First draft at autogenerating the table in the README.

scripts/mkdocindex.cc

@@ -0,0 +1,55 @@
+#include "lib/globals.h"
+#include "lib/proto.h"
+#include "lib/flags.h"
+#include <fmt/format.h>
+
+extern const std::map<std::string, const ConfigProto*> formats;
+
+int main(int argc, const char* argv[])
+{
+	fmt::print("<!-- FORMATSSTART -->\n");
+	fmt::print("<!-- This section is automatically generated. Do not edit. -->\n");
+	fmt::print("| Profile | Format | Read? | Write? | Filesystem? |\n");
+	fmt::print("|:--------|:------:|:-----:|:------:|-------------|\n");
+
+	for (auto [name, config] : formats)
+	{
+		if (config->is_extension())
+			continue;
+
+		std::set<std::string> filesystems;
+		auto addFilesystem = [&](const FilesystemProto& fs) {
+			if (fs.type() != FilesystemProto::NOT_SET)
+			{
+const auto *descriptor = FilesystemProto::FilesystemType_descriptor();
+auto name = descriptor->FindValueByNumber(fs.type())->name();
+
+				filesystems.insert(name);
+				}
+		};
+
+		addFilesystem(config->filesystem());
+		for (const auto& group : config->option_group())
+		{
+			for (const auto& option : group.option())
+				addFilesystem(option.config().filesystem());
+		}
+		for (const auto& option : config->option())
+			addFilesystem(option.config().filesystem());
+
+		std::stringstream ss;
+		for (auto& fs : filesystems)
+			ss << fs << " ";
+
+		fmt::print("| {} | {} | {} | {} | {} |\n",
+			name, config->comment(),
+				config->has_decoder() ? "YES" : "",
+				config->has_encoder() ? "YES" : "",
+				ss.str());
+	}
+
+	std::cout << "{: .datatable }\n";
+	fmt::print("<!-- FORMATSEND -->\n");
+    return 0;
+}
+