windowsではssh-askpassが使えないのでsetxで環境変数に設定しちゃうぞバッチファイル

ssh-env.bat

@echo off
if "%1" == "-f" goto doit
if "%1" == "-s" goto session
if not "%SSH_AGENT_PID%" == "" goto end
goto doit

:session
for /f "eol=; tokens=1,2 delims==;" %%1 in ('ssh-agent.exe') do (
 if "%%1" == "SSH_AUTH_SOCK" setx SSH_AUTH_SOCK %%2 & set SSH_AUTH_SOCK=%%2
 if "%%1" == "SSH_AGENT_PID" setx SSH_AGENT_PID %%2 & set SSH_AGENT_PID=%%2
)
goto bottom

:doit
for /f "eol=; tokens=1,2 delims==;" %%1 in ('ssh-agent.exe') do (
 if "%%1" == "SSH_AUTH_SOCK" set SSH_AUTH_SOCK=%%2
 if "%%1" == "SSH_AGENT_PID" set SSH_AGENT_PID=%%2
)

:bottom
ssh-add
:end