Multi folder workspace only picks up build file in the first folder

[tschf]

If I have multiple project folders, currently it only observed the build file from the first folder.

Notes: On first activation, go over all workspace folders to set up build targets:

vcode.workspace.workspaceFolders

Then, when compiling a specific file, get the workspace of the active file to select a target from relevant workspace:

vscode.workspace.getWorkspaceFolder(uri)

See: https://code.visualstudio.com/docs/extensionAPI/vscode-api#_workspace

[tschf]

cc/ @martindsouza

[martindsouza]

@tschf Good description of what is happening. Some thoughts:

• re Activation: I frequently open and close "root" based folders in VSC. So the current folder may not be registered at the time of initial activation.
• We discussed the option of a .vscode folder. I know you want an agnostic approach (for Atom etc) but it's something to consider. I've seen a lot of projects do this. It keeps the editor specific files outside of the root of the main project. Think outside of this project. If all extensions did this it could make a project look cluttered.