auto_profiles: add this script

This is taken from a somewhat older proof-of-concept script. The basic
idea, and most of the implementation, is still the same. The way the
profiles are actually defined changed.

I still feel bad about this being a Lua script, and running user
expressions as Lua code in a vaguely defined environment, but I guess as
far as balance of effort/maintenance/results goes, this is fine.

It's a bit bloated (the Lua scripting state is at least 150KB or so in
total), so in order to enable this by default, I decided it should
unload itself by default if no auto-profiles are used. (And currently,
it does not actually rescan the profile list if a new config file is
loaded some time later, so the script would do nothing anyway if no auto
profiles were defined.)

This still requires defining inverse profiles for "unapplying" a
profile. Also this is still somewhat racy. Both will probably be
alleviated to some degree in the future.

1 files changed, 3 insertions, 0 deletions

diff --git a/options/m_config_frontend.h b/options/m_config_frontend.h
index 19fbcadf25..81bc78b6e1 100644
--- a/options/m_config_frontend.h
+++ b/options/m_config_frontend.h
@@ -232,6 +232,9 @@ struct m_profile *m_config_add_profile(struct m_config *config, char *name);
  */
 void m_profile_set_desc(struct m_profile *p, bstr desc);
 
+// Set auto profile condition of a profile.
+void m_profile_set_cond(struct m_profile *p, bstr cond);
+
 /*  Add an option to a profile.
  *  Used by the config file parser when defining a profile.
  *