git-lab-user

#!/bin/bash
#
# Prints the GitLab user.
# Finds the value from the following sources in descending order:
# 1. environment ($GITLAB_USER)
# 2. git config --get lab.user
# 3. glab config get user
# If a value is not found, one is saved to the local .gitconfig.

DEBUG=0
PROMPT=1
ARGS_HOST=

# Parse arguments
while (( $# > 0 )); do
    if [[ "$1" == "-d" || "$1" == "--debug" ]]; then
        DEBUG=1
    elif [[ "$1" == "--no-input" ]]; then
        PROMPT=0
    elif [[ -n "$1" ]]; then
        ARGS_HOST="$1"
    fi
    shift
done

# Check environment variable
if [ -n "$GITLAB_USER" ]; then
  if (( $DEBUG )); then
      >&2 echo "Using gitlab user \"$GITLAB_USER\" from: \$GITLAB_USER"
  fi
  echo "$GITLAB_USER"
  exit
elif (( $DEBUG )); then
    >&2 echo "No gitlab user found in: \$GITLAB_USER"
fi

# Check git config
git_config_value=$(git config --get lab.user)
if [ -n "$git_config_value" ]; then
    if (( $DEBUG )); then
        >&2 echo "Using gitlab user \"$git_config_value\" from: git config --get lab.user"
    fi
    echo "$git_config_value"
    exit
elif (( $DEBUG )); then
    >&2 echo "No gitlab user found in: git config --get lab.user"
fi

# Check glab config
if which glab &> /dev/null; then
    # Get host from environment.
    if [[ -n "$ARGS_HOST" ]]; then
        glab_host="$ARGS_HOST"
        if (( $DEBUG )); then
            >&2 echo "    glab: using host \"$glab_host\" from command line argument"
        fi
    elif [[ -n "$GLAB_HOST" ]]; then
        glab_host="$GLAB_HOST"
        if (( $DEBUG )); then
            >&2 echo "    glab: using host \"$glab_host\" from: \$GLAB_HOST"
        fi
    elif [[ -n "$GITLAB_HOST" ]]; then
        glab_host="$GITLAB_HOST"
        if (( $DEBUG )); then
            >&2 echo "    glab: using host \"$glab_host\" from: \$GITLAB_HOST"
        fi
    else
        glab_host="$(glab config get host)"
        if [[ -n "$glab_host" ]]; then
            if (( $DEBUG )); then
                >&2 echo "    glab: using host \"$glab_host\" from: glab config get host"
            fi
        else
            glab_host="gitlab.com"
            if (( $DEBUG )); then
                >&2 echo "    glab: using default host \"$glab_host\""
            fi
        fi
    fi
    glab_config_value=$(glab config get user --host "$glab_host" 2> /dev/null)
    if [ -n "$glab_config_value" ]; then
        if (( $DEBUG )); then
            >&2 echo "Using gitlab user \"$glab_config_value\" from: glab config get user --host $glab_host"
        fi
        echo "$glab_config_value"
        exit
    fi
else
    if (( $DEBUG )); then
        >&2 echo "    glab: skipping, could not find \"glab\" command"
    fi
fi
fi
if (( $DEBUG )); then
    >&2 echo "No gitlab user found in: glab config get user"
fi

if (( $PROMPT )); then
    # Prompt for user
    >&2 echo -n "gitlab user: "
    read -r gitlab_user
    if [ -z "$gitlab_user" ]; then
        >&2 echo "Error: gitlab user is required"
        exit 1
    fi
    >&2 echo "Using gitlab user: $gitlab_user"
    echo "$gitlab_user"

    >&2 echo
    >&2 echo "Saving gitlab user locally for this repo..."
    >&2 echo "> git config lab.user $gitlab_user"
    git config lab.user "$gitlab_user"
    >&2 echo "Done."
    >&2 echo "If you want to set the gitlab user globally, run the following:"
    >&2 echo "    git config --global lab.user $gitlab_user"
    >&2 echo
fi