102 lines
2.3 KiB
Lua
102 lines
2.3 KiB
Lua
local fw = require 'bee.filewatch'
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local fs = require 'bee.filesystem'
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local await = require 'await'
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local MODIFY = 1 << 0
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local RENAME = 1 << 1
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local function isExists(filename)
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local path = fs.path(filename)
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local suc, exists = pcall(fs.exists, path)
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if not suc or not exists then
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return false
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end
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local suc, res = pcall(fs.canonical, path)
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if not suc or res:string() ~= path:string() then
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return false
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end
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return true
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end
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---@class filewatch
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local m = {}
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m._eventList = {}
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m._watchings = {}
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function m.watch(path)
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if m._watchings[path] then
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m._watchings[path].count = m._watchings[path].count + 1
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else
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m._watchings[path] = {
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count = 1,
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id = fw.add(path),
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}
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log.debug('fw.add', path)
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end
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local removed
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return function ()
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if removed then
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return
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end
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removed = true
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m._watchings[path].count = m._watchings[path].count - 1
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if m._watchings[path].count == 0 then
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fw.remove(m._watchings[path].id)
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m._watchings[path] = nil
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log.debug('fw.remove', path)
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end
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end
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end
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---@param callback async fun()
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function m.event(callback)
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m._eventList[#m._eventList+1] = callback
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end
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function m._callEvent(ev, path)
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for _, callback in ipairs(m._eventList) do
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await.call(function ()
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callback(ev, path)
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end)
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end
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end
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function m.update()
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local collect
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for _ = 1, 10000 do
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local ev, path = fw.select()
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if not ev then
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break
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end
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log.debug('filewatch:', ev, path)
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if not collect then
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collect = {}
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end
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if ev == 'modify' then
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collect[path] = (collect[path] or 0) | MODIFY
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elseif ev == 'rename' then
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collect[path] = (collect[path] or 0) | RENAME
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end
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end
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if not collect or not next(collect) then
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return
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end
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for path, flag in pairs(collect) do
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if flag & RENAME ~= 0 then
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if isExists(path) then
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m._callEvent('create', path)
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else
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m._callEvent('delete', path)
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end
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elseif flag & MODIFY ~= 0 then
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m._callEvent('change', path)
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end
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end
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end
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return m
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