config.js

const activate = (oni) => {
    console.log("config activated")

    // Per-workspace init.vim
    const path = require("path")
    const fs = require("fs")

    const loadWorkspaceInitVim = () => {
        if (oni.workspace.activeWorkspace) {
            // We're assuming it lives in `.oni/init.vim`
            const initVimFile = path.join(oni.workspace.activeWorkspace, ".oni", "init.vim")

            if (fs.existsSync(initVimFile)) {
                oni.editors.activeEditor.neovim.command(":so " + initVimFile)
            }
        }
    }

    // Load the per-workspace init vim whenever it changes
    oni.workspace.onDirectoryChanged.subscribe(() => loadWorkspaceInitVim())
    // And also on startup, in case we already have a workspace
    loadWorkspaceInitVim()
    // End per-workspace init.vim
  ...
}