A Customfile for VVV to auto-create synced folders for specific VVV site and bash file to convert shared folder to symlinks.

Customfile.rb

# -*- mode: ruby -*-
# vi: set ft=ruby :

config.vm.provider :virtualbox do |v|
    v.customize ["setextradata", :id, "VBoxInternal2/SharedFoldersEnableSymlinksCreate/v-root", "1"]
    #v.memory = 2048
end

# config.vm.synced_folder "/Users/afragen/Documents/github/github-updater", "/srv/www/test3/htdocs/wp-content/plugins/github-updater", :owner => "www-data", :mount_options => [ "dmode=775", "fmode=774" ]

vvvsites = [
    'multi-test',
    'single-test',
]
git_plugins = [
    'add-custom-header-images',
    'airplane-mode',
    'category-colors-options',
    'drmc-medical-staff-governance',
    'embed-pdf-viewer',
    'github-updater',
    'github-updater-additions',
    'local-development',
    'losrobles-governance',
    'pods',
    'resend-welcome-email',
    'the-events-calendar-category-colors',
    'the-events-calendar-pro-alarm',
    'the-events-calendar-user-css',
    'wp-install-dependencies',
    'wp-polls',
]
git_themes = [
    'losrobles-theme',
]
localgit = '/Users/afragen/Documents/github/'
localvagrant = '/Users/afragen/vagrant-local/www/'

vvvsites.each do |site|
    git_repos = {}
    plugins_path = '/srv/www/' + site + '/htdocs/wp-content/plugins/'
	themes_path = '/srv/www/' + site + '/htdocs/wp-content/themes/'

    git_plugins.each do |plugin|
        git_repos.merge!( localgit + plugin => plugins_path + plugin )
    end
    git_themes.each do |theme|
        git_repos.merge!( localgit + theme => themes_path + theme )
    end
	git_repos.each do |local, vvv|
        config.vm.synced_folder local, vvv, :owner => 'www-data', :mount_options => [ 'dmode=775', 'fmode=774' ]
    end
end

# Remove all synched folders at startup.
# This seems to run first.
# Unfortunately also runs with `vagrant ssh`, etc.
vvvsites.each do |site|
	plugins_localpath = localvagrant + site + '/htdocs/wp-content/plugins/'
	themes_localpath = localvagrant + site + '/htdocs/wp-content/themes/'
    vagrant_shared_folders = []

    git_plugins.each do |plugin|
        vagrant_shared_folders.push( plugins_localpath + plugin )
    end
    git_themes.each do |theme|
        vagrant_shared_folders.push( themes_localpath + theme )
    end
    vagrant_shared_folders.each do |folder|
        if File.symlink?( folder )
            %x[rm -r #{folder}]
        end
    end
end

vagrant_symlink.sh

#! /bin/bash
# Use `./vagrant_symlink.sh link` to add symlinks,
# Calling script without a parameter will just delete all symlinks

if test -n "$1"; then
	param="link"
else
	param=false
fi

vvvsites=(
	'multi-test'
	'single-test'
)

git="/Users/afragen/Documents/github"
vagrant_path="/Users/afragen/vagrant-local/www"
vagrant_plugin_path="htdocs/wp-content/plugins"
vagrant_theme_path="htdocs/wp-content/themes"

git_plugins=(
	'add-custom-header-images'
	'airplane-mode'
	'category-colors-options'
	'drmc-medical-staff-governance'
	'embed-pdf-viewer'
	'github-updater'
	'github-updater-additions'
	'local-development'
	'losrobles-governance'
	'pods'
	'resend-welcome-email'
	'the-events-calendar-category-colors'
	'the-events-calendar-pro-alarm'
	'the-events-calendar-user-css'
	'wp-install-dependencies'
	'wp-polls'
)

git_themes=(
	'losrobles-theme'
)

for j in ${vvvsites[@]}; do
	for i in ${git_plugins[@]}; do
		if [ -e $vagrant_path/${j}/${vagrant_plugin_path}/${i} ]; then
			rm -r $vagrant_path/${j}/${vagrant_plugin_path}/${i}
		fi
		if [ "link" == $param ]; then
			ln -s $git/${i} $vagrant_path/${j}/${vagrant_plugin_path}
		fi
	done
	for i in ${git_themes[@]}; do
		if [ -e $vagrant_path/${j}/${vagrant_theme_path}/${i} ]; then
			rm -r $vagrant_path/${j}/${vagrant_theme_path}/${i}
		fi
		if [ "link" == $param ]; then
			ln -s $git/${i} $vagrant_path/${j}/${vagrant_theme_path}
		fi
	done
done