如何使用 batch 脚本操作环境变量

rem local environment
reg delete "HKCUEnvironment" /f /v {ENVIRONMENT_VARIABLE_NAME}

rem system environment
reg delete "HKLMSYSTEMCurrentControlSetControlSession ManagerEnvironment" /f /v {ENVIRONMENT_VARIABLE_NAME}

set emptyWord=

rem remove from local environment path
FOR /F "skip=2 tokens=2,*" %%A IN ('reg query "HKCUEnvironment" /v "Path"') DO set "localPath=%%B"
call set newPath=%%localPath:%{OLD_PATH}%=%emptyWord%%%
reg add "HKCUEnvironment" /f /v Path /t REG_SZ /d "%newPath%"

rem remove from system environment path
FOR /F "skip=2 tokens=2,*" %%A IN ('reg query "HKCUEnvironment" /v "Path"') DO set "systemPath=%%B"
call set newPath=%%systemPath:%{OLD_PATH}%=%emptyWord%%%
reg add "HKLMSYSTEMCurrentControlSetControlSession ManagerEnvironment" /f /v Path /t REG_SZ /d "%newPath%"

参考

• https://www3.ntu.edu.sg/home/ehchua/programming/howto/Environment_Variables.html#:~:text=To list all the environment variables%2C use the command " env,Windows uses %varname% ).