How to use the system environment variables in the settings.txt when invoking a path?

[WuSiren]

Specifically, when I configure the inverse search:

"D:\MyPath\VSCode\Code.exe" "D:\MyPath\VSCode\resources\app\out\cli.js" --ms-enable-electron-run-as-node -r -g "%f:%l"

I want to type the following code for some convenience:

"$(MyPath)\VSCode\Code.exe" "$(MyPath)\VSCode\resources\app\out\cli.js" --ms-enable-electron-run-as-node -r -g "%f:%l"

where MyPath is a system environment variable whose value is D:\MyPath.

I have tried it and found that $(MyPath) does work, but once it works, the $(MyPath) will be replaced by the absolute path string D:\MyPath, and the inverse search command will become:

"D:\MyPath\VSCode\Code.exe" "D:\MyPath\VSCode\resources\app\out\cli.js" --ms-enable-electron-run-as-node -r -g "%f:%l"

which is not convenient for portable usage.

[GitHubRulesOK]

system environmental settings are not generally available to the calling methods such as external viewers/editors
the call can be an exe or a.cmd file they will use cmd environmental such as %~dp0 for that CMD files location

Hard to describe how best to use, as that is why it has a command line to set the reverse calling ONCE per NEW drive when constantly changing as in portable usage. I never had much issue using a starter batch file to set SumatraPDF to work on USB with dozens of testing editors on same changing device root:\ the key was to only recall when moved to another drive letter.

[WuSiren]

Thank you very much for your kind reply!

I never had much issue using a starter batch file to set SumatraPDF to work on USB with dozens of testing editors on same changing device root:\

Could you please provide more details on how you write such a batch file for the starter configuration? Thanks!

[GitHubRulesOK]

Sorry for delay I thought I had posted this older example and it may not be what I finally used as that machine is not here.
So try to adapt to your own requirements.

set "drive=%~d0"
set "dirPath=%CD%"
REM for a fixed location from drive root use something like
REM set "SumatraPDF=%drive%SumatraPDF\SumatraPDF(32bit).exe"
REM for relative use here I am using 
set "SumatraPDF=..\..\..\apps\pdf\sumatrapdf\SumatraPDF(32bit).exe"

REM Batch files need each used % to be doubled %% and quotes are another problem
REM InverseSearchCmdLine = notepad.vbs %%l "%%f"

set "Inverse=\"%CD%\notepad.vbs\" %%l \"%%f\""

"%SumatraPDF%" -forward-search "sync.tex" 1 "sync.pdf" -inverse-search "%Inverse%" 

pause & exit /b

REM how to open a couple of pdf in current folder using edge as if the example editor
REM following will vary depending on OS location

set "msedge=%ProgramFiles%\Microsoft\Edge\Application\msedge.exe"
for /f "usebackq delims==" %%f in (`dir /b "%dirPath%"\*.pdf`) do (

        start "WindowName" "%msedge%" --app="%dirPath%\%%f"

)
pause

[WuSiren]

Ah, thanks! Although I am not very familiar with the batch language, I think you answer is so helpful that it is just what I need and I will study it line by line. 👍