common, cal: rework debug printers

* prefix messages to indicate the debug level
* colorize when printing to terminal

This introduces a dependency on luaposix.

1 files changed, 3 insertions, 3 deletions

diff --git a/cal.lua b/cal.lua
index 3a5c509..0cd97b5 100644
--- a/cal.lua
+++ b/cal.lua
@@ -224,7 +224,7 @@ local parse_calendar_lines do
   --]]--
 
   local add_param = function (t, k, v)
-    debugln ("»»»» add_param ({%s}, %s, %s)", t, tostring (k), tostring (v))
+    debugln ("add_param ({%s}, %s, %s)", t, tostring (k), tostring (v))
 
     t [#t + 1] = { name = k, value = v }
 
@@ -279,7 +279,7 @@ local parse_calendar_lines do
     if ok == false then
       pos1 = skip_line (raw, pos0)
       if pos0 == pos1 then
-        noiseln ("»»» [%d] reached EOF, terminating after %d bytes, \z
+        noiseln ("[%d] reached EOF, terminating after %d bytes, \z
                   %d calendar lines",
                  pos0, consumed, nline)
         return acc
@@ -287,7 +287,7 @@ local parse_calendar_lines do
       errorln ("[%d–%d] %d bad content line; skipping", pos0, pos1, nline)
       nskipped = nskipped + 1
     else
-      noiseln ("»»» [%d–%d] “%s” [%s] “%s”",
+      noiseln ("[%d–%d] “%s” [%s] “%s”",
                pos0, pos1, name, fmt_calendar_params (params), value)
       acc [#acc + 1] = { pos = { pos0, pos1 }
                        , name = name, params = params, value = value }