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-rw-r--r--luaotfload-override.lua77
1 files changed, 70 insertions, 7 deletions
diff --git a/luaotfload-override.lua b/luaotfload-override.lua
index 225ac68..39cc172 100644
--- a/luaotfload-override.lua
+++ b/luaotfload-override.lua
@@ -15,17 +15,23 @@ because we lack a user interface to toggle per-subsystem tracing.
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 texio_write_nl = texio.write_nl
-local texio_write = texio.write
-local iowrite = io.write
-
--[[doc--
We recreate the verbosity levels previously implemented in font-nms:
@@ -62,9 +68,67 @@ logs.getloglevel = get_loglevel
logs.get_loglevel = get_loglevel
logs.get_log_level = get_loglevel
-local set_logout = function (s)
+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 = "term"
+ elseif s == "file" then --- inject custom logger
+ 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
+ return finalizers
--else --- remains “log”
end
end
@@ -92,7 +156,6 @@ end
io.stdout:setvbuf "no"
io.stderr:setvbuf "no"
-local writeln
if tex and (tex.jobname or tex.formatname) then
--- TeX
writeln = texiowrite_nl
@@ -155,7 +218,7 @@ local names_report = function (mode, lvl, ...)
if loglevel >= lvl then
if mode == "log" then
log (...)
- elseif mode == "both" then
+ elseif mode == "both" and log ~= "stdout" then
log (...)
stdout (...)
else