Docker run指定-w工作目录后，Dockerfile复制的脚本消失问题咨询

Let me break down exactly what's going on here:

The Root Cause #

When you used COPY . ~/sourceshell.sh in your Dockerfile, the ~ resolves to the root user's home directory (/root/) during the build process. That means your file was copied to /root/sourceshell.sh, not into the working directory you later specify with the -w flag.

When you run the container with -w "/root/afolder/", Docker starts your interactive shell session in /root/afolder/ instead of the default (which is /root/ for the ros:kinetic base image). Since sourceshell.sh lives one level up in /root/, it won't show up in your current working directory by default.

Simple Fixes to Try #

Here are a few straightforward ways to resolve this:

1. Update Your Dockerfile to Target the Desired Directory
   If you want sourceshell.sh to always live in /root/afolder/, set the working directory in your Dockerfile first so the COPY command uses that path automatically:

   FROM ros:kinetic
   WORKDIR /root/afolder/
   COPY . ./sourceshell.sh
   RUN ["/bin/bash","-c","source /opt/ros/kinetic/setup.bash"]
   

   Now when you build and run the container (with or without -w), the file will be waiting for you in /root/afolder/.

2. Access the File via Its Absolute Path
   If you don't want to rebuild the image, just reference the file using its full path when you're in /root/afolder/:

   /root/sourceshell.sh
   

   Or switch to the /root directory first to run it with a relative path:

   cd /root && ./sourceshell.sh
   

3. Launch the Shell in Your Target Directory (No Image Changes Needed)
   You can adjust your docker run command to start in /root/afolder/ while still keeping easy access to the file:

   docker run --rm -it test /bin/bash -c "cd /root/afolder/ && exec /bin/bash"
   

   This starts your shell in the desired directory, and you can still use the absolute path to run sourceshell.sh whenever you need it.

Quick Side Note #

One small thing to mention: The RUN ["source /opt/ros/kinetic/setup.bash"] command in your Dockerfile doesn't persist ROS environment variables for your interactive shell. If you want those variables available every time you log into the container, add source /opt/ros/kinetic/setup.bash to /root/.bashrc in your Dockerfile, or use ENV commands to set the necessary variables directly.

内容的提问来源于stack exchange，提问作者KansaiRobot