I'm currently using Windows 11 and I try to construct a docker file for my development environment, which can be seen below. For me, the line RUN --mount=type=bind,target=/home/$username/src is interesting. I understand "build context" as the folder in which the Dockerfile lies. From the docs:
RUN --mountallows you to create mounts that process running as part of the build can access. This can be used to bind files from other part of the build without copying [...] or creating cache locations to speed up your build.
RUN --mount=type=bind[...] allows binding directories (read-only) in the context or in an image to the build container.
So at best I would like to have something like a bind mount via a command like this: docker run -dit --mount type=bind,source="${PWD}\target",target=/home/foo/src (from PowerShell) or docker run -dit --mount type=bind,source="%cd%\target",target=/home/foo/src (from cmd) ... for some reason $username didn't work in ,target=/home/foo/src - but I somehow need to get this inside the Dockerfile:
FROM ubuntu:20.04ENV RUBY_VERSION 2.6.6ENV NODE_VERSION 8.2.1ARG username=fooENV RVM_DIR "/home/$username/.rvm"ENV NVM_DIR "/home/$username/.nvm"RUN apt-get update && apt-get -y dist-upgrade && apt-cache policy libssl1.0-dev#libssl1.0-dev:# Installed: (none)# Candidate: (none)# Version table:RUN apt-get update && apt-get install -y curl build-essential whois unzip sudo libpq-dev passwd git wgetRUN echo "$username ALL=(ALL) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/$username## create user for Heizkosten-PlattformRUN adduser --gecos "" --disabled-password --shell /bin/bash $username## continue as non-root userUSER $username## create application directory (as non-root user)RUN sudo mkdir /opt/$username && sudo chown $username:$username /opt/$username# 0. GitWORKDIR /opt/$usernameRUN git config --global url."https://".insteadOf git:// RUN git init RUN git config --global user.name "John Doe"RUN git config --global user.email "johndoe@example.com" # 1. Preparations for RVMRUN sudo sh -c 'echo "deb http://security.ubuntu.com/ubuntu bionic-security main" >> /etc/apt/sources.list'RUN sudo apt update && apt-cache policy libssl1.0-devRUN sudo apt-get install libssl1.0-dev -yRUN sudo apt-get install libpq-dev -y# 2.a RVM (Ruby Version Manager)RUN curl -sSL https://rvm.io/pkuczynski.asc | gpg --import -RUN \curl -sSL https://get.rvm.io | bash# \curl -sSL https://get.rvm.io | bash -s stable --railsRUN . $RVM_DIR/scripts/rvm # Doen't seem to do much. source instead of . doesn't work.RUN $RVM_DIR/bin/rvm install $RUBY_VERSIONRUN $RVM_DIR/bin/rvm use default $RUBY_VERSION# 3 NVM (Node Version Manager)RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.2/install.sh | bashRUN . "$NVM_DIR/nvm.sh" && nvm install $NODE_VERSION && nvm use $NODE_VERSIONENV NODE_PATH $NVM_DIR/versions/node/v$NODE_VERSION/lib/node_modulesENV PATH $NVM_DIR/versions/node/v$NODE_VERSION/bin:$PATHRUN npm install # 2.b # Add RVM to PATH for scripting. Make sure this is the last PATH variable change.ENV PATH $PATH:$RVM_DIR/rubies/ruby-$RUBY_VERSION/binENV PATH $PATH:$RVM_DIR/bin#MOUNTRUN mkdir ~/srcRUN --mount=type=bind,target=/home/$username/src # ,from Build stage or image name for the root of the source. Defaults to the build context.WORKDIR /home/$username/srcrun pwd && ls -la /home/foo/src && exit 1RUN bundle install# make port of rails server availableEXPOSE 3000run pwd && ls -la /home/foo/src && exit 1 is just to verify that the src dir is still empty:
------> [28/29] RUN pwd && ls -la /home/foo/src && exit 1:#32 0.449 /home/foo/src#32 0.451 total 8#32 0.451 drwxr-xr-x 2 foo foo 4096 Oct 17 13:04 .#32 0.451 drwxr-xr-x 1 foo foo 4096 Oct 17 13:04 ..------executor failed running [/bin/sh -c pwd && ls -la /home/foo/src && exit 1]: exit code: 1(I use && exit 1 to jump out and let docker keep the output)