[wasm] Install 7z in windows helix image

[radekdoulik]

Context: to reduce size in dotnet/runtime#54451
from cca 1.1GB to 220MB when using 7z instead of zip

[mthalman]

There's a license associated with 7-Zip that will need to be included due to the binary redistribution: https://www.7-zip.org/license.txt.

[radekdoulik]

There's a license associated with 7-Zip that will need to be included due to the binary redistribution: https://www.7-zip.org/license.txt.

The installer puts the license in the destination dir.

C:\Work>dir \7z
 Volume in drive C has no label.
 Volume Serial Number is EC20-EEE0

 Directory of C:\7z

07/12/2021  09:48 PM    <DIR>          .
07/12/2021  09:48 PM    <DIR>          ..
02/20/2019  01:00 PM           108,074 7-zip.chm
02/21/2019  06:00 PM            78,336 7-zip.dll
02/21/2019  06:00 PM            50,688 7-zip32.dll
02/21/2019  06:00 PM         1,679,360 7z.dll
02/21/2019  06:00 PM           468,992 7z.exe
02/21/2019  06:00 PM           205,824 7z.sfx
02/21/2019  06:00 PM           186,880 7zCon.sfx
02/21/2019  06:00 PM           867,840 7zFM.exe
02/21/2019  06:00 PM           581,632 7zG.exe
01/28/2018  11:00 AM               366 descript.ion
02/22/2019  11:26 AM            48,844 History.txt
07/12/2021  09:48 PM    <DIR>          Lang
01/09/2019  12:15 PM             3,990 License.txt
02/22/2019  11:28 AM             1,688 readme.txt
02/21/2019  07:00 PM            15,360 Uninstall.exe
              14 File(s)      4,297,874 bytes
               3 Dir(s)  21,246,578,688 bytes free

Hopefully that should be fine then. Or should I download it explicitely?

[mthalman]

Ah, that should be fine. I didn't look closely enough and just thought it was copying a CLI executable instead of an installer.