1 files changed, 64 insertions, 20 deletions
diff --git a/otfl-luat-ovr.lua b/otfl-luat-ovr.lua
index 63a9e19..bd04eeb 100644
--- a/otfl-luat-ovr.lua
+++ b/otfl-luat-ovr.lua
@@ -7,30 +7,74 @@ if not modules then modules = { } end modules ['luat-ovr'] = {
 }
 
 
-local write_nl, format, name = texio.write_nl, string.format, "luaotfload"
-local dummyfunction = function() end
+local module_name = "luaotfload"
 
-callbacks = {
-    register      = dummyfunction,
-}
+local texiowrite_nl = texio.write_nl
+local stringformat  = string.format
+local tableconcat   = table.concat
+local type          = type
+
+--[[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"
 
-function logs.report(category,fmt,...)
-    if fmt then
-        write_nl('log', format("%s | %s: %s",name,category,format(fmt,...)))
-    elseif category then
-        write_nl('log', format("%s | %s",name,category))
-    else
-        write_nl('log', format("%s |",name))
+local set_loglevel = function (n)
+    if type(n) == "number" then
+        loglevel = n
     end
 end
+logs.set_loglevel = set_loglevel
+
+local set_logout = function (s)
+    if s == "stdout" then
+        logout = "term"
+    --else --- remains “log”
+    end
+end
+
+logs.set_logout = set_logout
+
+local log = function (category, fmt, ...)
+    local res = { module_name, " |" }
+    if category then res[#res+1] = " " .. category end
+    if fmt      then res[#res+1] = ": " .. stringformat(fmt, ...) end
+    texiowrite_nl(logout, tableconcat(res))
+end
+
+local stdout = function (category, fmt, ...)
+    local res = { module_name, " |" }
+    if category then res[#res+1] = " " .. category end
+    if fmt      then res[#res+1] = ": " .. stringformat(fmt, ...) end
+    texiowrite_nl(tableconcat(res))
+end
 
-function logs.info(category,fmt,...)
-    if fmt then
-        write_nl(format("%s | %s: %s",name,category,format(fmt,...)))
-    elseif category then
-        write_nl(format("%s | %s",name,category))
-    else
-        write_nl(format("%s |",name))
+local level_ids = { common  = 0, loading = 1, search  = 2 }
+
+logs.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 (...)
+        else
+            stdout (...)
+        end
     end
-    io.flush()
 end
+
+-- vim:tw=71:sw=4:ts=4:expandtab