OC-PsychOS2/module/loadfile.lua

35 lines
1.4 KiB
Lua

function loadfile(p) -- string -- function -- reads file *p* and returns a function if possible
local f = io.open(p,"rb")
local c = f:read("*a")
f:close()
return load(c,p,"t")
end
function runfile(p,...) -- string -- -- runs file *p* with arbitrary arguments in the current thread
return loadfile(p)(...)
end
function os.spawnfile(p,n,...) -- string string -- number -- spawns a new process from file *p* with name *n*, with arguments following *n*.
local tA = {...}
return os.spawn(function() local res={pcall(loadfile(p), table.unpack(tA))} computer.pushSignal("process_finished", os.pid(), table.unpack(res)) dprint(table.concat(res)) end,n or p)
end
_G.package = {}
package.loaded = {computer=computer,component=component,fs=fs,buffer=buffer}
function require(f,force) -- string boolean -- table -- searches for a library with name *f* and returns what the library returns, if possible. if *force* is set, loads the library even if it is cached
if not package.loaded[f] or force then
local lib = os.getenv("LIB") or "/boot/lib\n/pkg/lib"
for d in lib:gmatch("[^\n]+") do
if fs.exists(d.."/"..f) then
package.loaded[f] = runfile(d.."/"..f)
elseif fs.exists(d.."/"..f..".lua") then
package.loaded[f] = runfile(d.."/"..f..".lua")
end
end
end
if package.loaded[f] then
return package.loaded[f]
end
error("library not found: "..f)
end
function reload(f) -- string -- table -- Reloads library *f* from disk into memory.
return require(f,true)
end