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Shell逐行读取、解析并export变量实践

 2 years ago
source link: https://mryqu.github.io/post/shell%E9%80%90%E8%A1%8C%E8%AF%BB%E5%8F%96%E8%A7%A3%E6%9E%90%E5%B9%B6export%E5%8F%98%E9%87%8F%E5%AE%9E%E8%B7%B5/
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Shell逐行读取、解析并export变量实践 - Mryqu's Notes

setenv.yaml示例

MY_HOME: /local/install/myhome
MY_JAVA_HOME: $MY_HOME/jre/bin

test.ksh示例

#!/bin/ksh

getCustEnv() {
  # 除了while read 也可以使用for var，但是需要更改IFS为换行符
  cat setenv.yaml | while read line; do
    line=$(echo $line | grep -v "^\s*#" | grep ":")
    if [ ! -z $line ]; then
      key=$(echo $line | cut -d: -f1 | sed -e 's/^\s*//' -e 's/\s*$//')
      val=$(echo $line | cut -d: -f2 | sed -e 's/^\s*//' -e 's/\s*$//')

      echo "line=$line"
      echo "key=$key"
      echo "val=$val"
      if [ ! -z $key ]; then
        echo "export $key=$val"
        # 不可以直接执行export，否则变量值还是字符串，例如MY_JAVA_HOME变量值仍为$MY_HOME/jre/bin，而不是/local/install/myhome/jre/bin
        eval export $key=$val
        # 变量的二次引用 这里${!key}不好使 		
        eval newVal=\${$key}
        echo "$key=$newVal"
      fi
      echo ""
    fi
  done
}

getCustEnv

标题：Shell逐行读取、解析并export变量实践
作者：mryqu
声明： 本博客所有文章除特别声明外，均采用 CC BY-NC-SA 3.0 CN 许可协议。转载请注明出处！


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