From 0008920eed996009068fe9f71512c436577b6220 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Wed, 2 Oct 2024 21:20:40 +0200
Subject: Ensure the initial task order is preserved. Fixes bad ordering during
 linking.

---
 src/build.cc | 43 ++++++++++++++++++++++++++-----------------
 1 file changed, 26 insertions(+), 17 deletions(-)

(limited to 'src/build.cc')

diff --git a/src/build.cc b/src/build.cc
index ad30719..ea65656 100644
--- a/src/build.cc
+++ b/src/build.cc
@@ -4,12 +4,11 @@
 #include "build.h"
 
 #include <future>
-#include <vector>
 #include <iostream>
 #include <chrono>
-#include <set>
 #include <thread>
 #include <list>
+#include <algorithm>
 
 #include "ctor.h"
 
@@ -17,8 +16,8 @@ using namespace std::chrono_literals;
 
 int build(const ctor::settings& settings,
           const std::string& name,
-          const std::set<std::shared_ptr<Task>>& tasks,
-          const std::set<std::shared_ptr<Task>>& all_tasks,
+          const std::vector<std::shared_ptr<Task>>& tasks,
+          const std::vector<std::shared_ptr<Task>>& all_tasks,
           bool dryrun)
 {
 	if(settings.verbose > 1)
@@ -26,12 +25,13 @@ int build(const ctor::settings& settings,
 		std::cout << "Building '" << name << "'\n";
 	}
 
-	std::set<std::shared_ptr<Task>> dirtyTasks;
+	std::vector<std::shared_ptr<Task>> dirtyTasks;
 	for(auto task : tasks)
 	{
-		if(task->dirty())
+		if(task->dirty() &&
+		   std::find(dirtyTasks.begin(), dirtyTasks.end(), task) == dirtyTasks.end())
 		{
-			dirtyTasks.insert(task);
+			dirtyTasks.push_back(task);
 		}
 	}
 
@@ -135,10 +135,10 @@ int build(const ctor::settings& settings,
 
 namespace
 {
-std::set<std::shared_ptr<Task>> getDepTasks(std::shared_ptr<Task> task)
+std::vector<std::shared_ptr<Task>> getDepTasks(std::shared_ptr<Task> task)
 {
-	std::set<std::shared_ptr<Task>> tasks;
-	tasks.insert(task);
+	std::vector<std::shared_ptr<Task>> tasks;
+	tasks.push_back(task);
 
 	auto deps = task->getDependsTasks();
 	for(const auto& dep : deps)
@@ -146,7 +146,10 @@ std::set<std::shared_ptr<Task>> getDepTasks(std::shared_ptr<Task> task)
 		auto depSet = getDepTasks(dep);
 		for(const auto& dep : depSet)
 		{
-			tasks.insert(dep);
+			if(std::find(tasks.begin(), tasks.end(), dep) == tasks.end())
+			{
+				tasks.push_back(dep);
+			}
 		}
 	}
 
@@ -156,7 +159,7 @@ std::set<std::shared_ptr<Task>> getDepTasks(std::shared_ptr<Task> task)
 
 int build(const ctor::settings& settings,
           const std::string& name,
-          const std::set<std::shared_ptr<Task>>& all_tasks,
+          const std::vector<std::shared_ptr<Task>>& all_tasks,
           bool dryrun)
 {
 	bool task_found{false};
@@ -167,10 +170,13 @@ int build(const ctor::settings& settings,
 			task_found = true;
 
 			auto depSet = getDepTasks(task);
-			std::set<std::shared_ptr<Task>> ts;
+			std::vector<std::shared_ptr<Task>> ts;
 			for(const auto& task : depSet)
 			{
-				ts.insert(task);
+				if(std::find(ts.begin(), ts.end(), task) == ts.end())
+				{
+					ts.push_back(task);
+				}
 			}
 
 			auto ret = build(settings, name, ts, all_tasks, dryrun);
@@ -195,11 +201,11 @@ int build(const ctor::settings& settings,
 int build(const ctor::settings& settings,
           const std::string& name,
           const std::vector<Target>& targets,
-          const std::set<std::shared_ptr<Task>>& all_tasks,
+          const std::vector<std::shared_ptr<Task>>& all_tasks,
           bool dryrun)
 {
 	bool task_found{false};
-	std::set<std::shared_ptr<Task>> ts;
+	std::vector<std::shared_ptr<Task>> ts;
 
 	for(const auto& target : targets)
 	{
@@ -213,7 +219,10 @@ int build(const ctor::settings& settings,
 				auto depSet = getDepTasks(task);
 				for(const auto& task : depSet)
 				{
-					ts.insert(task);
+					if(std::find(ts.begin(), ts.end(), task) == ts.end())
+					{
+						ts.push_back(task);
+					}
 				}
 			}
 		}
-- 
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