 'export GOROOT=/root/go' >> /root/.bashrc && \
    /bin/bash -c 'source /root/.bashrc && echo $GOROOT'

When i build images, echo $GOROOT will Printout empty, but if i change the dockerfile like this:

FROM ubuntu

RUN echo 'export GOROOT=/root/go' >> /root/bashrc && \
    /bin/bash -c 'source /root/bashrc && echo $GOROOT'

echo $GOROOT will Printout /root/go

Expected behavior

# docker build --no-cache -t test .
Sending build context to Docker daemon  2.048kB
Step 1/2 : FROM ubuntu
 ---> 735f80812f90
Step 2/2 : RUN echo 'export GOROOT=/root/go' >> /root/bashrc &&     /bin/bash -c 'source /root/bashrc && echo $GOROOT'
 ---> Running in de6fef00ad5e
/root/go
Removing intermediate container de6fef00ad5e
 ---> 4c43192410df
Successfully built 4c43192410df
Successfully tagged test:latest

Actual behavior

# docker build --no-cache -t test .
Sending build context to Docker daemon  2.048kB
Step 1/2 : FROM ubuntu
 ---> 735f80812f90
Step 2/2 : RUN echo 'export GOROOT=/root/go' >> /root/.bashrc &&     /bin/bash -c 'source /root/.bashrc && echo $GOROOT'
 ---> Running in 5a4e9c4fb915

Removing intermediate container 5a4e9c4fb915
 ---> 3e9d88bcc1b1
Successfully built 3e9d88bcc1b1
Successfully tagged test:latest

Steps to reproduce the behavior

Output of docker version:

# docker version
Client:
 Version:           18.06.0-ce
 API version:       1.38
 Go version:        go1.10.3
 Git commit:        0ffa825
 Built:             Wed Jul 18 19:11:02 2018
 OS/Arch:           linux/amd64
 Experimental:      false

Server:
 Engine:
  Version:          18.06.0-ce
  API version:      1.38 (minimum version 1.12)
  Go version:       go1.10.3
  Git commit:       0ffa825
  Built:            Wed Jul 18 19:09:05 2018
  OS/Arch:          linux/amd64
  Experimental:     false

Output of docker info:

# docker version
Client:
 Version:           18.06.0-ce
 API version:       1.38
 Go version:        go1.10.3
 Git commit:        0ffa825
 Built:             Wed Jul 18 19:11:02 2018
 OS/Arch:           linux/amd64
 Experimental:      false

Server:
 Engine:
  Version:          18.06.0-ce
  API version:      1.38 (minimum version 1.12)
  Go version:       go1.10.3
  Git commit:       0ffa825
  Built:            Wed Jul 18 19:09:05 2018
  OS/Arch:          linux/amd64
  Experimental:     false
root@iZj6ccusv1f4owdo0s9szyZ:~/nes/3# docker info
Containers: 39
 Running: 2
 Paused: 0
 Stopped: 37
Images: 89
Server Version: 18.06.0-ce
Storage Driver: overlay2
 Backing Filesystem: extfs
 Supports d_type: true
 Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
 Volume: local
 Network: bridge host macvlan null overlay
 Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: d64c661f1d51c48782c9cec8fda7604785f93587
runc version: 69663f0bd4b60df09991c08812a60108003fa340
init version: fec3683
Security Options:
 apparmor
 seccomp
  Profile: default
Kernel Version: 4.15.0-24-lowlatency
Operating System: Ubuntu 16.04.5 LTS
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 7.789GiB
Name: iZj6ccusv1f4owdo0s9szyZ
ID: 4N46:JD4L:GRWZ:SFHH:3JJS:AJ4G:SX3D:E7QE:QVWF:5P7L:JFOC:RJFL
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Username: zjb0807
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
 127.0.0.0/8
Live Restore Enabled: false

WARNING: No swap limit support

Additional environment details (AWS, VirtualBox, physical, etc.)
Aliyun ECS(Elastic Compute Service) , just like AWS

[seemethere]

Do you need to define GOROOT through your .bashrc?

Wouldn't it be better to define it as an ENV directive?

FROM ubuntu
ENV GOROOT /root/go
RUN echo ${GOROOT}

[zjb0807]

I know this,I just want to know why the /root/.bashrc file doesn't work, but the /root/bashrc file does

[seemethere]

The problem still exists even in a basic VM:

vagrant@ubuntu-bionic:~$ echo 'export GOROOT=$HOME/go' >> $HOME/.bashrc &&     /bin/bash -c 'source $HOME/.bashrc && echo $GOROOT'

This doesn't appear to be an issue with docker so I'm going to close this but I am curious as to why it doesn't work.

[46319943]

Maybe It's because you are not running interactively when use /bin/bash -c 'source xxx'.
In the first few line of .bashrc, it writes

# If not running interactively, don't do anything
[ -z "$PS1" ] && return

So, when use /bin/bash -c 'source xxx', it return immediately.