vswhere: new recipe

[valgur]

Summary

Changes to recipe: vswhere/3.1.7

Motivation

CLI tool to locate Visual Studio 2017 and newer installations. https://github.com/microsoft/vswhere

Used by NSS to configure MSVC support in #19262: https://github.com/nss-dev/nss/blob/NSS_3_104_RTM/coreconf/msvc.sh#L47-L48

While the dependency in NSS could probably be patched around, the tool is simple to package and possibly useful in other contexts as well.

Details

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• Read the contributing guidelines
• Checked that this PR is not a duplicate: list of PRs by recipe
• Tested locally with at least one configuration using a recent version of Conan

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 1 (31bbbd8f299d2de6cac6df4a22290d185b3af8aa):

• vswhere/3.1.7:
  All packages built successfully! (All logs)

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Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 1 (31bbbd8f299d2de6cac6df4a22290d185b3af8aa):

• vswhere/3.1.7:
  All packages built successfully! (All logs)

[Nekto89]

Is it possible to not have this tool at all on machines with VS installed?

vswhere is included with the installer as of Visual Studio 2017 version 15.2 and later, and can be found at the following location: %ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe

[valgur]

Is it possible to not have this tool at all on machines with VS installed?

vswhere is included with the installer as of Visual Studio 2017 version 15.2 and later, and can be found at the following location: %ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe

Ah, good point. I missed that fact. It was not found on PATH when building NSS, though, despite VCVars being activated. Might need additional setup.

[valgur]

I would still add it as a CCI package. vswhere is guaranteed to be installed only on VS 2017 / 15.2. It's normally not found on PATH, though. The recipes will need to include env.append_path("PATH", r"C:\Program Files (x86)\Microsoft Visual Studio\Installer") for it to be found. And event then it feels a bit fragile.

See also: https://github.com/Microsoft/vswhere/wiki/Installing