First commit

lurker.lua

@@ -0,0 +1,100 @@
+--
+-- lurker 
+--
+-- Copyright (c) 2014, rxi
+--
+-- This library is free software; you can redistribute it and/or modify it
+-- under the terms of the MIT license. See LICENSE for details.
+--
+
+local lume = require "lume"
+
+local lurker = { _version = "1.0.0" }
+
+
+local dir = love.filesystem.enumerate or love.filesystem.getDirectoryItems
+local isdir = love.filesystem.isDirectory
+local time = love.timer.getTime or os.time
+local lastmodified = love.filesystem.getLastModified
+
+
+function lurker.init()
+  lurker.print("Initing lurker")
+  lurker.path = "."
+  lurker.preswap = function() end
+  lurker.postswap = function() end
+  lurker.interval = .5
+  lurker.last = 0
+  lurker.files = {}
+  lume.each(lurker.getchanged(), lurker.resetfile)
+  return lurker
+end
+
+
+function lurker.print(...)
+  print("[lurker] " .. lume.format(...))
+end
+
+
+function lurker.listdir(path, recursive, skipdotfiles)
+  path = (path == ".") and "" or path
+  local function fullpath(x) return path .. "/" .. x end
+  local t = {}
+  for _, f in pairs(lume.map(dir(path), fullpath)) do
+    if not skipdotfiles or not f:match("/%.[^/]*$") then
+      if recursive and isdir(f) then
+        lume.merge(t, lurker.listdir(f, true, true))
+      else
+        table.insert(t, lume.trim(f, "/"))
+      end
+    end
+  end
+  return t
+end
+
+
+function lurker.update() 
+  local diff = time() - lurker.last 
+  if diff > lurker.interval then
+    lurker.last = lurker.last + diff
+    lurker.scan()
+  end
+end
+
+
+function lurker.getchanged()
+  local function fn(f)
+    return f:match("%.lua$") and lurker.files[f] ~= lastmodified(f)
+  end
+  return lume.filter(lurker.listdir(lurker.path, true, true), fn)
+end
+
+
+function lurker.modname(f)
+  return (f:gsub("%.lua$", ""):gsub("[/\\]", "."))
+end
+
+
+function lurker.resetfile(f)
+  lurker.files[f] = lastmodified(f)
+end
+
+
+function lurker.scan()
+  for _, f in pairs(lurker.getchanged()) do
+    lurker.print("Hotswapping '{f}'...", {f = f})
+    lurker.preswap(f)
+    local modname = lurker.modname(f)
+    local t, ok, err = lume.time(lume.hotswap, modname)
+    if ok then
+      lurker.print("Swapped '{f}' in {t} secs", {f = f, t = t})
+    else 
+      lurker.print("Failed to swap '{f}' : {e}", {f = f, e = err})
+    end
+    lurker.resetfile(f)
+    lurker.postswap(f)
+  end
+end
+
+
+return lurker.init()