From 0697033ec271aa76ecb9aff89487b7a07f6b4a8c Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Thu, 25 Dec 2025 18:24:30 +0100
Subject: Decorate sources as 'generated' to make sure they inject a dependency
 to their generators, and look for the sources in the build folder instead of
 the source folder.

---
 src/ctor.h     | 12 ++++++++++++
 src/task_cc.cc |  8 ++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/ctor.h b/src/ctor.h
index 8dd2ddd..f145eef 100644
--- a/src/ctor.h
+++ b/src/ctor.h
@@ -67,6 +67,12 @@ struct output_file
 	std::string file;
 };
 
+enum class source_type
+{
+	regular,
+	generated,
+};
+
 struct source
 {
 	template <class ... Args>
@@ -74,6 +80,7 @@ struct source
 		          std::is_convertible_v<Args, std::string_view> ||
 		          std::is_same_v<Args, ctor::toolchain> ||
 		          std::is_same_v<Args, ctor::language> ||
+		          std::is_same_v<Args, ctor::source_type> ||
 		          std::is_same_v<Args, ctor::output_file>
 		          ) && ...)
 	constexpr source(Args && ... arg)
@@ -96,6 +103,10 @@ struct source
 			{
 				output = arg.file;
 			}
+			else if constexpr(std::is_same_v<Args, ctor::source_type>)
+			{
+				source_type = arg;
+			}
 		}(), ...);
 	}
 
@@ -103,6 +114,7 @@ struct source
 	ctor::toolchain toolchain{ctor::toolchain::any};
 	ctor::language language{ctor::language::automatic};
 	std::string output{};
+	ctor::source_type source_type{ctor::source_type::regular};
 };
 
 enum class cxx_opt
diff --git a/src/task_cc.cc b/src/task_cc.cc
index 9628455..f81023f 100644
--- a/src/task_cc.cc
+++ b/src/task_cc.cc
@@ -23,6 +23,10 @@ TaskCC::TaskCC(const ctor::build_configuration& config_, const ctor::settings& s
 	, sourceDir(sourceDir_)
 	, _source(source)
 {
+	if(source.source_type == ctor::source_type::generated)
+	{
+		sourceFile = std::filesystem::path(settings.builddir) / sourceFile;
+	}
 	sourceFile /= source.file;
 
 	std::filesystem::path base = sourceFile.parent_path();
@@ -252,6 +256,10 @@ int TaskCC::clean()
 
 std::vector<std::string> TaskCC::depends() const
 {
+	if(_source.source_type == ctor::source_type::generated)
+	{
+		return {sourceFile.string()};
+	}
 	return {};
 }
 
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