Prepare Release 25.10

.markdown-link-check.json

@@ -5,6 +5,7 @@
   "ignorePatterns": [
     { "pattern": "go-cart\\.io" },
     { "pattern": "pnas\\.org/content/115/10/E2156" },
-    { "pattern": "doi\\.org/10\\.1073/pnas\\.0400280101" }
+    { "pattern": "doi\\.org/10\\.1073/pnas\\.0400280101" },
+    { "pattern": "gnu\\.org/licenses/agpl-3\\.0" }
   ]
 }

include/constants.hpp

@@ -65,4 +65,7 @@ constexpr double xi_sq = 4.0;
 // ly
 constexpr unsigned int plotted_cell_length = 8;
 
+// Version
+const std::string version = "25.10";
+
 #endif  // CONST_HPP_

src/cartogram_info/write_geojson.cpp

@@ -1,5 +1,6 @@
 #include "cartogram_info.hpp"
 #include "constants.hpp"
+#include <format>
 
 // Function that returns coordinates of the end points of a "divider" line
 // segment used to separate between different insets
@@ -192,9 +193,10 @@ void CartogramInfo::json_to_geojson(
       add_dividers_to_geojson(container[(container.size() - 1)]);
   }
 
-  new_json["properties"]["note"] =
-    "Created using cartogram-cpp / go-cart.io with custom projection, not in "
-    "EPSG:4326";
+  new_json["properties"]["note"] = std::format(
+    "Created with cartogram-cpp v{}. Coordinates are in a custom projection, "
+    "not EPSG:4326.",
+    version);
 
   // Write that the map is projected
   new_json["properties"]["projected"] = true;

src/main.cpp

@@ -1,9 +1,18 @@
 #include "cartogram_info.hpp"
+#include "constants.hpp"
 #include "parse_arguments.hpp"
 #include "progress_tracker.hpp"
+#include <format>
+#include <iomanip>
+#include <ranges>
+#include <span>
+
+static void print_version_and_command_line(const int, const char *[]);
 
 int main(const int argc, const char *argv[])
 {
+  print_version_and_command_line(argc, argv);
+
   // Parse command-line arguments
   Arguments args = parse_arguments(argc, argv);
 
@@ -79,3 +88,17 @@ int main(const int argc, const char *argv[])
     return EXIT_FAILURE;
   return EXIT_SUCCESS;
 }
+
+static void print_version_and_command_line(const int argc, const char *argv[])
+{
+  std::cerr << std::format("Version {}\n", version);
+
+  std::span<const char *> raw_args{argv, static_cast<std::size_t>(argc)};
+  if (!raw_args.empty()) {
+    std::cerr << "Command: " << std::quoted(raw_args.front());
+    std::ranges::for_each(raw_args | std::views::drop(1), [](const char *s) {
+      std::cerr << ' ' << std::quoted(s);
+    });
+    std::cerr << '\n';
+  }
+}

src/misc/parse_arguments.cpp

@@ -8,7 +8,7 @@ Arguments parse_arguments(const int argc, const char *argv[])
 
   // Create parser for arguments using argparse.
   // From https://github.com/p-ranav/argparse
-  argparse::ArgumentParser arguments("./cartogram", "25.9");
+  argparse::ArgumentParser arguments("./cartogram", version);
 
   // Positional argument accepting geometry file (GeoJSON, JSON) as input
   arguments.add_argument("geometry_file")