From 8a35724397e84e9d23a44a4f2d3a3e73fe25d9e7 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Tue, 22 Jun 2021 18:48:16 +0200
Subject: Add parameters to add, delete and list build configurations.

---
 Makefile       |  4 +--
 bootstrap.sh   |  7 +----
 libcppbuild.cc | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++++++----
 3 files changed, 90 insertions(+), 13 deletions(-)

diff --git a/Makefile b/Makefile
index 4b43083..14d909e 100644
--- a/Makefile
+++ b/Makefile
@@ -24,8 +24,8 @@ CXXFLAGS = -g -O3 -std=c++17 -I.
 libcppbuild.a: $(OBJ)
 	ar rcs $@ $(OBJ)
 
-cppbuild: cppbuild.cc subdir/cppbuild.cc libcppbuild.a
-	g++ $(CXXFLAGS) -pthread cppbuild.cc subdir/cppbuild.cc libcppbuild.a -o $@
+cppbuild: libcppbuild.a
+	g++ $(CXXFLAGS) -pthread libcppbuild.a -o $@
 
 clean:
 	rm -f libcppbuild.a $(OBJ) cppbuild $(DEPFILES)
diff --git a/bootstrap.sh b/bootstrap.sh
index 0172c10..29b422b 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -1,7 +1,2 @@
 #!/bin/bash
-CFGS="\
-  cppbuild.cc \
-  subdir/cppbuild.cc \
-"
-
-g++ -std=c++17 $CFGS -pthread libcppbuild.a -o cppbuild
+g++ -std=c++17 -pthread libcppbuild.a -o cppbuild
diff --git a/libcppbuild.cc b/libcppbuild.cc
index 5e63029..7280910 100644
--- a/libcppbuild.cc
+++ b/libcppbuild.cc
@@ -12,6 +12,7 @@
 #include <array>
 #include <deque>
 #include <fstream>
+#include <set>
 
 #include <getoptpp/getoptpp.hpp>
 
@@ -147,7 +148,7 @@ struct BuildConfigurationEntry
 	std::vector<BuildConfiguration> (*cb)();
 };
 std::array<BuildConfigurationEntry, 1024> configFiles;
-int numConfigFiles{0};
+std::size_t numConfigFiles{0};
 }
 
 // TODO: Use c++20 when ready, somehing like this:
@@ -165,12 +166,37 @@ int reg(const char* location, std::vector<BuildConfiguration> (*cb)())
 	configFiles[numConfigFiles].file = location;
 	configFiles[numConfigFiles].cb = cb;
 	++numConfigFiles;
+
 	return 0;
 }
 
-void recompileCheck(const Settings& settings, int argc, char* argv[])
+int unreg(const char* location)
 {
-	bool dirty{false};
+	std::size_t found{0};
+	for(std::size_t i = 0; i < numConfigFiles;)
+	{
+		if(std::string(location) == configFiles[i].file)
+		{
+			++found;
+			for(std::size_t j = i; j < numConfigFiles; ++j)
+			{
+				configFiles[j] = configFiles[j + 1];
+			}
+			--numConfigFiles;
+		}
+		else
+		{
+			++i;
+		}
+	}
+
+	return found;
+}
+
+void recompileCheck(const Settings& settings, int argc, char* argv[],
+                    bool force = false)
+{
+	bool dirty{force};
 
 	std::vector<std::string> args;
 	args.push_back("-s");
@@ -203,7 +229,7 @@ void recompileCheck(const Settings& settings, int argc, char* argv[])
 		std::cout << "Recompile check (" << numConfigFiles << "):\n";
 	}
 
-	for(int i = 0; i < numConfigFiles; ++i)
+	for(std::size_t i = 0; i < numConfigFiles; ++i)
 	{
 		std::string location = configFiles[i].file;
 		if(settings.verbose > 1)
@@ -254,7 +280,7 @@ std::list<std::shared_ptr<Task>> getTasks(const Settings& settings)
 {
 	static std::deque<BuildConfiguration> build_configs;
 	std::list<std::shared_ptr<Task>> tasks;
-	for(int i = 0; i < numConfigFiles; ++i)
+	for(std::size_t i = 0; i < numConfigFiles; ++i)
 	{
 		std::string path =
 			std::filesystem::path(configFiles[i].file).parent_path();
@@ -410,6 +436,9 @@ int main(int argc, char* argv[])
 	std::string compilation_database;
 	bool print_configure_cmd{false};
 	bool print_configure_db{false};
+	std::vector<std::string> add_files;
+	std::vector<std::string> remove_files;
+	bool list_files{false};
 
 	dg::Options opt;
 	int key{256};
@@ -444,6 +473,27 @@ int main(int argc, char* argv[])
 		        return 0;
 	        });
 
+	opt.add("add", required_argument, 'a',
+	        "Add specified file to the build configurations.",
+	        [&]() {
+		        add_files.push_back(optarg);
+		        return 0;
+	        });
+
+	opt.add("remove", required_argument, 'r',
+	        "Remove specified file from the build configurations.",
+	        [&]() {
+		        remove_files.push_back(optarg);
+		        return 0;
+	        });
+
+	opt.add("list", no_argument, 'l',
+	        "List files in the build configurations.",
+	        [&]() {
+		        list_files = true;
+		        return 0;
+	        });
+
 	opt.add("configure-cmd", no_argument, key++,
 	        "Print commandline for last configure.",
 	        [&]() {
@@ -477,6 +527,38 @@ int main(int argc, char* argv[])
 
 	opt.process(argc, argv);
 
+	if(list_files)
+	{
+		std::set<std::string> files;
+		for(std::size_t i = 0; i < numConfigFiles; ++i)
+		{
+			files.insert(configFiles[i].file);
+		}
+
+		for(const auto& file : files)
+		{
+			std::cout << file << "\n";
+		}
+
+		return 0;
+	}
+
+	if(!add_files.empty() || !remove_files.empty())
+	{
+		for(const auto& add_file : add_files)
+		{
+			reg(add_file.data(), [](){ return std::vector<BuildConfiguration>{};});
+		}
+
+		for(const auto& remove_file : remove_files)
+		{
+			unreg(remove_file.data());
+		}
+
+		// Force rebuild if files were added
+		recompileCheck(settings, 1, argv, true);
+	}
+
 	recompileCheck(settings, argc, argv);
 
 	std::filesystem::path builddir(settings.builddir);
-- 
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