bash 将 JSON 导出到环境变量
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Exporting JSON to environment variables
提问by Qirohchan
If I have a JSON like this,
如果我有这样的 JSON，
{
"hello1": "world1",
"testk": "testv"
}
And I want to export each of these key-value pairs as environment variables, how to do it via shell script? So for example, when I write on the terminal, echo $hello1, world1should be printed and similarly for other key-value pairs?
Note: The above JSON is present in a variable called $valuesand not in a file.
我想将这些键值对中的每一个导出为环境变量，如何通过 shell 脚本来实现？例如，当我在终端上书写时，echo $hello1,world1应该被打印出来，对于其他键值对也是如此？注意：上面的 JSON 存在于一个被调用的变量中，$values而不是一个文件中。
I know it will be done via jqand written a shell script for this, but it doesn't work.
我知道这将通过jq并为此编写一个 shell 脚本来完成，但它不起作用。
for row in $(echo "${values}" | jq -r '.[]'); do
-jq() {
echo ${row} | jq -r
}
echo $(_jq '.samplekey')
done
Edit: Trying Turn's answer, I did this:
编辑：尝试转的答案，我这样做了：
values='{"hello1":"world1","hello1.world1.abc1":"hello2.world2.abc2","testk":"testv"}'
for s in $(echo $values | jq -r "to_entries|map(\"\(.key)=\(.value|tostring)\")|.[]" ); do
export $s
done
采纳答案by Turn
Borrowing from this answerwhich does all of the hard work of turning the JSON into key=value pairs, you could get these into the environment by looping over the jqoutput and exporting them:
借用这个答案，它完成了将 JSON 转换为键=值对的所有艰苦工作，您可以通过循环jq输出并将export它们放入环境中：
for s in $(echo $values | jq -r "to_entries|map(\"\(.key)=\(.value|tostring)\")|.[]" ); do
export $s
done
回答by sjsam
Using command substitution $():
使用命令替换$()：
# $(jq -r 'keys[] as $k | "export \($k)=\(.[$k])"' file.json)
# echo $testk
testv
Edit :Responding to thiscomment
编辑：回应此评论
You should do
你应该做
$( echo "$values" | jq -r 'keys[] as $k | "export \($k)=\(.[$k])"' )
Just mind the doublequotes around $values
请注意double周围的引号$values
Note:Couldn't confirm if there is security implication to this approach, that is if the user could manipulate the jsonto wreak havoc.
注意：无法确认这种方法是否存在安全隐患，即用户是否可以操纵json来造成严重破坏。
回答by Noam Manos
Another way, without using jq, is to parse the json with grep & sed:
另一种不使用jq 的方法是使用grep & sed解析json ：
for keyval in $(grep -E '": [^\{]' my.json | sed -e 's/: /=/' -e "s/\(\,\)$//"); do
echo "export $keyval"
eval export $keyval
done
Explanation:
解释：
- First, grep will filter all "key" : valuepairs (value can be "string", number, or boolean).
- Then, sed will replace
:with=, and remove trailing,. - Lastly, exporting the
"key"=valuewith eval
- 首先，grep 将过滤所有"key" : value对（值可以是 "string"、number或boolean）。
- 然后， sed 将替换
:为=，并删除尾随的,。 - 最后，
"key"=value用 eval导出
Here's an output example, exporting json keys, from an AWS record-set:
这是一个输出示例，从 AWS 记录集中导出 json 密钥：
export "Name"="\052.apps.nmanos-cluster-a.devcluster.openshift.com."
export "Type"="A"
export "HostedZoneId"="Z67SXBLZRQ7X7T"
export "DNSName"="a24070461d50270e-1391692.us-east-1.elb.amazonaws.com."
export "EvaluateTargetHealth"=false
导出“名称”="\052.apps.nmanos-cluster-a.devcluster.openshift.com。"
导出“类型”=“A”
导出“HostedZoneId”=“Z67SXBLZRQ7X7T”
导出“DNSName”="a24070461d50270e-1391692.us-east-1.elb.amazonaws.com。"
导出“EvaluateTargetHealth”=false
回答by peak
The approach illustrated by the following shell script avoids most (but not all) problems with special characters:
以下 shell 脚本说明的方法避免了大多数（但不是全部）特殊字符问题：
#!/bin/bash
function json2keyvalue {
cat<<EOF | jq -r 'to_entries|map("\(.key)\t\(.value|tostring)")[]'
{
"hello1": "world1",
"testk": "testv"
}
EOF
}
while IFS=$'\t' read -r key value
do
export "$key"="$value"
done < <(json2keyvalue)
echo hello1="$hello1"
echo testk="$testk"
Note that the above assumes that there are no tabs in the keys themselves.
请注意，以上假设键本身没有选项卡。
