如何在 bash 中的定界符之后使用控制运算符

Question

我正在编写一个 bash 脚本来自动创建 MySQL 数据库。bash 脚本如下（请忽略那些变量 $db_name、$db_pwd...）：

#!/bin/bash
sudo mysql -u root << EOF
    CREATE DATABASE $db_name;
    CREATE USER $db_user IDENTIFIED BY $db_pwd;
    GRANT ALL PRIVILEGES ON $db_name.* TO $db_user;
    quit
EOF
printf "Done"

我希望数据库创建成功完成，然后运行打印命令。但我不能将 && 放在 EOF 之后，例如：

#!/bin/bash
sudo mysql -u root << EOF
    CREATE DATABASE $db_name;
    CREATE USER $db_user IDENTIFIED BY $db_pwd;
    GRANT ALL PRIVILEGES ON $db_name.* TO $db_user;
    quit
EOF &&
printf "Done"

它会显示如下错误：

invalid command name "EOF"
    while executing
"EOF &&"

我该怎么做？

Answer 1

一个简单的解决方法是如果 mysql 失败则退出。

sudo mysql -u root << EOF || exit
    CREATE DATABASE $db_name;
    CREATE USER $db_user IDENTIFIED BY $db_pwd;
    GRANT ALL PRIVILEGES ON $db_name.* TO $db_user;
EOF
echo "Done"

或者您可以添加set -e以使任何失败的命令立即退出脚本。

#!/bin/bash
set -e

sudo mysql -u root << EOF
    CREATE DATABASE $db_name;
    CREATE USER $db_user IDENTIFIED BY $db_pwd;
    GRANT ALL PRIVILEGES ON $db_name.* TO $db_user;
EOF
echo "Done"