Add compilation database generation.

1 files changed, 37 insertions, 0 deletions

diff --git a/libcppbuild.cc b/libcppbuild.cc
index 9fcc4d4..8d5231f 100644
--- a/libcppbuild.cc
+++ b/libcppbuild.cc
@@ -11,6 +11,7 @@
 #include <list>
 #include <array>
 #include <deque>
+#include <fstream>
 
 #include <getoptpp/getoptpp.hpp>
 
@@ -179,6 +180,9 @@ int main(int argc, char* argv[])
 		std::max(1u, std::thread::hardware_concurrency() * 2 - 1);
 	settings.verbose = 0;
 
+	bool write_compilation_database{false};
+	std::string compilation_database;
+
 	dg::Options opt;
 
 	opt.add("jobs", required_argument, 'j',
@@ -210,6 +214,14 @@ int main(int argc, char* argv[])
 		        return 0;
 	        });
 
+	opt.add("database", required_argument, 'd',
+	        "Write compilation database json file.",
+	        [&]() {
+		        write_compilation_database = true;
+		        compilation_database = optarg;
+		        return 0;
+	        });
+
 	opt.add("help", no_argument, 'h',
 	        "Print this help text.",
 	        [&]() {
@@ -246,6 +258,31 @@ int main(int argc, char* argv[])
 		}
 	}
 
+	if(write_compilation_database)
+	{
+		std::ofstream istr(compilation_database);
+		istr << "[";
+		bool first{true};
+		for(auto task : tasks)
+		{
+			auto s = task->toJSON();
+			if(!s.empty())
+			{
+				if(!first)
+				{
+					istr << ",\n";
+				}
+				else
+				{
+					istr << "\n";
+				}
+				first = false;
+				istr << s;
+			}
+		}
+		istr << "\n]\n";
+	}
+
 	for(auto task : tasks)
 	{
 		if(task->registerDepTasks(tasks))