Cloning a git repo in Dockerfile and working off it

You can do it by three ways.

Here is the Dockerfile.

FROM node:alpine RUN apk add --no-cache git RUN apk add --no-cache openssh WORKDIR /data RUN git clone https://github.com/jahio/hello-world-node-express.git /data/app WORKDIR /data/app EXPOSE 3000 

Build:

docker build -t node-test . 

Update:

Damn, I am crazy about docker :D Another solution easiest and good

Create an empty directory in host and container and mount that one

/home/adiii/Desktop/container_Data:/to_host 

Copy the cloned repo to to_host at the entry point with -u flat so only will new file will be paste and host data will be persistent.

and entrypoint.sh

#!/bin/ash cp -r -u /data/app /to_host && /bin/ash 

dockerfile update section.

ADD entrypoint.sh /usr/bin/entrypoint.sh RUN chmod +x /usr/bin/entrypoint.sh RUN WORKDIR / RUN mkdir -p to_host # so we will put the code in to_host after container bootup boom im crazy about docker so no need to make it complex..simple easy :D ENTRYPOINT [ "/usr/bin/entrypoint.sh" ] 

1: using docker volume

Create volume named code

docker volume create code 

Now run that container with mounting this volume.

docker run -p 3000:3000 -v myvol:/data/app --rm -it node-test ash 

Now terminate the container or stopping it will data still preserved in volume.

You can find if OS is Linux.

/var/lib/docker/volumes/code/_data 

you will see three

app.js node_modules package.json 

2: using bash see comments in the script

 #!/bin/bash image_name=node-test container_name=git_code # for first time use first_time if [ $1 == "first_time" ] ; then # remove if exist docker rm -f $container_name #run contianer for first time to copy code docker run --name $container_name -dit $image_name ash fi # check if running if docker inspect -f '{{.State.Running}}' $container_name ; then # copy code from container to /home/adiii/desktop docker cp $container_name:/data/app /home/adil/Desktop/app fi # for normal runing using run if [ $1 == "run" ]; then # remove old container if running docker rm -f $container_name docker run --name $container_name -v /home/adil/Desktop/app:/data/app -dit $image_name fi 

Now run the command in the container

docker exec -it git_code ash 

3: By mounting the empty directory of the host with code directory of the container at the runtime. So when you run next time with mount directory it will contain your update code which you made any change from host OS. But make sure the permission of that directory after container run and terminated data will be there but the behaviour of this method is not constant.

docker run -p 3000:3000 -v /home/adiii/code/app:/data/app --rm -it node-test ash 

Here /home/adiii/code/app is an empty directory of host and after termination of containers its still have cloned code but I said its behavior varies.