1 files changed, 54 insertions, 0 deletions
diff --git a/src/rebuild.cc b/src/rebuild.cc
index c1f2a4a..3492955 100644
--- a/src/rebuild.cc
+++ b/src/rebuild.cc
@@ -55,9 +55,48 @@ int unreg(const char* location)
 		}
 	}
 
+	for(std::size_t i = 0; i < numExternalConfigFiles;)
+	{
+		if(std::string(location) == externalConfigFiles[i].file)
+		{
+			++found;
+			for(std::size_t j = i; j < numExternalConfigFiles; ++j)
+			{
+				externalConfigFiles[j] = externalConfigFiles[j + 1];
+			}
+			--numExternalConfigFiles;
+		}
+		else
+		{
+			++i;
+		}
+	}
+
 	return found;
 }
 
+std::array<ExternalConfigurationEntry, 1024> externalConfigFiles;
+std::size_t numExternalConfigFiles{0};
+
+// TODO: Use c++20 when ready, somehing like this:
+//int reg(const std::source_location location = std::source_location::current())
+int reg(const char* location, std::vector<ExternalConfiguration> (*cb)())
+{
+	// NOTE: std::cout cannot be used here
+	if(numExternalConfigFiles >= externalConfigFiles.size())
+	{
+		fprintf(stderr, "Max %d external configurations currently supported.\n",
+		        (int)externalConfigFiles.size());
+		exit(1);
+	}
+
+	externalConfigFiles[numExternalConfigFiles].file = location;
+	externalConfigFiles[numExternalConfigFiles].cb = cb;
+	++numExternalConfigFiles;
+
+	return 0;
+}
+
 namespace
 {
 bool contains(const std::vector<Source>& sources, const std::string& file)
@@ -130,6 +169,21 @@ void recompileCheck(const Settings& global_settings, int argc, char* argv[],
 		}
 	}
 
+	for(std::size_t i = 0; i < numExternalConfigFiles; ++i)
+	{
+		std::string location = externalConfigFiles[i].file;
+		if(global_settings.verbose > 1)
+		{
+			std::cout << " - " << location << "\n";
+		}
+
+		// Ensure that files containing multiple configurations are only added once.
+		if(!contains(config.sources, location))
+		{
+			config.sources.push_back(location);
+		}
+	}
+
 	auto tasks = taskFactory({config}, settings, {});
 
 	for(auto task : tasks)