$(cd "$(dirname "$0")",pwd) 解析

xx.sh 文件內容如下：

#!/bin/bash
BIN_FOLDER=$(cd "$(dirname "$0")";pwd)
echo $BIN_FOLDER
PROJECT_FOLDER=$(cd "$(dirname "$BIN_FOLDER")";pwd)
echo $PROJECT_FOLDER
PYTHON_BIN=$PROJECT_FOLDER/.venv/bin/python
echo $PYTHON_BIN

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

1、取當前運行腳本的所在路徑：　$0

2、取當前腳本所在路徑的父目錄：　dirname "$0"

3、取返回的父目錄的值：　$(dirname "$0")

4、cd到返回的父目錄：　cd "$(dirname "$0")"

5、輸出地址：　cd "$(dirname "$0")",pwd

6、取輸出的地址，並賦值給BIN_FOLDER：　BIN_FOLDER = $(cd "$(dirname "$0")",pwd)