Estimating required disk space

[vojab]

Hi everyone,

I'm using InstallAware 18 (Build 1.29.14) Developer edition.
I have installation setup which extracts contents from the 7z archive to the target directory.
7z archive is distributed separately -it is not part of the InstallAware project.

I'm wondering is there any way to estimate required disk space based on the uncompressed 7z archive size ?
Currently it shows incorrect required disk space during installation (see screenshot attached).

I already spend a lot of time trying to figure this out, and I browsed this forum, but didn't found a solution.
Thing that crossed my mind was reading file size using call DLL method, and than manually setting component space,
but that will show compressed file size.

Thank you in advance,

[FrancescoT]

Dear Vojab,

Unfortunately it's not available a method that can be used at setup Runtime to get the un-compressed size of a 7zip archive.

the only option that you may try, it's to verify if the "7Zip library SDK" implements a Function able to return the un-compressed size of a given compressed archive. Honestly, I don't recall if it exists.

Of course with the above approach there is some work to do (if applicable).
You have to develop a custom DLL that implements the internal calls to "7Zip library" and to export a method that can be called with the "Call DLL function" from your script.

Hope this helps you.