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|
----------------------------------------------------------------------
-- sys - a package that provides simple system (unix) tools
----------------------------------------------------------------------
local os = require 'os'
local io = require 'io'
local paths = require 'paths'
sys = {}
--------------------------------------------------------------------------------
-- load all functions from lib
--------------------------------------------------------------------------------
local _lib = require 'libsys'
for k,v in pairs(_lib) do
sys[k] = v
end
--------------------------------------------------------------------------------
-- tic/toc (matlab-like) timers
--------------------------------------------------------------------------------
local __t__
function sys.tic()
__t__ = sys.clock()
end
function sys.toc(verbose)
local __dt__ = sys.clock() - __t__
if verbose then print(__dt__) end
return __dt__
end
--------------------------------------------------------------------------------
-- execute an OS command, but retrieves the result in a string
--------------------------------------------------------------------------------
local function execute(cmd)
local cmd = cmd .. ' 2>&1'
local f = io.popen(cmd)
local s = f:read('*all')
f:close()
s = s:gsub('^%s*',''):gsub('%s*$','')
return s
end
sys.execute = execute
--------------------------------------------------------------------------------
-- execute an OS command, but retrieves the result in a string
-- side effect: file in /tmp
-- this call is typically more robust than the one above (on some systems)
--------------------------------------------------------------------------------
function sys.fexecute(cmd, readwhat)
readwhat = readwhat or '*all'
local tmpfile = os.tmpname()
local cmd = cmd .. ' >'.. tmpfile..' 2>&1'
os.execute(cmd)
local file = _G.assert(io.open(tmpfile))
local s= file:read(readwhat)
file:close()
s = s:gsub('^%s*',''):gsub('%s*$','')
os.remove(tmpfile)
return s
end
--------------------------------------------------------------------------------
-- returns the name of the OS in use
-- warning, this method is extremely dumb, and should be replaced by something
-- more reliable
--------------------------------------------------------------------------------
function sys.uname()
if paths.dirp('C:\\') then
return 'windows'
else
local ffi = require 'ffi'
local os = ffi.os
if os:find('Linux') then
return 'linux'
elseif os:find('OSX') then
return 'macos'
else
return '?'
end
end
end
sys.OS = sys.uname()
--------------------------------------------------------------------------------
-- ls (list dir)
--------------------------------------------------------------------------------
sys.ls = function(d) d = d or ' ' return execute('ls ' ..d) end
sys.ll = function(d) d = d or ' ' return execute('ls -l ' ..d) end
sys.la = function(d) d = d or ' ' return execute('ls -a ' ..d) end
sys.lla = function(d) d = d or ' ' return execute('ls -la '..d) end
--------------------------------------------------------------------------------
-- prefix
--------------------------------------------------------------------------------
local function find_prefix()
if arg then
for i, v in pairs(arg) do
if type(i) == "number" and type(v) == "string" and i <= 0 then
local lua_path = paths.basename(v)
if lua_path == "luajit" or lua_path == "lua" then
local bin_dir = paths.dirname(v)
if paths.basename(bin_dir) == "bin" then
return paths.dirname(bin_dir)
else
return bin_dir
end
end
end
end
end
return ""
end
sys.prefix = find_prefix()
--------------------------------------------------------------------------------
-- always returns the path of the file running
--------------------------------------------------------------------------------
sys.fpath = require 'sys.fpath'
--------------------------------------------------------------------------------
-- split string based on pattern pat
--------------------------------------------------------------------------------
function sys.split(str, pat)
local t = {} -- NOTE: use {n = 0} in Lua-5.0
local fpat = "(.-)" .. pat
local last_end = 1
local s, e, cap = str:find(fpat, last_end)
while s do
if s ~= 1 or cap ~= "" then
_G.table.insert(t,cap)
end
last_end = e+1
s, e, cap = str:find(fpat, last_end)
end
if last_end <= #str then
cap = str:sub(last_end)
_G.table.insert(t, cap)
end
return t
end
--------------------------------------------------------------------------------
-- check if a number is NaN
--------------------------------------------------------------------------------
function sys.isNaN(number)
-- We rely on the property that NaN is the only value that doesn't equal itself.
return (number ~= number)
end
--------------------------------------------------------------------------------
-- sleep
--------------------------------------------------------------------------------
function sys.sleep(seconds)
sys.usleep(seconds*1000000)
end
--------------------------------------------------------------------------------
-- colors, can be used to print things in color
--------------------------------------------------------------------------------
sys.COLORS = require 'sys.colors'
--------------------------------------------------------------------------------
-- backward compat
--------------------------------------------------------------------------------
sys.dirname = paths.dirname
sys.concat = paths.concat
return sys
|
