local format = os.selfname -- or os.selfcore, I couldn't find a difference yet local ourname = arg[0] -- This might not be os.selfarg[0] -- We want to drop arg[0] aka. ourname from the arguments to avoid recursion if os.selfarg[0] == ourname then ourname = nil end local run local arg_pattern, late_arg_pattern do local l = lpeg or require'lpeg' -- We intepret two arguments directly local early_args = 'run' * l.Cmt(l.P'=' + -1, function() run = true return true end) + 'progname=' * l.Cmt(0, function(s, off) format = s:sub(off) return true end) -- LuaMetaTeX needs -- to introduce parameters, -- but fmtutil uses just -. Let's rewrite this on the fly: local maybe_option = ('-' * ('-' + l.Cc'-') * #(early_args^-1))^-1 local quote = l.Cc(os.type == 'windows' and '"' or "'") local escape if os.type == 'windows' then -- Windows: " -> "^"" The ^ is for cmd escaping, the """ is for command line splitting escaping, -- backslashes still have to be escaped, but only in front of " or \ -- Additionally, "%" always as to be escaped for some variable substitution -- pass before everything else. -- WARNING: This works with luametatex's argument splitting, but don't generally rely -- on it for other Windows programs. There are two standard Windows ways which are incompatible... escape = '\\' * #l.S'\\"' * l.Cc'\\' + '"' * l.Cc'^""' + '%' * l.Cc'%' + 1 else -- POSIX: We escape with single quotes, so only single quotes need escaping escape = "'" * l.Cc"\\''" + 1 end arg_pattern = l.Cs(l.Cc' ' * maybe_option * quote * escape^0 * quote) late_arg_pattern = l.Cs(l.Cc' ' * quote * escape^0 * quote) end for i, a in ipairs(os.selfarg) do if a == ourname then -- Avoid recursion table.remove(os.selfarg, i) ourname = nil a = os.selfarg[i] end if a == "--" then arg_pattern = late_arg_pattern end -- This convention is not respected by luametatex itself os.selfarg[i] = arg_pattern:match(a) end os.setenv("engine", status.luatex_engine) local kpse_call = io.popen(string.format("kpsewhich -progname%s -format lua -all -must-exist%s-init.lua", late_arg_pattern:match(format), late_arg_pattern:match(format))) local file repeat file = kpse_call:read() until not assert(file, "Unable to find initialization script. Aborting."):match('^%.') if not kpse_call:close() then error(file) end local geterrorcode if os.type == 'windows' then function geterrorcode(ec) return ec end else function geterrorcode(ec) return ec & 0xFF == 0 and ec >> 8 or 0xFF end end local firstargs = string.format("luametatex --permitloadlib%s%s", late_arg_pattern:match('--lua=' .. file), late_arg_pattern:match('--arg0=' .. os.selfarg[0])) local args = table.concat(os.selfarg) if run then -- The user wants to take care of everything os.exit(geterrorcode(os.execute(firstargs .. args))) else for i = 1, 5 do local status = geterrorcode(os.execute(string.format("%s --run=%i%s", firstargs, i, args))) if status ~= 75 then os.exit(status) end end os.exit(75) end