End localisation of environment changes in a batch file. Pass variables from one batch file to another.
If SETLOCAL is used to make variables 'local' to one batch script, then those variables will be invisible to all other batch scripts unless explicitly passed using an ENDLOCAL & SET... command.
If SETLOCAL is used without a corresponding ENDLOCAL then local environment variables will be discarded when the batch file ends. Ending the cmd.exe session will discard all Environment Variables both local and global.
Passing variables from one routine to another
The CMD command processor always works on a line-by-line basis, so it will convert all %variables% into their text values before executing any of the commands.
By putting ENDLOCAL & SET commands on a single line you are able to SET a variable just before the localisation is ended by the ENDLOCAL command.
::Sales.cmd @Echo off SETLOCAL Set _item="Ice Cream Maker" Set _price=450 ENDLOCAL & SET _return1=%_item%& SET _return2=%_price% ::Results.cmd @Echo off SETLOCAL CALL Sales.cmd Echo [%_return1%] will cost [%_return2%] ::SubDemo.cmd @Echo off SETLOCAL CALL sub_products Echo [%_return1%] will cost [%_price%] :sub_products SETLOCAL Set _item="Coffee Grinder" Set _price=150 ENDLOCAL & SET _return1=%_item%& SET _price=%_price%
Multiple SET commands may be added to pass multiple variables, just prefix each with an &.
Be aware that any trailing spaces will be added to the variables value.
"A good place to visit, but a poor place to stay" - Josh Billings
SETLOCAL - Begin localisation of environment variables in a batch file.
Equivalent bash command (Linux): readonly - Mark variables/functions as readonly