easy-rsa v3：默默执行build-ca和gen-req？

使用更新的easy-rsa v3版本，我无法找到一种方法来静默地将数据提供给命令行：

$ ./easyrsa build-ca nopass

Note: using Easy-RSA configuration from: ./vars
Generating a 2048 bit RSA private key
...............................................................................................................................................................+++
...............................................................................+++
writing new private key to '~/EasyRSA-3.0.4/pki/private/ca.key.Dz9CBy9xV1'
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You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
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Common Name (eg: your user, host, or server name) [Easy-RSA CA]:

我试过摆弄文件openssl-easyrsa.cnf，vars但无济于事。

我在docker容器入口点内自动执行这些操作，这就是为什么我不能使用任何交互式的东西。

好的，这就像在运行easyrsa之前一样简单：

# export EASYRSA_BATCH=1