shell脚本修改json中某个字段的值

Posted 2021-01-15 木子楼

shell脚本修改json中某个字段的值

• 思路：通过awk来找到旧数据，然后用sed来替换旧数据

源码

config.json

{
  "name": "the_name",
  "id": "132869",
  "content_url": "https://hot.example.com/",
  "enable_feature1": "true",
  "enable_feature2": "false"
}

config/mode1.sh

#!bin/bash
content_url_new="https://hot1.example.com/"
enable_feature1_new="true"
enable_feature2_new="true"

config/mode2.sh

#!bin/bash
content_url_new="https://hot2.example.com/"
enable_feature1_new="false"
enable_feature2_new="false"

main.sh

#!bin/bash

if [ "$1" != "mode1" -a "$1" != "mode2" ];then
    echo "tip:─┬─────── 您输入参数不对，请重试：" 
    echo "     │─────── \'mode1\', 使用config/mode1.sh的配置"
    echo "     └─────── \'mode2\', 使用config/mode2.sh的配置"
    exit 0
fi

case $1 in
mode1) 
    . config/mode1.sh
;;
mode2) 
    . config/mode2.sh
;;
*)
    echo "Usage: sh main.sh [mode1|mode2]"
    exit;
esac

# 如果要修改的内容在文档中唯一，可以做全局修改
content_url_old=$(awk -F"\\"" \'/content_url/{print $4}\' example.json)
sed -e "s@$content_url_old@$content_url_new@g" -i example.json


# 如果要修改的内容在文档中不唯一，就需要针对那一行做修改。（例如，这个例子中有两个布尔类型的值）
enable_feature1_line=$(awk -F"\\"" \'/enable_feature1/{print NR}\' example.json) # 记住行号
enable_feature1_old=$(awk -F"\\"" \'/enable_feature1/{print $4}\' example.json)  # 获取旧数据
sed -e "$enable_feature1_line s@$enable_feature1_old@$enable_feature1_new@" -i example.json # 替换所在行的老数据

enable_feature2_line=$(awk -F"\\"" \'/enable_feature2/{print NR}\' example.json) # 记住行号
enable_feature2_old=$(awk -F"\\"" \'/enable_feature2/{print $4}\' example.json)  # 获取旧数据
sed -e "$enable_feature2_line s@$enable_feature2_old@$enable_feature2_new@" -i example.json # 替换所在行的老数据

运行

sh main.sh mode1
sh main.sh mode2

其他方案

• shell中替换json中指定的值 - 矮子爬楼梯 - 博客园

  sed -i  \'s/\\("enable_feature1":"\\).*/\\1\'"$enable_feature1_to"\'",/g\'   example.json