Version not set in Docker container?

[luckman212]

Hi, and 🙏 thank you for transfer.sh !

I am running it in Docker, and wanted to make a simple update notifier when new releases are tagged. So I wanted a way to return the current running version from a script.

Looking at the source, it seems that there is a version cli argument that should output the running version

https://github.com/dutchcoders/transfer.sh/blob/29d93c6da065f6fdf73654c682ae3cc656c70e6b/cmd/cmd.go#L317

but when I tried it, it's empty:

# docker pull dutchcoders/transfer.sh:latest
latest: Pulling from dutchcoders/transfer.sh
Digest: sha256:ebeded1b0ba4e23fb41b58c762b5e885559d625aa5ea48f70a9adc3170ed8c17
Status: Image is up to date for dutchcoders/transfer.sh:latest
docker.io/dutchcoders/transfer.sh:latest

# docker exec -it transfersh /go/bin/transfersh version
transfer.sh : Easy file sharing from the command line

Am I doing something wrong? Is there another way to retrieve the current version?

[paolafrancesca]

hello @luckman212 , thanks for reporting this bug

the problem is that the build command on docker file does not work properly, with git describe --tags failing since it's run not inside a git repo

[luckman212]

Is there any workaround you could suggest? What about just hardcoding the current version in a VERSION file and having the Dockerfile read from that?

[stefanbenten]

You can use watchtower to achieve the same without having to write a script :)

[luckman212]

Ok I'll look into that, thanks

[amayer5125]

I believe the issue is that ".git" is in .dockerignore. When COPY . . is run, the files in .dockerignore are skipped. Since the .git directory isn't copied into the docker image the command that sets the version (git describe --tags) fails. Removing ".git" from .dockerignore fixes the issue for me.

$ docker run --rm transfer.sh version 
transfer.sh v1.6.1-1-gd4f1b84: Easy file sharing from the command line

I don't believe removing .git from the .dockerignore file is the correct solution for the repo though because then the container will be larger.

[paolafrancesca]

I don't believe removing .git from the .dockerignore file is the correct solution for the repo though because then the container will be larger.

the final image is based on scratch, we can remove .git from the .dockerignore without having a bigger image. the .git folder will be copied only in the build stage of the image