[vcpkg] `vcpkg-init.cmd` returns a non-zero exit code on success

[benmcmorran]

Describe the bug

The vcpkg-init.cmd script shows usage information and returns a non-zero exit code despite successfully adding vcpkg to the shells environment.

Environment

• OS: WIndows 10 CMD
• Compiler: N/A

To Reproduce Run these commands in a Windows CMD prompt where vcpkg is already installed.

1. git clone https://github.com/azure-rtos/getting-started
2. cd getting-started\MXChip\AZ3166
3. vcpkg activate As expected, this returns an error because vcpkg has not yet been initialized.
4. %USERPROFILE%\.vcpkg\vcpkg-init.cmd Note that usage information is displayed.
5. echo %errorlevel%

Expected result: 0 Actual result: 1

Note that even though the exit code is non-zero, running vcpkg activate now will succeed.

[Cheney-W]

I can't reproduce this issue in my side, my errorlevel is 0.

[benmcmorran]

Looks like this only repros if vcpkg is installed, but not already initialized. Much simpler repro steps (all in Windows CMD):

1. curl -LO https://aka.ms/vcpkg-init.cmd && .\vcpkg-init.cmd
2. Close the terminal window and open a new Windows CMD window.
3. %USERPROFILE%\.vcpkg\vcpkg-init.cmd
4. echo %errorlevel%