raze-gles/polymer/eduke32/source/lunatic/foreachmap.lua
helixhorned 3697842bc5 Add ART loader for the LuaJIT BUILD struct loader module, 2 more examples.
The map iterator now has init/finish capability, making it possible to
write scripts that aggregate data over multiple map files.  One such example
calculates some statistics, the other loads art metadata and looks for
red walls with non-pow2 ysize tiles.

git-svn-id: https://svn.eduke32.com/eduke32@2814 1a8010ca-5511-0410-912e-c29ae57300e0
2012-07-08 21:47:11 +00:00

54 lines
1.5 KiB
Lua
Executable file

#!/usr/local/bin/luajit
-- Generic map iterator.
-- The first cmdline arg is a name of a lua file (may be sans .lua) which must
-- be a module and is `require'd into this script, e.g. "stats" or "stats.lua".
-- First, a key named .init is looked up in the loaded module and if it exists,
-- it is run like .init(arg) (thus allowing it to parse the command-line
-- arguments and then potentially remove the ones it used).
-- If .init returns non-nil, this script aborts.
-- Otherwise, for each 2nd and following argument, if map loading succeeds,
-- .success(map, filename) is run, otherwise
-- .failure(filename, errmsg) is run if that key exists, or a standard error
-- message is printed to stderr.
-- Finally, if there is a .finish field in the module, it is run with no args.
local B = require "build"
local string = require "string"
local io = require "io"
local os = require "os"
if (#arg < 1) then
io.stdout:write("Usage: luajit ./foreachmap <module[.lua]> [init args...] <filename.map> ...\n\n")
return
end
local modname = string.gsub(arg[1], "%.lua$", "")
local mod = require(modname)
if (mod.init) then
if (mod.init(arg) ~= nil) then
os.exit(1)
end
end
for i=2,#arg do
local fn = arg[i]
local map, errmsg = B.loadboard(fn)
if (map ~= nil) then
mod.success(map, fn)
else
if (mod.failure) then
mod.failure(fn, errmsg)
else
io.stderr:write(string.format("--- %s: %s\n", fn, errmsg))
end
end
end
if (mod.finish) then
mod.finish()
end