Shell-$(cd "$(dirname "$0")",pwd)
#!/bin/bash
BIN_FOLDER=$(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
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BIN_FOLDER = $(cd "$(dirname "$0")",pwd) 解析：
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1、取当前运行脚本的所在路径： $0
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2、取当前脚本所在路径的父目录： dirname "$0"
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3、取返回的父目录的值： $(dirname "$0")
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4、cd到返回的父目录： cd "$(dirname "$0")"
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5、输出地址： cd "$(dirname "$0")",pwd
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6、取输出的地址，并赋值给BIN_FOLDER： BIN_FOLDER = $(cd "$(dirname "$0")",pwd)
