带单引号的 jq bash 脚本

Question

我尝试使用 bash 来运行以下脚本：

#!/bin/bash

myvar="data1"
data='[
  {
    "resource_name": "data1.something",
    "resource_type": "Topic"
  },
  {
    "resource_name": "data2.something",
    "resource_type": "Topic"
  }
]'
query=$(echo ".[] | select((.resource_type==\"Topic\") and (.resource_name | startswith(\"${myvar}\") | not))")
echo ${data} | jq ${query}

它不起作用，因为行：

echo ${data} | jq ${query}

但是如果我运行在 zsh 中使用相同的脚本，它就可以工作。并给我以下错误：

jq: error: Could not open file |: No such file or directory

jq: error: Could not open file select((.resource_type=="Topic"): No such file or directory
jq: error: Could not open file and: No such file or directory
jq: error: Could not open file (.resource_name: No such file or directory
jq: error: Could not open file |: No such file or directory
jq: error: Could not open file startswith("data1"): No such file or directory
jq: error: Could not open file |: No such file or directory
jq: error: Could not open file not)): No such file or directory

我无法理解这里到底是什么问题，我只能认为在与 bash.

一起使用时我需要以某种方式添加单引号

例如，如果我使用单引号：

echo ${data} | jq \'${query}\'

报错：

jq: error: syntax error, unexpected INVALID_CHARACTER, expecting $end (Unix shell quoting issues?) at <top-level>, line 1:

'.[] jq: 1 编译错误

Answer 1

使用 --arg 选项将内容作为变量导入优于将 shell 变量注入实际过滤器代码。这也使您免于处理单引号或双引号。

#!/bin/bash

myvar="data1"
data='[
  {
    "resource_name": "data1.something",
    "resource_type": "Topic"
  },
  {
    "resource_name": "data2.something",
    "resource_type": "Topic"
  }
]'
query='.[] | select((.resource_type==$type) and (.resource_name | startswith($var) | not))'
echo "${data}" | jq --arg type "Topic" --arg var "${myvar}" "${query}"

{
  "resource_name": "data2.something",
  "resource_type": "Topic"
}

Demo

带单引号的 jq bash 脚本

jq with single quotes bash script

linux

bash

shell

jq