Scriptably log into a private verdaccio npm registry

npm_login.sh

#!/bin/sh

usage() {
    echo ""
    echo "Log into a private verdaccio npm registry"
    echo ""
    echo "  Usage: npm_login.sh [OPTIONS] [REQUIRED]"
    echo ""
    echo "REQUIRED"
    echo "     --username       : Your username"
    echo "     --registry       : The registry url, e.g. 'https://example.com' (notice no trailing space)"
    echo ""
    echo "OPTIONS"
    echo "  -h,--help           : Display this menu"
    echo "  -v,--version        : Display the version of this script"
    echo "     --password       : Your password"
    echo "     --password-stdin : Pass in your password as stdin"
    echo "     --scope          : The scope of your registry, e.g. '@myorg'"
}

VERSION="1.0.0"


_username=""
registry=""
password=""
password_stdin=""
scope=""

while [ "$#" -gt 0 ]; do
    case "$1" in
        --username)
            shift
            if [ -z "$1" ]; then
                echo "Bad username" >&2
                exit 1
            fi
            _username="$1"
            ;;
        --registry)
            shift
            if [ -z "$1" ]; then
                echo "Bad registry" >&2
                exit 1
            fi
            registry="$1"
            ;;
        --scope)
            shift
            if [ -z "$1" ]; then
                echo "Bad scope" >&2
                exit 1
            fi
            scope="$1"
            ;;
        --password)
            shift
            if [ -z "$1" ]; then
                echo "Bad password" >&2
                exit 1
            fi
            password="$1"
            ;;
        --password-stdin)
            password_stdin="true"
            ;;

        -v|--version)
            echo "npm_login: v$VERSION"
            exit 0
            ;;
        -h|--help)
            usage
            exit 0
            ;;
        *)
            echo "Unrecognized argument '$1'" >&2
            exit 1
            ;;
    esac
    shift
done

if [ -z "$_username" ]; then
    echo "Missing required parameter --username" >&2
    exit 1
fi
if [ -z "$registry" ]; then
    echo "Missing required parameter --registry" >&2
    exit 1
fi
cleaned_registry="${registry%/}/"


if [ ! -z "$password_stdin" ]; then
    password="$(cat -)"
elif [ -z "$password" ]; then
    cleanup() {
        stty echo
        exit 1
    }
    trap cleanup INT TERM
    printf "Password: "
    stty -echo
    read password
    stty echo
    printf "\n"
fi

if [ -z "$password" ]; then
    echo "Missing password" >&2
    exit 1
fi

# many thanks to: https://gist.github.com/jastisriradheshyam/296707910bbcf4eda96752b449fd040f
BODY=$(curl -s \
  -X PUT \
  -u $_username:$password \
  -H "Content-Type:application/json" \
  -d "{\"name\": \"$_username\", \"password\": \"$password\"}" \
  "${cleaned_registry}-/user/org.couchdb.user:${_username}/-rev/undefined"  2>&1)

TOKEN=$(echo "$BODY" | grep -Po '(?<="token": ")[^"]*')

if [ -z "$TOKEN" ]; then
    echo "Failed to login" >&2
    echo "$BODY" >&2
    exit 2
fi

domain="${cleaned_registry#http://}"
domain="${domain#https://}"
domain="${domain%/}"
npm config set "//$domain/:_authToken=$TOKEN"

if [ -z "$scope" ]; then
    npm config set "registry=${cleaned_registry}"
    echo "You are new authenticated as '$_username' on $cleaned_registry"
else
    npm config set "${scope}:registry=${cleaned_registry}"
    echo "You are new authenticated as '$_username' on $cleaned_registry under $scope"
fi