Podman login to all registries in pull secret

login-pull-secrets.sh

# if you don't want to just use --authfile or set REGISTRY_AUTH_FILE for whatever reason
# you may login to each registry in your pull secret thusly
# spoiler alert, here's how to extract usernames and passwords from your pull secret

PULL_SECRET_PATH=pull-secret.json

for R in $(jq -r '.auths|keys[]' $PULL_SECRET_PATH ); do
  echo "Logging into $R"
  U=$(jq -r ".auths.\"$R\".auth" $PULL_SECRET_PATH | base64 -d | awk -F: '{print $1}')
  P=$(jq -r ".auths.\"$R\".auth" $PULL_SECRET_PATH | base64 -d | awk -F: '{print $2}')
  podman login -u $U -p $P $R
done