From f31661d392c1332ceb0edcbc9fd35f4cb49bb50d Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Wed, 11 Jan 2023 16:35:57 +0100
Subject: Support using custom build-dir during bootstrap.

---
 src/bootstrap.cc |  8 +++++++-
 src/configure.cc | 30 ++++++++++++++++++++++++++----
 2 files changed, 33 insertions(+), 5 deletions(-)

(limited to 'src')

diff --git a/src/bootstrap.cc b/src/bootstrap.cc
index c58c399..d473689 100644
--- a/src/bootstrap.cc
+++ b/src/bootstrap.cc
@@ -42,6 +42,12 @@ const std::string& getConfiguration(const std::string& key,
 		return s;
 	}
 
+	if(key == cfg::builddir && std::getenv("BUILDDIR"))
+	{
+		static std::string s = std::getenv("BUILDDIR");
+		return s;
+	}
+
 	return defaultValue;
 }
 
@@ -56,7 +62,7 @@ int main(int argc, char* argv[])
 
 	Settings settings{};
 
-	settings.builddir = getConfiguration(cfg::builddir, "build");
+	settings.builddir = getConfiguration(cfg::builddir, settings.builddir);
 	settings.parallel_processes =
 		std::max(1u, std::thread::hardware_concurrency() * 2 - 1);
 	settings.verbose = 0;
diff --git a/src/configure.cc b/src/configure.cc
index 50a7c32..25403f7 100644
--- a/src/configure.cc
+++ b/src/configure.cc
@@ -32,6 +32,7 @@ namespace ctor
 {
 std::optional<std::string> includedir;
 std::optional<std::string> libdir;
+std::optional<std::string> builddir;
 std::map<std::string, std::string> conf_values;
 }
 
@@ -47,6 +48,11 @@ bool hasConfiguration(const std::string& key)
 		return true;
 	}
 
+	if(key == cfg::builddir && ctor::builddir)
+	{
+		return true;
+	}
+
 	if(ctor::conf_values.find(key) != ctor::conf_values.end())
 	{
 		return true;
@@ -69,6 +75,11 @@ const std::string& getConfiguration(const std::string& key,
 		return *ctor::libdir;
 	}
 
+	if(key == cfg::builddir && ctor::builddir)
+	{
+		return *ctor::builddir;
+	}
+
 	if(ctor::conf_values.find(key) != ctor::conf_values.end())
 	{
 		return ctor::conf_values[key];
@@ -160,11 +171,10 @@ public:
 // helper constant for the visitor
 template<class> inline constexpr bool always_false_v = false;
 
-int regenerateCache(const Settings& default_settings,
+int regenerateCache(Settings& settings,
                     const std::vector<std::string>& args,
                     const std::map<std::string, std::string>& env)
 {
-	Settings settings{default_settings};
 	Args vargs(args);
 
 	dg::Options opt;
@@ -180,12 +190,14 @@ int regenerateCache(const Settings& default_settings,
 	std::string ld_prog = "ld";
 	std::string ctor_includedir;
 	std::string ctor_libdir;
+	std::string builddir;
 
 	opt.add("build-dir", required_argument, 'b',
 	        "Set output directory for build files (default: '" +
 	        settings.builddir + "').",
 	        [&]() {
 		        settings.builddir = optarg;
+		        builddir = optarg;
 		        return 0;
 	        });
 
@@ -396,6 +408,10 @@ int regenerateCache(const Settings& default_settings,
 	{
 		ctor::conf_values[cfg::ctor_libdir] = ctor_libdir;
 	}
+	if(!builddir.empty())
+	{
+		ctor::conf_values[cfg::builddir] = builddir;
+	}
 	ctor::conf_values[cfg::host_cxx] = host_cxx;
 	ctor::conf_values[cfg::build_cxx] = build_cxx;
 
@@ -421,7 +437,11 @@ int regenerateCache(const Settings& default_settings,
 		istr << "},\n";
 
 		istr << "		.tools = {\n";
-		istr << "			{ \"" << cfg::builddir << "\", \"" << settings.builddir << "\" },\n";
+		if(!builddir.empty())
+		{
+			istr << "			{ \"" << cfg::builddir << "\", \"" << builddir << "\" },\n";
+			ctor::builddir = builddir;
+		}
 		istr << "			{ \"" << cfg::host_cc << "\", \"" << host_cc << "\" },\n";
 		istr << "			{ \"" << cfg::host_cxx << "\", \"" << host_cxx << "\" },\n";
 		istr << "			{ \"" << cfg::host_ar << "\", \"" << host_ar << "\" },\n";
@@ -567,8 +587,10 @@ int configure(const Settings& global_settings, int argc, char* argv[])
 	return 0;
 }
 
-int reconfigure(const Settings& settings, int argc, char* argv[])
+int reconfigure(const Settings& global_settings, int argc, char* argv[])
 {
+	Settings settings{global_settings};
+
 	bool no_rerun{false};
 
 	std::vector<std::string> args;
-- 
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