opus/sys/apis/fs/linkfs.lua

local linkfs = { }

local methods = { 'exists', 'getFreeSpace', 'getSize', 
  'isDir', 'isReadOnly', 'list', 'makeDir', 'open', 'getDrive' }

for _,m in pairs(methods) do
  linkfs[m] = function(node, dir, ...)
    dir = dir:gsub(node.mountPoint, node.source, 1)
    return fs[m](dir, ...)
  end
end

function linkfs.mount(dir, source)
  if not source then
    error('Source is required')
  end
  source = fs.combine(source, '')
  if fs.isDir(source) then
    return {
      source = source,
      nodes = { },
    }
  end
  return {
    source = source
  }  
end

function linkfs.copy(node, s, t)
  s = s:gsub(node.mountPoint, node.source, 1)
  t = t:gsub(node.mountPoint, node.source, 1)
  return fs.copy(s, t)
end

function linkfs.delete(node, dir)
  if dir == node.mountPoint then
    fs.unmount(node.mountPoint)
  else
    dir = dir:gsub(node.mountPoint, node.source, 1)
    return fs.delete(dir)
  end
end

function linkfs.find(node, spec)
  spec = spec:gsub(node.mountPoint, node.source, 1)

  local list = fs.find(spec)
  for k,f in ipairs(list) do
    list[k] = f:gsub(node.source, node.mountPoint, 1)
  end

  return list
end

function linkfs.move(node, s, t)
  s = s:gsub(node.mountPoint, node.source, 1)
  t = t:gsub(node.mountPoint, node.source, 1)
  return fs.move(s, t)
end

return linkfs