Move sources to ... well, src ;)

1 files changed, 301 insertions, 0 deletions

diff --git a/src/configure.cc b/src/configure.cc
new file mode 100644
index 0000000..ab2f837
--- /dev/null
+++ b/src/configure.cc
@@ -0,0 +1,301 @@
+#include "configure.h"
+
+#include <iostream>
+#include <filesystem>
+#include <fstream>
+
+#include <getoptpp/getoptpp.hpp>
+
+#include "settings.h"
+#include "execute.h"
+#include "libcppbuild.h"
+#include "tasks.h"
+
+std::filesystem::path configurationFile("configuration.cc");
+std::filesystem::path configHeaderFile("config.h");
+
+const std::map<std::string, std::string> default_configuration{};
+const std::map<std::string, std::string>& __attribute__((weak)) configuration()
+{
+	return default_configuration;
+}
+
+bool hasConfiguration(const std::string& key)
+{
+	const auto& c = configuration();
+	return c.find(key) != c.end();
+}
+
+const std::string& getConfiguration(const std::string& key,
+                                    const std::string& defaultValue)
+{
+	const auto& c = configuration();
+	if(hasConfiguration(key))
+	{
+		return c.at(key);
+	}
+
+	return defaultValue;
+}
+
+std::string locate(const std::string& arch, const std::string& app)
+{
+	std::string path_env = std::getenv("PATH");
+	std::cout << path_env << "\n";
+
+	std::string program = app;
+	if(!arch.empty())
+	{
+		program = arch + "-" + app;
+	}
+	std::cout << "Looking for: " << program << "\n";
+	std::vector<std::string> paths;
+
+	{
+		std::stringstream ss(path_env);
+		std::string path;
+		while (std::getline(ss, path, ':'))
+		{
+			paths.push_back(path);
+		}
+	}
+	for(const auto& path_str : paths)
+	{
+		std::filesystem::path path(path_str);
+		auto prog_path = path / program;
+		if(std::filesystem::exists(prog_path))
+		{
+			std::cout << "Found file " << app << " in path: " << path << "\n";
+			auto perms = std::filesystem::status(prog_path).permissions();
+			if((perms & std::filesystem::perms::owner_exec) != std::filesystem::perms::none)
+			{
+				std::cout << " - executable by owner\n";
+			}
+			if((perms & std::filesystem::perms::group_exec) != std::filesystem::perms::none)
+			{
+				std::cout << " - executable by group\n";
+			}
+			if((perms & std::filesystem::perms::others_exec) != std::filesystem::perms::none)
+			{
+				std::cout << " - executable by others\n";
+			}
+
+			return prog_path.string();
+		}
+	}
+
+	std::cerr << "Could not locate " << app << " for the " << arch << " architecture\n";
+	exit(1);
+	return {};
+}
+
+int configure(int argc, char* argv[])
+{
+	Settings settings;
+
+	settings.builddir = "build";
+
+	std::string cmd_str;
+	for(int i = 0; i < argc; ++i)
+	{
+		if(i > 0)
+		{
+			cmd_str += " ";
+		}
+		cmd_str += argv[i];
+	}
+
+	dg::Options opt;
+	int key{128};
+
+	std::string build_arch;
+	std::string build_path;
+	std::string host_arch;
+	std::string host_path;
+	std::string cc_prog = "gcc";
+	std::string cxx_prog = "g++";
+	std::string ar_prog = "ar";
+	std::string ld_prog = "ld";
+
+	opt.add("build-dir", required_argument, 'b',
+	        "Set output directory for build files (default: '" +
+	        settings.builddir + "').",
+	        [&]() {
+		        settings.builddir = optarg;
+		        return 0;
+	        });
+
+	opt.add("verbose", no_argument, 'v',
+	        "Be verbose. Add multiple times for more verbosity.",
+	        [&]() {
+		        settings.verbose++;
+		        return 0;
+	        });
+
+	opt.add("cc", required_argument, key++,
+	        "Use specified c-compiler instead of gcc.",
+	        [&]() {
+		        cc_prog = optarg;
+		        return 0;
+	        });
+
+	opt.add("cxx", required_argument, key++,
+	        "Use specified c++-compiler instead of g++.",
+	        [&]() {
+		        cxx_prog = optarg;
+		        return 0;
+	        });
+
+	opt.add("ar", required_argument, key++,
+	        "Use specified archiver instead of ar.",
+	        [&]() {
+		        ar_prog = optarg;
+		        return 0;
+	        });
+
+	opt.add("ld", required_argument, key++,
+	        "Use specified linker instead of ld.",
+	        [&]() {
+		        ld_prog = optarg;
+		        return 0;
+	        });
+
+	opt.add("build", required_argument, key++,
+	        "Configure for building on specified architecture.",
+	        [&]() {
+		        build_arch = optarg;
+		        return 0;
+	        });
+
+	opt.add("build-path", required_argument, key++,
+	        "Set path to build tool-chain.",
+	        [&]() {
+		        build_path = optarg;
+		        return 0;
+	        });
+
+	opt.add("host", required_argument, key++,
+	        "Cross-compile to build programs to run on specified architecture.",
+	        [&]() {
+		        host_arch = optarg;
+		        return 0;
+	        });
+
+	opt.add("host-path", required_argument, key++,
+	        "Set path to cross-compile tool-chain.",
+	        [&]() {
+		        host_path = optarg;
+		        return 0;
+	        });
+
+	opt.add("help", no_argument, 'h',
+	        "Print this help text.",
+	        [&]() {
+		        std::cout << "configure usage stuff\n";
+		        opt.help();
+		        exit(0);
+		        return 0;
+	        });
+
+	opt.process(argc, argv);
+
+	if(host_arch.empty())
+	{
+		host_arch = build_arch;
+	}
+
+	auto tasks = getTasks(settings);
+/*
+	bool needs_cpp{false};
+	bool needs_c{false};
+	bool needs_ar{false};
+	bool needs_asm{false};
+	for(const auto& task :tasks)
+	{
+		switch(task->sourceLanguage())
+		{
+		case Language::Auto:
+			std::cerr << "TargetLanguage not deduced!\n";
+			exit(1);
+			break;
+		case Language::C:
+			needs_cpp = false;
+			break;
+		case Language::Cpp:
+			needs_c = true;
+			break;
+		case Language::Asm:
+			needs_asm = true;
+			break;
+		}
+	}
+*/
+	auto cc_env = getenv("CC");
+	if(cc_env)
+	{
+		cmd_str = std::string("CC=") + cc_env + " " + cmd_str;
+		cc_prog = cc_env;
+	}
+
+	auto cxx_env = getenv("CXX");
+	if(cxx_env)
+	{
+		cmd_str = std::string("CXX=") + cxx_env + " " + cmd_str;
+		cxx_prog = cxx_env;
+	}
+
+	auto ar_env = getenv("AR");
+	if(ar_env)
+	{
+		cmd_str = std::string("AR=") + ar_env + " " + cmd_str;
+		ar_prog = ar_env;
+	}
+
+	auto ld_env = getenv("LD");
+	if(ld_env)
+	{
+		cmd_str = std::string("LD=") + ld_env + " " + cmd_str;
+		ld_prog = ld_env;
+	}
+
+	std::string host_cc = locate(host_arch, cc_prog);
+	std::string host_cxx = locate(host_arch, cxx_prog);
+	std::string host_ar = locate(host_arch, ar_prog);
+	std::string host_ld = locate(host_arch, ld_prog);
+	std::string build_cc = locate(build_arch, cc_prog);
+	std::string build_cxx = locate(build_arch, cxx_prog);
+	std::string build_ar = locate(build_arch, ar_prog);
+	std::string build_ld = locate(build_arch, ld_prog);
+
+	std::cout << "Writing results to: " << configurationFile.string() << "\n";
+	{
+		std::ofstream istr(configurationFile);
+		istr << "#include \"libcppbuild.h\"\n\n";
+		istr << "const std::map<std::string, std::string>& configuration()\n";
+		istr << "{\n";
+		istr << "	static std::map<std::string, std::string> c =\n";
+		istr << "	{\n";
+		istr << "		{ \"cmd\", \"" << cmd_str << "\" },\n";
+		istr << "		{ \"" << cfg::builddir << "\", \"" << settings.builddir << "\" },\n";
+		istr << "		{ \"" << cfg::host_cc << "\", \"" << host_cc << "\" },\n";
+		istr << "		{ \"" << cfg::host_cxx << "\", \"" << host_cxx << "\" },\n";
+		istr << "		{ \"" << cfg::host_ar << "\", \"" << host_ar << "\" },\n";
+		istr << "		{ \"" << cfg::host_ld << "\", \"" << host_ld << "\" },\n";
+		istr << "		{ \"" << cfg::build_cc << "\", \"" << build_cc << "\" },\n";
+		istr << "		{ \"" << cfg::build_cxx << "\", \"" << build_cxx << "\" },\n";
+		istr << "		{ \"" << cfg::build_ar << "\", \"" << build_ar << "\" },\n";
+		istr << "		{ \"" << cfg::build_ld << "\", \"" << build_ld << "\" },\n";
+		istr << "	};\n";
+		istr << "	return c;\n";
+		istr << "}\n";
+	}
+
+	{
+		std::ofstream istr(configHeaderFile);
+		istr << "#pragma once\n\n";
+		istr << "#define HAS_FOO 1\n";
+		istr << "//#define HAS_BAR 1\n";
+	}
+
+	return 0;
+}