Install an Extension Into Any Root Suffix

The other day in the extendvs Gitter room, Amadeusz Wieczorek (@AmadeusW) asked if he could use the command-line vsix installer to install an extension into a root suffix of his choice.

He explained that he had an issue where Roslyn deploys only to /RoslynDev and his extension deploys only to /Exp when debugging it. He wanted to manually drop one of them to the other root suffix.

Amadeusz mentioned to Alex Eyler (@AlexEyler), who is in the VS Team, that he’d heard there is a new command line switch.

Alex replied that yes, there is in Dev15 - /rootSuffix. But he thought that it has some issues with nested extensions.

The odd thing was when I checked the help dialog, the /rootSuffix switch isn’t shown among the rest of the switches in the help screen.

VSIX Installer Exe

I checked the version number in the properties dialog of vsixinstaller.exe, and it shows the version number as 15.0.26323.1, so I was definitely using the VSIX V3 installer that was released with VS 2017 (aka Dev15).

VSIX Installer Properties

I haven’t had time to try it out myself yet, so if anyone knows for sure whether this method works or not, please let me know and I’ll update this blog post.

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