git-credential-bw.sh

#!/usr/bin/env bash

# bw git-credential helper
# Based on https://github.com/lastpass/lastpass-cli/blob/master/contrib/examples/git-credential-lastpass

# A credential helper for git to retrieve usernames and passwords from bw.
# For general usage, see https://git-scm.com/docs/gitcredentials.
# Here's a quick version:
# 1. Put this somewhere in your path.
# 2. git config --global credential.helper bw

declare -A params

if [ "x$1" == "xget" ]; then
    read line
    while [ -n "$line" ]; do
        key=${line%%=*}
        value=${line#*=}
        params[$key]=$value
        read line
    done

    if [ "x${params['protocol']}" != "xhttps" ]; then
        exit
    fi

    if [ -z "${params["host"]}" ]; then
        exit
    fi

    bw list items > /dev/null 2>&1
    if [ $? -ne 0 ]; then
        echo "Please login to bw to use git credential helper" > /dev/stderr
        exit
    fi
    
    id=$(bw list items --search ${params["host"]}|jq ".[] | select(.name == \"${params[\"host\"]}\").id" -r)
    
    if [ "x$id" == "x" ]; then
        echo "Couldn't find id in bw DB." > /dev/stderr
        echo ${params}
        exit
    fi
    
    user=$(bw get username ${id})
    pass=$(bw get password ${id})

    if [ "x$user" == "x" ] || [ "x$pass" == "x" ]; then
        echo "Couldn't find host in bw DB." > /dev/stderr
        exit
    fi

    echo username=$user
    echo password=$pass
fi