From 1b2029dbbbfdafb618aca3eccdbbba2512b5b49b Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Sun, 5 Jul 2026 00:56:42 +0200
Subject: kel rap for running multiple sims

---
 kel_rap/.nix/derivation.nix | 19 +++++++++++++
 kel_rap/SConstruct          | 69 +++++++++++++++++++++++++++++++++++++++++++++
 kel_rap/c++/SConscript      | 32 +++++++++++++++++++++
 kel_rap/c++/kel_rap.cpp     | 51 +++++++++++++++++++++++++++++++++
 4 files changed, 171 insertions(+)
 create mode 100644 kel_rap/.nix/derivation.nix
 create mode 100644 kel_rap/SConstruct
 create mode 100644 kel_rap/c++/SConscript
 create mode 100644 kel_rap/c++/kel_rap.cpp

(limited to 'kel_rap')

diff --git a/kel_rap/.nix/derivation.nix b/kel_rap/.nix/derivation.nix
new file mode 100644
index 0000000..54c41fd
--- /dev/null
+++ b/kel_rap/.nix/derivation.nix
@@ -0,0 +1,19 @@
+{ stdenv
+, scons
+, clang-tools
+}:
+
+stdenv.mkDerivation {
+	pname = "kel_rap";
+	version = "0.0.0";
+
+	nativeBuildInputs = [
+		clang-tools
+		scons
+	];
+
+	buildInputs = [
+	];
+
+	src = ./..;
+}
diff --git a/kel_rap/SConstruct b/kel_rap/SConstruct
new file mode 100644
index 0000000..262dced
--- /dev/null
+++ b/kel_rap/SConstruct
@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+import os.path
+import glob
+import re
+
+if sys.version_info < (3,):
+    def isbasestring(s):
+        return isinstance(s,basestring)
+else:
+    def isbasestring(s):
+        return isinstance(s, (str,bytes))
+
+def add_kel_source_files(self, sources, filetype, lib_env=None, shared=False, target_post=""):
+
+    if isbasestring(filetype):
+        dir_path = self.Dir('.').abspath
+        filetype = sorted(glob.glob(dir_path+"/"+filetype))
+
+    for path in filetype:
+        target_name = re.sub( r'(.*?)(\.cpp|\.c\+\+)', r'\1' + target_post, path )
+        if shared:
+            target_name+='.os'
+            sources.append( self.SharedObject( target=target_name, source=path ) )
+        else:
+            target_name+='.o'
+            sources.append( self.StaticObject( target=target_name, source=path ) )
+    pass
+
+def isAbsolutePath(key, dirname, env):
+	assert os.path.isabs(dirname), "%r must have absolute path syntax" % (key,)
+
+env_vars = Variables(
+	args=ARGUMENTS
+)
+
+env_vars.Add('prefix',
+	help='Installation target location of build results and headers',
+	default='/usr/local/',
+	validator=isAbsolutePath
+);
+
+env=Environment(ENV=os.environ, variables=env_vars, CPPPATH=[],
+    CXX=['c++'],
+    CPPDEFINES=['SAW_UNIX'],
+    CXXFLAGS=['-std=c++20','-g','-Wall','-Wextra'],
+    LIBS=[
+    ]
+)
+env.__class__.add_source_files = add_kel_source_files
+env.Tool('compilation_db');
+env.cdb = env.CompilationDatabase('compile_commands.json');
+
+env.objects = [];
+env.sources = [];
+env.headers = [];
+env.targets = [];
+
+Export('env')
+SConscript('c++/SConscript')
+#SConscript('tests/SConscript')
+
+env.Alias('cdb', env.cdb);
+env.Alias('all', [env.targets]);
+env.Default('all');
+
+env.Alias('install', '$prefix')
diff --git a/kel_rap/c++/SConscript b/kel_rap/c++/SConscript
new file mode 100644
index 0000000..bfcedae
--- /dev/null
+++ b/kel_rap/c++/SConscript
@@ -0,0 +1,32 @@
+#!/bin/false
+
+import os
+import os.path
+import glob
+
+
+Import('env')
+
+dir_path = Dir('.').abspath
+
+# Environment for base library
+program_env = env.Clone();
+
+program_env.sources = sorted(glob.glob(dir_path + "/*.cpp"))
+program_env.headers = sorted(glob.glob(dir_path + "/*.hpp"))
+
+env.sources += program_env.sources;
+env.headers += program_env.headers;
+
+## Static lib
+objects_static = []
+program_env.add_source_files(objects_static, program_env.sources, shared=False);
+env.binary = program_env.Program('#build/kel_rap', [objects_static]);
+
+# Set Alias
+env.Alias('binary', [env.binary]);
+
+env.targets += ['binary'];
+
+# Install
+env.Install('$prefix/bin/', [env.binary]);
diff --git a/kel_rap/c++/kel_rap.cpp b/kel_rap/c++/kel_rap.cpp
new file mode 100644
index 0000000..d505125
--- /dev/null
+++ b/kel_rap/c++/kel_rap.cpp
@@ -0,0 +1,51 @@
+#include <array>
+#include <filesystem>
+#include <iostream>
+#include <string>
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+namespace fs = std::filesystem;
+
+int main(int argc, char* argv[]) {
+    if (argc != 2) {
+        std::cerr << "Usage: " << argv[0] << " <dir>\n";
+        return -1;
+    }
+
+    for (const auto& e : fs::directory_iterator(argv[1])) {
+        if (!e.is_regular_file())
+            continue;
+
+        std::string path = e.path().string();
+
+        pid_t pid = fork();
+        if (pid < 0) {
+            std::cerr << "fork failed\n";
+            return -1;
+        }
+
+        if (pid == 0) {
+			  std::string path = e.path().string();
+				std::array<char*, 2> args{
+					 path.data(),
+					 nullptr
+				};
+
+				execvp(args[0], args.data());
+
+            std::cerr << "execvp failed: " << path << '\n';
+            return -1;
+        }
+
+        int status;
+        if (waitpid(pid, &status, 0) < 0) {
+            std::cerr << "waitpid failed\n";
+            return -1;
+        }
+    }
+
+    return 0;
+}
-- 
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