What does Setlocal Enabledelayedexpansion meaning?

ENABLEDELAYEDEXPANSION is a parameter passed to the SETLOCAL command (look at setlocal /? ) Its effect lives for the duration of the script, or an ENDLOCAL : When the end of a batch script is reached, an implied ENDLOCAL is executed for any outstanding SETLOCAL commands issued by that batch script.

What is the use of Enabledelayedexpansion?

Delayed Expansion will cause variables within a batch file to be expanded at execution time rather than at parse time, this option is turned on with the SETLOCAL EnableDelayedExpansion command. By default expansion will happen just once, before each line is executed.

What does Setlocal mean in batch file?

Use setlocal to change environment variables when you run a batch file. Environment changes made after you run setlocal are local to the batch file. The Cmd.exe program restores previous settings when it encounters an endlocal command or reaches the end of the batch file.

What does Setlocal mean?

setlocal localizes changes that are made to variables (in the documentation referred to as environment). The changes are reverted back with endlocal . setlocal is affected by whether command extensions are enabled or disabled. setlocal has no effect when not used in a batch file.

What is Pushd dp0?

pushd %~dp0. is often used to change to the original directory from which the batch was started. This is very useful in newer OS’s when the user may ‘Run as administrator’ which changes the current directory for you! Try it sometime. Just make a simple bat @echo off echo.CD=%CD% pushd %~dp0 echo.CD=%CD% pause.

What is Endlocal in batch file?

Endlocal syntax Ends localization of environment changes in a batch file. Environment changes made after ENDLOCAL is issued are not local to the batch file; the previous settings are not restored on termination of the batch file.

What does Enableextensions do?

EnableExtensions Attempt to enable Command extensions. DisableExtensions Attempt to disable Command extensions. SETLOCAL on it’s own, usually at the start of a batch file, will begin localisation of Environment Variables.

Why is echo off?

batch-file Echo @Echo off @echo off prevents the prompt and contents of the batch file from being displayed, so that only the output is visible. The @ makes the output of the echo off command hidden as well.

What is Pushd and Popd Linux?

The pushd command is used to save the current directory into a stack and move to a new directory. Furthermore, popd can be used to return back to the previous directory that is on top of the stack. It is very useful when we have to switch between two directories frequently.

Do I need Endlocal?

endlocal is implicitly executed when exiting a batch file (by exit , exit /B , goto :EOF or reaching its end) and when returning from a called batch-file or sub-routine (run by call ) as often as required to revert all (nested) environment localisations done by setlocal .