CODEWITHSUNDEEP
dockerdockerhub
Bruno Bronosky
Bruno Bronosky

Reputation: 70459

Is there a way to get the Docker Hub username of the current user?

I see that ~/.dockercfg has your login credentials, but it is your email and not your username. I see that running docker login displays your username and prompts you to change it. But, you can you just get your username to put into a build script?

Upvotes: 24

Views: 69277

Answers (4)

Vinod Chaudhari
Vinod Chaudhari

Reputation: 7

If you want to see which user is executing Docker client commands on the host, you can use:

command whoami

Upvotes: -2

Bruno Bronosky
Bruno Bronosky

Reputation: 70459

Update for modern Docker.

Seems that docker info no longer contains username. I have instead learned to extract it from the credential store via jq. I haven't tried this on every credStore, but for the ones I have checked on macOS and Linux, this works.

# line breaks added for readability; this also works as a oneliner
docker-credential-$(
  jq -r .credsStore ~/.docker/config.json
) list | jq -r '
  . |
    to_entries[] |
    select(
      .key | 
      contains("docker.io")
    ) |
    last(.value)
'

[bonus] Show the entire contents of your credential helper

In this case I've settled on docker-credential-desktop, but it should work with any. You can extract your credential helper from your Docker config as I did in the previous code block.

docker-credential-desktop list | \
    jq -r 'to_entries[].key'   | \
    while read; do
        docker-credential-desktop get <<<"$REPLY";
    done

Upvotes: 24

Kevin Cantwell
Kevin Cantwell

Reputation: 1170

Display the username with:

docker info | sed '/Username:/!d;s/.* //'

Store it in a variable with:

username=$(docker info | sed '/Username:/!d;s/.* //'); 
echo $username

Note that if you have bash history expansion (set +H) you will be unable to put double quotes around the command substitution (e.g. "$(cmd...)" because ! gets replaced with your last command. Escaping is very tricky with these nested expansions and using it unquoted as shown above is more readable and works.

Upvotes: 20

Bruno Bronosky
Bruno Bronosky

Reputation: 70459

This works to extract it, but technically it's a race condition.

username="$(sed 's/.*(//;s/).*//' <(docker login & sleep 1; kill %1))"

Surely there is something better.

Upvotes: 0

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