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|
if not modules then modules = { } end modules ['luat-ovr'] = {
version = "2.3a",
comment = "companion to luatex-*.tex",
author = "Khaled Hosny, Elie Roux, Philipp Gesang",
copyright = "Luaotfload Development Team",
license = "GNU GPL v2"
}
--[[doc--
The logging system is slow in general, as we always have the function
call overhead even if we aren’t going to output anything. On the other
hand, the more efficient approach followed by Context isn’t an option
because we lack a user interface to toggle per-subsystem tracing.
--doc]]--
local module_name = "luaotfload"
local ioopen = io.open
local iowrite = io.write
local lfsisdir = lfs.isdir
local lfsisfile = lfs.isfile
local md5sumhexa = md5.sumhexa
local osdate = os.date
local ostime = os.time
local select = select
local stringformat = string.format
local stringsub = string.sub
local tableconcat = table.concat
local texio_write_nl = texio.write_nl
local texiowrite_nl = texio.write_nl
local texio_write = texio.write
local texiowrite = texio.write
local type = type
local texjob = false
if tex and (tex.jobname or tex.formatname) then
--- TeX
texjob = true
end
--[[doc--
We recreate the verbosity levels previously implemented in font-nms:
==========================================================
lvl arg trace_loading trace_search suppress_output
----------------------------------------------------------
(0) -> -q ⊥ ⊥ ⊤
(1) -> ∅ ⊥ ⊥ ⊥
(2) -> -v ⊤ ⊥ ⊥
(>2) -> -vv ⊤ ⊤ ⊥
==========================================================
--doc]]--
local loglevel = 1 --- default
local logout = "log"
--- int -> bool
local set_loglevel = function (n)
if type(n) == "number" then
loglevel = n
end
return true
end
logs.setloglevel = set_loglevel
logs.set_loglevel = set_loglevel
logs.set_log_level = set_loglevel --- accomodating lazy typists
--- unit -> int
local get_loglevel = function ( )
return loglevel
end
logs.getloglevel = get_loglevel
logs.get_loglevel = get_loglevel
logs.get_log_level = get_loglevel
local writeln --- scope so we can change it
local log_msg = [[
logging output redirected to %s
to monitor the progress run "tail -f %s" in another terminal
]]
local tmppath = os.getenv "TMPDIR" or "/tmp"
local choose_logfile = function ( )
if lfsisdir (tmppath) then
local fname
repeat --- ensure that file of that name doesn’t exist
fname = tmppath .. "/luaotfload-log-"
.. stringsub (md5sumhexa (ostime ()), 1, 8)
until not lfsisfile (fname)
iowrite (stringformat (log_msg, fname, fname))
return ioopen (fname, "w")
end
--- missing /tmp
return false
end
local set_logout = function (s, finalizers)
if s == "stdout" then
logout = "redirect"
elseif s == "file" then --- inject custom logger
logout = "redirect"
local chan = choose_logfile ()
chan:write (stringformat ("logging initiated at %s",
osdate ("%F %T", ostime ())))
local writefile = function (...)
if select ("#", ...) == 2 then
chan:write (select (2, ...))
else
chan:write (select (1, ...))
end
end
local writefile_nl= function (...)
chan:write "\n"
if select ("#", ...) == 2 then
chan:write (select (2, ...))
else
chan:write (select (1, ...))
end
end
local writeln_orig = writeln
texiowrite = writefile
texiowrite_nl = writefile_nl
writeln = writefile_nl
finalizers[#finalizers+1] = function ()
chan:write (stringformat ("\nlogging finished at %s\n",
osdate ("%F %T", ostime ())))
chan:close ()
texiowrite = texio.write
texiowrite_nl = texio.write_nl
writeln = writeln_orig
end
--else --- remains “log”
end
return finalizers
end
logs.set_logout = set_logout
local log = function (category, fmt, ...)
local res = { module_name, "|", category, ":" }
if fmt then
res [#res + 1] = stringformat (fmt, ...)
end
texiowrite_nl (logout, tableconcat(res, " "))
end
--- with faux db update with maximum verbosity:
---
--- --------- --------
--- buffering time (s)
--- --------- --------
--- full 4.12
--- line 4.20
--- none 4.39
--- --------- --------
---
io.stdout:setvbuf "no"
io.stderr:setvbuf "no"
if texjob == true then
writeln = function (str)
texiowrite_nl ("term", str)
end
else
writeln = function (str)
iowrite(str)
iowrite "\n"
end
end
stdout = function (category, ...)
local res = { module_name, "|", category, ":" }
local nargs = select("#", ...)
if nargs == 0 then
--writeln tableconcat(res, " ")
--return
elseif nargs == 1 then
res[#res+1] = select(1, ...) -- around 30% faster than unpack()
else
res[#res+1] = stringformat(...)
end
writeln(tableconcat(res, " "))
end
--- at default (zero), we aim to be quiet
local level_ids = { common = 1, loading = 2, search = 3 }
--[[doc--
The names_report logger is used more or less all over luaotfload.
Its requirements are twofold:
1) Provide two logging channels, the terminal and the log file;
2) Allow for control over verbosity levels.
The first part is addressed by specifying the log *mode* as the
first argument that can be either “log”, meaning the log file, or
“both”: log file and stdout. Anything else is taken as referring to
stdout only.
Verbosity levels, though not as fine-grained as e.g. Context’s
system of tracers, allow keeping the logging spam caused by
different subsystems manageable. By default, luaotfload will not
emit anything if things are running smoothly on level zero. Only
warning messages are relayed, while the other messages are skipped
over. (This is a little sub-optimal performance-wise since the
function calls to the logger are executed regardless.) The log
level during a Luatex run can be adjusted by setting the “loglevel”
field in config.luaotfload, or by calling logs.set_loglevel() as
defined above.
--doc]]--
local names_report = function (mode, lvl, ...)
if type(lvl) == "string" then
lvl = level_ids[lvl]
end
if not lvl then lvl = 0 end
if loglevel >= lvl then
if mode == "log" then
log (...)
elseif mode == "both" and logout ~= "redirect" then
log (...)
stdout (...)
else
stdout (...)
end
end
end
logs.names_report = names_report
--[[doc--
The fontloader comes with the Context logging mechanisms
inaccessible. Instead, it provides dumb fallbacks based
on the functions in texio.write*() that can be overridden
by providing a function texio.reporter().
The fontloader output can be quite verbose, so we disable
it entirely by default.
--doc]]--
local texioreporter = function (message)
names_report("log", 2, message)
end
texio.reporter = texioreporter
--[[doc--
Adobe Glyph List.
-------------------------------------------------------------------
Context provides a somewhat different font-age.lua from an unclear
origin. Unfortunately, the file name it reads from is hard-coded
in font-enc.lua, so we have to replace the entire table.
This shouldn’t cause any complications. Due to its implementation
the glyph list will be loaded upon loading a OTF or TTF for the
first time during a TeX run. (If one sticks to TFM/OFM then it is
never read at all.) For this reason we can install a metatable that
looks up the file of our choosing and only falls back to the
Context one in case it cannot be found.
--doc]]--
if fonts then --- need to be running TeX
if next(fonts.encodings.agl) then
print(next, fonts.encodings.agl)
--- unnecessary because the file shouldn’t be loaded at this time
--- but we’re just making sure
fonts.encodings.agl = nil
collectgarbage"collect"
end
fonts.encodings.agl = { }
setmetatable(fonts.encodings.agl, { __index = function (t, k)
if k == "unicodes" then
local glyphlist = resolvers.findfile"luaotfload-glyphlist.lua"
if glyphlist then
names_report("log", 1, "load", "loading the Adobe glyph list")
else
glyphlist = resolvers.findfile"font-age.lua"
names_report("both", 0, "load",
"loading the extended glyph list from ConTeXt")
end
local unicodes = dofile(glyphlist)
fonts.encodings.agl = { unicodes = unicodes }
return unicodes
else
return nil
end
end })
end
-- vim:tw=71:sw=4:ts=4:expandtab
|