Support building modular programs

[builder.git] / source / config.cpp

diff --git a/source/config.cpp b/source/config.cpp
index 50e0de9f9a165bfd9e461c6d8a194e1a756c316c..36a59638f104506a9bf6adaca70ab0d8b2ddd57f 100644 (file)
--- a/source/config.cpp
+++ b/source/config.cpp
@@ -1,14 +1,28 @@
+#include <fstream>
 #include <msp/error.h>
+#include <msp/path/utils.h>
+#include <msp/time/utils.h>
 #include "config.h"
 
 using namespace std;
 using namespace Msp;
 
+/**
+Adds a configuration option.
+
+@param   n  Option name
+@param   v  Default value
+@param   d  Description
+*/
 void Config::add_option(const string &n, const string &v, const string &d)
 {
        options.insert(OptionMap::value_type(n, Option(n, v, d)));
 }
 
+/**
+Gets the given option from the configuration.  If the option doesn't exist,
+an Exception is thrown.
+*/
 const Config::Option &Config::get_option(const string &name) const
 {
        OptionMap::const_iterator i=options.find(name);
@@ -18,31 +32,135 @@ const Config::Option &Config::get_option(const string &name) const
        return i->second;
 }
 
+/**
+Checks whether an option with the given name exists.
+*/
 bool Config::is_option(const string &name) const
 {
        return options.count(name);
 }
 
-bool Config::process(const RawOptionMap &opts)
+/**
+Selects the last profile used.  If the profile cache file is not present, the
+default profile is assumed.
+*/
+void Config::select_last_profile()
+{
+       ifstream in((source/".profile.cache").str().c_str());
+       if(in)
+       {
+               string profile;
+               in>>profile;
+               set_option("profile", profile);
+       }
+       else
+               set_option("profile", "default");
+
+       load();
+}
+
+/**
+Selects the given profile.  The profile cache file is updated as well.
+*/
+void Config::select_profile(const string &profile)
+{
+       set_option("profile", profile);
+
+       ofstream out((source/".profile.cache").str().c_str());
+       if(out)
+               out<<profile<<'\n';
+
+       load();
+}
+
+/**
+Processes options from the given raw option map.  Nonexistent options are
+ignored.  If any options were changed, the mtime of the configuration is updated
+to the current time.
+
+@param   opts  A map to process options from
+
+@return  Whether any option values were changed
+*/
+bool Config::update(const RawOptionMap &opts)
 {
        bool changed=false;
        for(RawOptionMap::const_iterator i=opts.begin(); i!=opts.end(); ++i)
        {
-               OptionMap::iterator j=options.find(i->first);
-               if(j!=options.end())
-               {
-                       if(i->second!=j->second.value)
-                               changed=true;
-                       j->second.value=i->second;
-               }
+               if(set_option(i->first, i->second) && i->first!="profile")
+                       changed=true;
        }
 
+       if(changed)
+               mtime=Time::now();
+
        return changed;
 }
 
+void Config::save() const
+{
+       Path::Path fn=source/".options.cache";
+
+       OptionMap::const_iterator i=options.find("profile");
+       if(i!=options.end())
+               fn=source/(".options."+i->second.value+".cache");
+
+       ofstream out(fn.str().c_str());
+       if(!out) return;
+       
+       for(i=options.begin(); i!=options.end(); ++i)
+               out<<"option \""<<i->second.name<<"\" \""<<i->second.value<<"\";\n";
+}
+
+bool Config::set_option(const string &opt, const string &val)
+{
+       bool result=false;
+
+       OptionMap::iterator i=options.find(opt);
+       if(i!=options.end())
+       {
+               if(i->second.value!=val)
+                       result=true;
+               i->second.value=val;
+       }
+
+       return result;
+}
+
+void Config::load()
+{
+       Path::Path fn=source/".options.cache";
+
+       OptionMap::iterator i=options.find("profile");
+       if(i!=options.end())
+               fn=source/(".options."+i->second.value+".cache");
+
+       ifstream in(fn.str().c_str());
+       if(!in) return;
+
+       struct stat st;
+       Path::stat(fn, st);
+       mtime=Time::TimeStamp::from_unixtime(st.st_mtime);
+
+       Parser::Parser parser(in, fn.str());
+       Loader loader(*this);
+       loader.load(parser);
+}
+
 Config::Option::Option(const string &n, const string &v, const string &d):
        name(n),
        defv(v),
        descr(d),
        value(v)
 { }
+
+Config::Loader::Loader(Config &c):
+       conf(c)
+{
+       add("option", &Loader::option);
+}
+
+void Config::Loader::option(const string &n, const string &v)
+{
+       conf.set_option(n, v);
+}