vscode:// url redirect does not open vscode. No alternatives offered.

Issue Type: Bug

1. On Ubuntu run snap install vscode to install from the snap store
2. Start vscode using the icon in the dashboard
3. Install the GitHub Pull Requests plugin and click the popup to login
4. Login to GitHub and click the “Continue” button
5. If the browser prompts to run xdg-open approve the request (this is the Linux mechanism to launch URL handlers
6. VSCode does not receive the URL trigger because snaps don’t provide an interface for this feature yet.
7. Try to find an alternative way to trigger vscode with the URL directly, such as on the commandline, but realise there is no documentation on how to do such things 😃
8. That’s it.

The vscode cannot be triggered via the URL handling mechanism as mentioned because of snap limitations currently. There is no alternative mechanism to get the URL to vscode that is readily identifiable to a user. It would be handy to provide a command line snippet that will achieve the same as the URL handler for cases where the URL handler fails.

Extension version: 0.2.0 VS Code version: Code 1.28.0 (431ef9da3cf88a7e164f9d33bf62695e07c6c2a9, 2018-10-05T14:52:58.945Z) OS version: Linux x64 4.15.0-36-generic

System Info

Item	Value
CPUs	Intel® Core™ i7-6700 CPU @ 3.40GHz (8 x 3834)
GPU Status	2d_canvas: unavailable_software checker_imaging: disabled_off flash_3d: unavailable_software flash_stage3d: unavailable_software flash_stage3d_baseline: unavailable_software gpu_compositing: unavailable_software multiple_raster_threads: enabled_on native_gpu_memory_buffers: disabled_software rasterization: unavailable_software video_decode: unavailable_software video_encode: unavailable_software webgl: enabled_readback webgl2: unavailable_off
Load (avg)	2, 2, 2
Memory (System)	31.30GB (0.40GB free)
Process Argv	.
Screen Reader	no
VM	0%

[queerviolet]

We can add a copy-paste fallback for if the protocol handler fails.

[queerviolet]

@pdf — It needs read/write on all your repos, public and private.  I’ll update the docs with that information.