fix for ci and fetchcontent build

replace cmake --build with actual command in github format workflow for faster checking

examples/zmq_restream_example.cpp

@@ -0,0 +1,87 @@
+#include <chrono>
+#include <thread>
+
+#include "aare/file_io/File.hpp"
+#include "aare/network_io/ZmqSocketSender.hpp"
+
+#include <boost/program_options.hpp>
+
+using namespace aare;
+using namespace std;
+namespace po = boost::program_options;
+
+int main(int argc, char **argv) {
+    aare::logger::set_verbosity(aare::logger::DEBUG);
+
+    po::options_description desc("Allowed options");
+    desc.add_options()("help", "produce help message")("file,f", po::value<string>(), "input file")(
+        "port,p", po::value<uint16_t>(), "port number")("fps", po::value<uint16_t>()->default_value(1),
+                                                        "frames per second (default 1)")("loop,l",
+                                                                                         "loop over the file");
+    po::positional_options_description pd;
+    pd.add("file", -1);
+
+    po::variables_map vm;
+    try {
+        auto parsed = po::command_line_parser(argc, argv).options(desc).positional(pd).run();
+        po::store(parsed, vm);
+        po::notify(vm);
+
+    } catch (const boost::program_options::error &e) {
+        cout << e.what() << "\n";
+        cout << desc << "\n";
+        return 1;
+    }
+
+    if (vm.count("help")) {
+        cout << desc << "\n";
+        return 1;
+    }
+    if (vm.count("file") != 1) {
+        aare::logger::error("file is required");
+        cout << desc << "\n";
+        return 1;
+    }
+    if (vm.count("port") != 1) {
+        aare::logger::error("file is required");
+        cout << desc << "\n";
+        return 1;
+    }
+
+    std::string path = vm["file"].as<string>();
+    uint16_t port = vm["port"].as<uint16_t>();
+    bool loop = vm.count("loop") == 1 ? true : false;
+    uint16_t fps = vm["fps"].as<uint16_t>();
+
+    aare::logger::debug("ARGS: file:", path, "port:", port, "fps:", fps, "loop:", loop);
+    auto d = round<std::chrono::milliseconds>(std::chrono::duration<double>{1. / fps});
+    aare::logger::debug("sleeping for", d.count(), "ms");
+
+    if (!std::filesystem::exists(path)) {
+        aare::logger::error("file does not exist");
+        return 1;
+    }
+
+    std::filesystem::path tmp(path);
+
+    File file(tmp, "r");
+    string endpoint = "tcp://*:" + std::to_string(port);
+    ZmqSocketSender sender(endpoint);
+    sender.bind();
+    std::this_thread::sleep_for(d); // slow joiner problem should fix this
+
+    for (size_t frameidx = 0; frameidx < file.total_frames(); frameidx++) {
+
+        Frame frame = file.read();
+        ZmqHeader header;
+        header.frameNumber = frameidx;
+        header.data = true;
+        header.npixelsx = frame.rows();
+        header.npixelsy = frame.cols();
+        header.dynamicRange = frame.bitdepth();
+        header.imageSize = frame.size();
+
+        sender.send({header, frame});
+        std::this_thread::sleep_for(d);
+    }
+}