Batch Script - Parameter Nested Inside Variable? -

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here's scenario:

i have parent script calls dozen child scripts, 1 of complex folder/file syncing operation. each of child scripts writes variable batch file (e.g. variable.bat), loaded parent script @ next execution.

the folder syncing script chooses large list of folders based upon parameter passed via parent script.

the child script's set command looks this:

echo set pair-folder-%1=yes>>c:\variable.bat

this produces variable @ next run loaded parent script. herein lies rub: how script action (via if trap) calls variable next time child script comes around? imagine if trap this:

if %pair-folder-%1%=yes goto nopair

the problem can't seem batch interpret correctly - have tried nesting variable few different ways, using delayed expansion, etc. necessary map parameter local variable first?

basically, once parent scripts calls variable.bat @ next execution, how reference newly set variable within child script?

since appending set pair-folder-%1=yes lines variable.bat you'll varable.bat establish increasing set of pair-folder-* variables.

now if want check whether pair-folder-% set, then

if defined pair-folder-%1 ...

will you.

if want find value of pair-folder-%1 (ie it's not set or not set) then

set "valuefound=" /f "tokens=1*delims==" %%i in ( 'set pair-folder-%1 2^>nul' ) (  if /i "%%i"=="pair-folder-%1" set "valuefound=%%j" )

should - valuefound "set" no value (ie undefined) if variable undefined else value.


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