windows-bat配置环境变量的几个坑点

今天因为学校机房问题，想自动化安装vim，不料在编bat的时候不熟练，搞了很久。

坑点1.%path%访问到的是用户的path，而不是系统的path。所以增加环境变量的时候只能增加用户的path。我就是因为增加了系统的path，弄了N个小时。

坑点2：修改完环境变量后，必须进入GUI配置环境变量的地方，这样它才会更新。不然不会更新！！我就是没有注意到这一点，调试的时候莫名其妙。

wmic ENVIRONMENT create name="curdisk",username="%computername%\%username%",VariableValue="C:" 
wmic ENVIRONMENT create name="vimpath",username="%computername%\%username%",VariableValue="C:Program Files (x86)Vim" 
wmic ENVIRONMENT create name="devcpppath",username="%computername%\%username%",VariableValue="C:Program Files (x86)Dev-Cpp" 

echo 请打开一遍环境变量~
pause

wmic ENVIRONMENT where "name='Path' and UserName='%computername%\%username%'" set VariableValue="%path%%devcpppath%MinGW64in;%vimpath%Vim80;%vimpath%;%devcpppath%MinGW64x86_64-w64-mingw32in;"

echo 请打开一遍环境变量，然后删掉多余的项~

wmic ENVIRONMENT create name="LIBRARY_PATH",username="%computername%\%username%",VariableValue="%devcpppath%MinGW64lib32;%devcpppath%MinGW64x86_64-w64-mingw32lib32;" 

wmic ENVIRONMENT create name="C_INCLUDE_PATH",username="%computername%\%username%",VariableValue="%devcpppath%MinGW64include;%devcpppath%MinGW64x86_64-w64-mingw32include;%devcpppath%MinGW64libgccx86_64-w64-mingw324.8.1include;" 

wmic ENVIRONMENT create name="CPLUS_INCLUDE_PATH",username="%computername%\%username%",VariableValue="%devcpppath%MinGW64include;%devcpppath%MinGW64x86_64-w64-mingw32include;%devcpppath%MinGW64libgccx86_64-w64-mingw324.8.1include;%devcpppath%MinGW64libgccx86_64-w64-mingw324.8.1includec++;" 

pause