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|
local fw = require 'bee.filewatch'
local fs = require 'bee.filesystem'
local await = require 'await'
local MODIFY = 1 << 0
local RENAME = 1 << 1
local function exists(filename)
local path = fs.path(filename)
local suc, res = pcall(fs.exists, path)
if not suc or not res then
return false
end
suc, res = pcall(fs.canonical, path)
if not suc or res:string() ~= path:string() then
return false
end
return true
end
---@class filewatch
local m = {}
m._eventList = {}
function m.watch(path)
local id = fw.add(path)
return function ()
fw.remove(id)
end
end
function m.event(callback)
m._eventList[#m._eventList+1] = callback
end
function m._callEvent(changes)
for _, callback in ipairs(m._eventList) do
await.call(function ()
callback(changes)
end)
end
end
function m.update()
local collect
for _ = 1, 100 do
local ev, path = fw.select()
if not ev then
break
end
if not collect then
collect = {}
end
if ev == 'modify' then
collect[path] = (collect[path] or 0) | MODIFY
elseif ev == 'rename' then
collect[path] = (collect[path] or 0) | RENAME
end
end
if not collect or not next(collect) then
return
end
local changes = {}
for path, flag in pairs(collect) do
if flag & RENAME ~= 0 then
if exists(path) then
changes[#changes+1] = {
type = 'create',
path = path,
}
else
changes[#changes+1] = {
type = 'delete',
path = path,
}
end
elseif flag & MODIFY ~= 0 then
changes[#changes+1] = {
type = 'change',
path = path,
}
end
end
m._callEvent(changes)
end
return m
|
