From 6f42f40b47bcec1d4263767a03547d9ab203fc93 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Fri, 27 May 2022 09:34:50 +0200
Subject: Use built-in execute command for moc creation. And RAII for path
 changing.

---
 ctor.cc | 33 ++++++++++++++++++++++++++++-----
 1 file changed, 28 insertions(+), 5 deletions(-)

diff --git a/ctor.cc b/ctor.cc
index 2f4cb14..d4d4e28 100644
--- a/ctor.cc
+++ b/ctor.cc
@@ -3,8 +3,33 @@
 #include <filesystem>
 #include <iostream>
 
+#include <string>
+#include <vector>
+
+int execute(const std::string& command,
+            const std::vector<std::string>& args,
+            bool verbose = true);
+
 namespace
 {
+class PathRAII
+{
+public:
+	PathRAII(const std::filesystem::path& path)
+	{
+		pwd = std::filesystem::current_path();
+		std::filesystem::current_path(path);
+	}
+
+	~PathRAII()
+	{
+		std::filesystem::current_path(pwd);
+	}
+
+private:
+	std::filesystem::path pwd;
+};
+
 std::vector<Source> eval_mocs(const std::string& path,
                               const std::vector<std::pair<std::string, std::string>>& moc_list)
 {
@@ -26,13 +51,11 @@ std::vector<Source> eval_mocs(const std::string& path,
 		   std::filesystem::last_write_time(path / input) >
 		   std::filesystem::last_write_time(path / output))
 		{
-			std::string cmd = "cd \"" + path + "\"; moc ";
-			cmd += "-o \"" + output.string() + "\" \"" + input.string() + "\"";
-			std::cerr << cmd << "\n";
-			auto ret = system(cmd.data());
+			PathRAII p(path);
+			auto ret = execute("/usr/bin/moc", {"-o", output.string(), input.string()});
 			if(ret != 0)
 			{
-				std::cerr << "moc generation failed: " << cmd << '\n';
+				std::cerr << "moc generation failed\n";
 				exit(ret);
 			}
 		}
-- 
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