1 files changed, 154 insertions, 0 deletions
diff --git a/src/ctor.h b/src/ctor.h
new file mode 100644
index 0000000..96e1115
--- /dev/null
+++ b/src/ctor.h
@@ -0,0 +1,154 @@
+// -*- c++ -*-
+// Distributed under the BSD 2-Clause License.
+// See accompanying file LICENSE for details.
+#pragma once
+
+#include <source_location>
+#include <string>
+#include <vector>
+#include <map>
+#include <variant>
+#include <cstddef>
+#include <functional>
+
+enum class TargetType
+{
+	Auto, // Default - deduce from target name and sources extensions
+
+	Executable,
+	StaticLibrary,
+	DynamicLibrary,
+	Object,
+	UnitTest,
+	UnitTestLib,
+	Function,
+};
+
+enum class Language
+{
+	Auto, // Default - deduce language from source extensions
+
+	C,
+	Cpp,
+	Asm,
+};
+
+enum class OutputSystem
+{
+	Host, // Output for the target system
+	Build, // Internal tool during cross-compilation
+};
+
+struct Source
+{
+	Source(const char* file) : file(file) {}
+	Source(const std::string& file) : file(file) {}
+	Source(const char* file, Language lang) : file(file), language(lang) {}
+	Source(const std::string& file, Language lang) : file(file), language(lang) {}
+
+	Source(const char* file, const char* output) : file(file), output(output) {}
+	Source(const std::string& file, const std::string& output) : file(file), output(output) {}
+	Source(const char* file, Language lang, const char* output) : file(file), language(lang), output(output) {}
+	Source(const std::string& file, Language lang, const std::string& output) : file(file), language(lang), output(output) {}
+
+	std::string file;
+	Language language{Language::Auto};
+	std::string output{};
+};
+
+struct Flags
+{
+	std::vector<std::string> cxxflags; // flags for c++ compiler
+	std::vector<std::string> cflags; // flags for c compiler
+	std::vector<std::string> ldflags; // flags for linker
+	std::vector<std::string> asmflags; // flags for asm translator
+};
+
+struct Settings
+{
+	std::string builddir{"build"};
+	std::size_t parallel_processes{1};
+	int verbose{0}; // -1: completely silent, 0: normal, 1: verbose, ...
+};
+
+struct BuildConfiguration;
+using GeneratorCb = std::function<int(const std::string& input,
+                                      const std::string& output,
+                                      const BuildConfiguration& config,
+                                      const Settings& settings)>;
+
+struct BuildConfiguration
+{
+	std::string name; // Name - used for referring in other configurations.
+	TargetType type{TargetType::Auto};
+	OutputSystem system{OutputSystem::Host};
+	std::string target; // Output target file for this configuration
+	std::vector<Source> sources; // source list
+	std::vector<std::string> depends; // internal target dependencies
+	Flags flags;
+	std::vector<std::string> externals; // externals used by this configuration
+	GeneratorCb function;
+};
+
+using BuildConfigurations = std::vector<BuildConfiguration>;
+
+int reg(BuildConfigurations (*cb)(const Settings&),
+        const std::source_location location = std::source_location::current());
+
+// This type will use flags verbatim
+struct ExternalManual
+{
+	Flags flags;
+};
+
+
+struct ExternalConfiguration
+{
+	std::string name; // Name for configuration
+	OutputSystem system{OutputSystem::Host};
+	std::variant<ExternalManual> external;
+};
+
+using ExternalConfigurations = std::vector<ExternalConfiguration>;
+
+int reg(ExternalConfigurations (*cb)(const Settings&),
+        const std::source_location location = std::source_location::current());
+
+// Convenience macro - ugly but keeps things simple(r)
+#define CONCAT(a, b) CONCAT_INNER(a, b)
+#define CONCAT_INNER(a, b) a ## b
+#define UNIQUE_NAME(base) CONCAT(base, __LINE__)
+#define REG(cb) namespace { int UNIQUE_NAME(unique) = reg(cb); }
+
+// Predefined configuration keys
+namespace cfg
+{
+constexpr auto builddir = "builddir";
+
+constexpr auto host_cc = "host-cc";
+constexpr auto host_cxx = "host-cpp";
+constexpr auto host_ar = "host-ar";
+constexpr auto host_ld = "host-ld";
+
+constexpr auto build_cc = "build-cc";
+constexpr auto build_cxx = "build-cpp";
+constexpr auto build_ar = "build-ar";
+constexpr auto build_ld = "build-ld";
+
+constexpr auto ctor_includedir = "ctor-includedir";
+constexpr auto ctor_libdir = "ctor-libdir";
+}
+
+struct Configuration
+{
+	std::vector<std::string> args; // vector of arguments used when last calling configure
+	std::map<std::string, std::string> env; // env used when last calling configure
+
+	std::map<std::string, std::string> tools; // tools
+	std::map<std::string, Flags> externals;
+};
+
+const Configuration& configuration();
+bool hasConfiguration(const std::string& key);
+const std::string& getConfiguration(const std::string& key,
+                                    const std::string& defaultValue = {});