[request] libraries needed to update conan/examples: emsdk, imgui, glfw, glew, folly

[czoido]

We are in the process of updating the conan examples repo to use recipes from conan center index and updating Windows configurations to vs 2019 but there are some libraries missing: emsdk, imgui, glfw, glew, folly
Without them, the update to c3i is not possible and the ci fails.

[czoido]

@uilianries, @SSE4, could you please have a look at these recipes, to see if they can be included in c3i so we can update the examples repository and Conan documentation soon?

[ericLemanissier]

glfw and glew require https://github.com/bincrafters/conan-mesa and https://github.com/bincrafters/conan-x11/, the main problem with conan-x11 is that it's a "meta-recipe" which generates a lot of packages (49), so it does not fit the CCI structure. Also, it does not have proper tests currently.
imgui seems easily transferable. folly can be transferred once we transfer libiberty
EDIT: imgui already has a PR: #625

[SSE4]

I think we have most of the things mentioned, probably except emsdk

[solvingj]

@SSE4 do you see any issue with submitting emscripten_installer to CCI?

We're also going to do emscripten stuff here, and it would be better if it were a supported CCI package.

conan-io/conan#7816

[SSE4]

sorry, completely missed the question :)
late is better than never, so answering
I personally don't see any problem with emsdk
in fact, we already have PR submitted: #6163
the only blocking/tentative thing is that emsdk downloads its own installations of nodejs, python, etc.
this might be tricky to bypass, or we may just agree to live with it for now

[SSE4]

already in CCI:

glew/2.1.0
glew/2.2.0
imgui/1.74
imgui/1.75
imgui/1.76
imgui/1.77
imgui/1.78
imgui/1.79
imgui/1.80
imgui/1.81
imgui/1.82
imgui/1.83
imgui/1.84.1
imgui/1.84.2
glfw/3.3.2
glfw/3.3.3
glfw/3.3.4 
folly/2019.10.21.00
folly/2020.08.10.00

so emsdk is the last nail

[jgsogo]

I'm adding the closes keyword from PR #6163 😃