$(cd $(dirname $0) pwd) 解析

xx.sh 文件内容如下：

#!/bin/bashBIN_FOLDER=$(cd "$(dirname "$0")";pwd)echo $BIN_FOLDERPROJECT_FOLDER=$(cd "$(dirname "$BIN_FOLDER")";pwd)echo $PROJECT_FOLDERPYTHON_BIN=$PROJECT_FOLDER/.venv/bin/pythonecho $PYTHON_BIN

BIN_FOLDER = $(cd "$(dirname "$0")",pwd) 解析：

1、取当前运行脚本的所在路径：$0

2、取当前脚本所在路径的父目录：dirname "$0"

3、取返回的父目录的值：$(dirname "$0")

4、cd到返回的父目录：cd "$(dirname "$0")"

5、输出地址：cd "$(dirname "$0")",pwd

6、取输出的地址，并赋值给BIN_FOLDER：BIN_FOLDER = $(cd "$(dirname "$0")",pwd)