导出从单个 jq 调用中提取的多个环境变量

Question

当我使用

<some commands that output a json> | jq -r '.Credentials | .AccessKeyId, .SecretKey, .SessionToken'

我得到以下输出：

ABCDEF
123456
AAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBB

具有不同键的三条不同的线。

我想将这些输出导出为导出：

export AWS_ACCESS_KEY_ID=<the first line of the output>
export AWS_SECRET_KEY=<the second line of the output>
export AWS_SESSION_TOKEN=<the third line of the output>

我该如何做到这一点（并且仍然使用 oneliner）？

我尝试执行以下操作：

<some commands that output a json> | jq -r '.Credentials | .AccessKeyId, .SecretKey, .SessionToken' | export AWS_ACCESS_KEY_ID=`awk 'NR==1'`

它有效但是

<some commands that output a json> | jq -r '.Credentials | .AccessKeyId, .SecretKey, .SessionToken' | export AWS_ACCESS_KEY_ID=`awk 'NR==1'; export AWS_SECRET_KEY=`awk 'NR==2'`

挂起。

我正在使用 zsh。

Answer 1

正如 Charles Duffy 所建议的，您可以使用如下内容：

{ read -r AWS_ACCESS_KEY_ID && read -r AWS_SECRET_KEY && read -r AWS_SESSION_TOKEN; } << EOF
$(<some commands that output a json> | jq -r '.Credentials | .AccessKeyId, .SecretKey, .SessionToken')
EOF
export AWS_ACCESS_KEY_ID AWS_SECRET_KEY AWS_SESSION_TOKEN

另外，根据 Charles 的建议，您可以使用here string，如下所示：

{ read -r AWS_ACCESS_KEY_ID && read -r AWS_SECRET_KEY && read -r AWS_SESSION_TOKEN; } <<<"$(some commands that output a json | jq -r '.Credentials | .AccessKeyId, .SecretKey, .SessionToken')"
export AWS_ACCESS_KEY_ID AWS_SECRET_KEY AWS_SESSION_TOKEN

这是一个概念证明：

$ unset a b c

$ { read -r a && read -r b && read -r c; }<< EOF
$(cat t.txt)
EOF

$ echo $a $b $c
ABCDEF 123456 AAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBB

$ unset a b c

$ { read -r a && read -r b && read -r c; }<<<"$(cat t.txt)"

$ echo $a $b $c
ABCDEF 123456 AAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBBAAAAAABBBBB