From 7a16146600384272baf7fb2fc0fc64f59b17ffe9 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Wed, 8 Jun 2022 17:38:01 +0200
Subject: Function target type including support for generated sources.

---
 src/task_fn.cc | 121 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 src/task_fn.cc

(limited to 'src/task_fn.cc')

diff --git a/src/task_fn.cc b/src/task_fn.cc
new file mode 100644
index 0000000..ab00fae
--- /dev/null
+++ b/src/task_fn.cc
@@ -0,0 +1,121 @@
+// -*- c++ -*-
+// Distributed under the BSD 2-Clause License.
+// See accompanying file LICENSE for details.
+#include "task_fn.h"
+
+#include <iostream>
+#include <fstream>
+#include <cassert>
+
+#include "libctor.h"
+#include "execute.h"
+#include "util.h"
+
+TaskFn::TaskFn(const BuildConfiguration& config, const Settings& settings,
+               const std::string& sourceDir, const Source& source)
+	: Task(config, settings, sourceDir)
+	, config(config)
+	, settings(settings)
+{
+	sourceFile = sourceDir;
+	sourceFile /= source.file;
+
+	std::filesystem::create_directories(std::filesystem::path(settings.builddir) / sourceFile.parent_path());
+
+	target_type = config.type;
+	source_language = source.language;
+
+	if(source.output.empty())
+	{
+		std::cerr << "Missing output file for functional target\n";
+		exit(1);
+	}
+
+	_targetFile = source.output;
+}
+
+bool TaskFn::dirtyInner()
+{
+	if(!std::filesystem::exists(sourceFile))
+	{
+		//std::cout << "Missing source file: " << std::string(sourceFile) << "\n";
+		return true;
+	}
+
+	if(!std::filesystem::exists(targetFile()))
+	{
+		//std::cout << "Missing targetFile\n";
+		return true;
+	}
+
+	if(std::filesystem::last_write_time(sourceFile) >
+	   std::filesystem::last_write_time(targetFile()))
+	{
+		//std::cout << "The targetFile older than sourceFile\n";
+		return true;
+	}
+
+	return false;
+}
+
+int TaskFn::runInner()
+{
+	if(!std::filesystem::exists(sourceFile))
+	{
+		std::cout << "Missing source file: " << sourceFile.string() << "\n";
+		return 1;
+	}
+
+	if(settings.verbose >= 0)
+	{
+		std::cout << "Fn" << " " <<
+			sourceFile.lexically_normal().string() << " => " <<
+			targetFile().lexically_normal().string() << "\n";
+	}
+
+	return config.function(sourceFile.string(),
+	                       targetFile().string(),
+	                       config,
+	                       settings);
+}
+
+int TaskFn::clean()
+{
+	if(std::filesystem::exists(targetFile()))
+	{
+		std::cout << "Removing " << targetFile().string() << "\n";
+		std::filesystem::remove(targetFile());
+	}
+
+	return 0;
+}
+
+std::vector<std::string> TaskFn::depends() const
+{
+	return {};
+}
+
+std::string TaskFn::target() const
+{
+	return _targetFile;
+}
+
+std::filesystem::path TaskFn::targetFile() const
+{
+	return std::filesystem::path(settings.builddir) / sourceDir / _targetFile;
+}
+
+bool TaskFn::derived() const
+{
+	return false;
+}
+
+std::string TaskFn::toJSON() const
+{
+	return {}; // TODO: Not sure how to express this...
+}
+
+std::string TaskFn::source() const
+{
+	return sourceFile.string();
+}
-- 
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