如何在bash中循环jq唯一数组? [英] How to loop over jq unique array in bash?

问题描述

我试图遍历唯一的名称并提交来自github json对象的消息.但是，当数组中有空格时，bash会将其视为单独的数组项

I'm trying to loop over unique names and commit messages from a github json object. However when there are spaces in the arrays bash will treat them as individual array items

#!/usr/bin/env bash

commits='[
  {
    "author": {
      "email": "[e-mail]",
      "name": "Chris",
      "username": "chris"
    },
    "committer": {
      "email": "[e-mail]",
      "name": "Chris",
      "username": "chris"
    },
    "message": "commit message 1"
  },
  {
    "author": {
      "email": "[e-mail]",
      "name": "John",
      "username": "jdoe"
    },
    "committer": {
      "email": "[e-mail]",
      "name": "John",
      "username": "jdoe"
    },
    "message": "commit message 2"
  },
    {
    "author": {
      "email": "[e-mail]",
      "name": "John",
      "username": "jdoe"
    },
    "committer": {
      "email": "[e-mail]",
      "name": "John",
      "username": "jdoe"
    },
    "message": "commit message 3"
  }
]'

authors=$( jq -rc '[.[].author.name] | unique | @sh' <<<"${commits}" )
echo "authors: $authors"

# this works
for author in $authors
do
  echo "author: $author"
done

echo "------------"

# this does not
messages=$( jq -rc '[.[].message] | unique | @sh' <<<"${commits}" )
echo "messages: $messages"

for message in $messages
do
  echo "message: $message"
done

哪个输出

authors: 'Chris' 'John'
author: 'Chris'
author: 'John'
------------
messages: 'commit message 1' 'commit message 2' 'commit message 3'
message: 'commit
message: message
message: 1'
message: 'commit
message: message
message: 2'
message: 'commit
message: message
message: 3'

我希望:

authors: 'Chris' 'John'
author: 'Chris'
author: 'John'
------------
messages: 'commit message 1' 'commit message 2' 'commit message 3'
message: 'commit message 1'
message: 'commit message 2'
message: 'commit message 3'

推荐答案

将''更改为'_'并返回

Works with change ' ' to '_' and back

messages=$( jq -rc '[.[].message] | unique | @sh' <<<"${commits}" )
messages="${messages// /_}"
messages=(${messages//"'_'"/"' '"})
echo "messages: ${messages[@]//_/ }"
for message in "${messages[@]//_/ }"
do
  echo " message: $message"
done

或者像这样

IFS=$'\n' messages=( $(jq -rc '.[].message' <<<"${commits}") )
printf   "messages: "; printf "'%s' " "${messages[@]}"; echo
printf   " message: '%s' \n"          "${messages[@]}"

我们可以做类似的事情

     IFS=$'\n'
 authors=($(jq -rc '.[].author.name' <<<"${commits}"))
messages=($(jq -rc '.[].message'     <<<"${commits}"))
printf " authors | "; printf "'%s' " "${authors[@]}" ; echo
printf "  author | '%s' \n"          "${authors[@]}"
echo   "---------+---------"
printf "messages | "; printf "'%s' " "${messages[@]}"; echo
printf " message | '%s' \n"          "${messages[@]}"

要这样输出

 authors | 'Chris' 'John' 'John' 
  author | 'Chris' 
  author | 'John' 
  author | 'John' 
---------+---------
messages | 'commit message 1' 'commit message 2' 'commit message 3' 
 message | 'commit message 1' 
 message | 'commit message 2' 
 message | 'commit message 3' 

这篇关于如何在bash中循环jq唯一数组?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！