.bash_profile (macOS)

# bash completion
export BASH_COMPLETION_COMPAT_DIR="/usr/local/etc/bash_completion.d"
[[ -r "/usr/local/etc/profile.d/bash_completion.sh" ]] && . "/usr/local/etc/profile.d/bash_completion.sh"


# nvm
export NVM_DIR="$HOME/.nvm"
[ -s "/usr/local/opt/nvm/nvm.sh" ] && . "/usr/local/opt/nvm/nvm.sh"
[ -s "/usr/local/opt/nvm/etc/bash_completion" ] && . "/usr/local/opt/nvm/etc/bash_completion"


# git
export GIT_PS1_SHOWDIRTYSTATE=1
export GIT_PS1_SHOWUNTRACKEDFILES=1
alias git='LANG=en_US.UTF-8 git'


# gcloud
source '/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/path.bash.inc'
source '/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/completion.bash.inc'
source <(kubectl completion bash)


# custom prompt
function __prompt_command {
  local EXIT="$?"
  PS1=""

  local Reset='\[$(tput sgr0)\]'
  local Gray1='\[$(tput setaf 248)\]'
  local Gray2='\[$(tput setaf 238)\]'
  local Green='\[$(tput setaf 40)\]'
  local Red='\[$(tput setaf 196)\]'

  local Status="${Green}"
  if [ $EXIT != 0 ]; then
    Status="${Red}"
  fi

  PS1+="\n${Status}= ${Gray1}\u${Gray2}@${Gray1}\h \w${Reset}"
  PS1+=" `__git_ps1 "${Gray2}(${Gray1}%s${Gray2})${Reset}"`"
  PS1+="\n${Gray2}\$ ${Reset}"
}

PROMPT_COMMAND=__prompt_command

.bashrc (Windows)

# git
export GIT_PS1_SHOWDIRTYSTATE=1
export GIT_PS1_SHOWUNTRACKEDFILES=1
alias git='LANG=en_US.UTF-8 git'


# custom prompt
function __prompt_command {
  local EXIT="$?"
  PS1=""

  local Reset="\033[m"
  local Gray1="${Reset}\033[1;30m"
  local Gray2="${Reset}\033[37m"
  local Green="${Reset}\033[32m"
  local   Red="${Reset}\033[31m"

  local Status="${Green}"
  if [ $EXIT != 0 ]; then
    Status="${Red}"
  fi

  PS1+="\n${Status}= ${Gray1}\u${Gray2}@${Gray1}\h \w${Reset}"
  PS1+=" `__git_ps1 "${Gray2}(${Gray1}${Reset}%s${Gray2})${Reset}"`"
  PS1+="\n${Gray2}$ ${Reset}"
}

PROMPT_COMMAND=__prompt_command

Microsoft.PowerShell_profile.ps1

Function Prompt {
    $__lastOK = $?
    $__lastCode = $Global:LASTEXITCODE

    Write-Host ""

    if ($__lastCode -eq 0) {
        Write-Host "= " -NoNewline -ForegroundColor Green
    } elseif ($__lastOK -eq $false) {
        Write-Host "= " -NoNewline -ForegroundColor Red
    } else {
        Write-Host "= " -NoNewline -ForegroundColor Gray
    }

    Write-Host "$($Env:USERNAME)" -NoNewline -ForegroundColor DarkGray
    Write-Host "@" -NoNewline -ForegroundColor Gray
    Write-Host "$($Env:COMPUTERNAME.ToLowerInvariant())" -NoNewline -ForegroundColor DarkGray
    Write-Host " $(Get-Location)" -ForegroundColor DarkGray
    Write-Host "$('>' * ($NestedPromptLevel + 1))" -NoNewline -ForegroundColor Gray

    $Global:LASTEXITCODE = $__lastCode

    return " "
}