This patch modifies logic for setting next_update_time such that the
update is done at full update_interval seconds. That is, for example
with update_interval 60.0, update is done at 00:00:00, 00:01:00,
00:02:00, etc.
This might be useful for using conky as a clock widget which only needs
to be updated once per minute, but is obliged to update exactly at
minute change.
It is implemented in a way that is (hopefully) immune to clockchanges
(as for example by NTP or DST).
The main purpose of this commit is to ensure that exec callbacks are
registered at startup (or config reload), so that they have a chance to
run on the first update interval. Much of the code in exec.cc got
consolidated, making it easier to follow. Several checks for NULL
pointers should eliminate some obscure segfaults I noticed, as well.
During the refactoring, I implemented height and width arguments for
execbar and execgauge. The functionality was already there, but wasn't
being used. All this is accompanied by updates to the man page and
plenty of code comments.
The cairo/imlib2/rsvg bindings require tolua++ [1], which is currently only
compatible with Lua 5.1 or earlier. We need to force Conky to compile against
Lua 5.1 if the user chooses to build the bindings.
This commit adds a separate pkg_search_module command specifically for Lua 5.1,
along with a note in the documentation. The original pkg_search_module command
was updated to include (and prefer) Lua 5.3+. Also, I threw in two other minor
random fixes to the docs while I was at it.
[1] https://github.com/LuaDist/toluapp
e.g. in the beginning the scale is always 0, leading to NaN and a crash
fixes the "show_graph_scale" not working bug, not yet reported (even though I actually noticed that before, didn't seem to bother me)
also cpugauge works again because fo this BUILD_MATH MATH problem
Per disucssion with arclance in #166, the call to check_include_file has
been migrated back to check_include_files and the required define set in
CMAKE_REQUIRED_DEFINITIONS. This properly removes the dependancy on
the check_include_file module. Third time is a charm!
One of the check_include_file checks in ConkyPlatformChecks should
not have been changed to check_include_files because the latter
takes 2 arguments and this call gives 3 (and doens't work right
without the third).
Fixes #162 by changing CheckInlcudeFile to
CheckIncludeFiles so that CMake can correctly include
the module. Change calls to check_include_file to
check_include_files.
I ran cppcheck on a whim while trying to debug #103 and it found these possible
memory corruptions. They all seem to be buffers that were made one byte too
small (leaving out the byte for the C-string null terminator).
