Tools: Using env variable in Path

Support
1

I am using MP3Tag as portable and my tools are also portable. As the drive letter is not consistent, I'm trying to use %PortableApps.comApps% environment variable as base path in Path but it is not working. If I replace this variable with literal path it works. From my Tools ini:

[#2]
MTTOOLSNAME=SendTo LosslessCut
MTTOOLSPARAM="%_path%"
MTTOOLSPATH=%PortableApps.comApps%\LosslessCutPortable\LosslessCutPortable.exe
MTTOOLSINST=0

Is it supported but I am doing it wrong?
Is it not supported but there is an alternate way?
If not supported and not an easy alternative, can this be added as a wish item?

2

See the documentation on the scripting function to get environment variables:

3

Nope, can't get it to work and not sure if scripting is allowed in the path. I've tried

MTTOOLSPATH=$getenv("PortableApps.comApps")\LosslessCutPortable\LosslessCutPortable.exe
MTTOOLSPATH=$getenv(PortableApps.comApps)\LosslessCutPortable\LosslessCutPortable.exe
MTTOOLSPATH=$getenv("PortableApps.comApps")+\LosslessCutPortable\LosslessCutPortable.exe

I did find a reasonable workaround using relative path, since I use PortableApps.com and have MP3Tag set up in the standard folder structure where all the app folders are under the same parent. I think this will work even better.
MTTOOLSPATH=..\LosslessCutPortable\LosslessCutPortable.exe

4

As far as I understand it, you set the environment variables outside MP3tag and then reference them with $getenv().
Here are some examples:

5

I understand that. I am setting the environment variables before launching MP3Tag. I am successfully using $getenv() in other areas. I understand and am using scripting in other custom actions. The issue is using it in the MTTOOLSPATH property of a Tool item.

I am using scripting in the MTTOOLSPARAM property but I've not seen any example of it used in the MTTOOLSPATH property. The MTTOOLSPATH property is set by a file picker in the UI.

[#2]
MTTOOLSNAME=SendTo LosslessCut
MTTOOLSPARAM="%_path%"
MTTOOLSPATH=..\LosslessCutPortable\LosslessCutPortable.exe
MTTOOLSINST=0