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feat: add cli option to dump default config

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Closes: https://github.com/aristocratos/btop/issues/1394
This commit is contained in:
Steffen Winter
2025-12-13 12:05:10 +01:00
committed by Steffen
parent c2b477ec9f
commit 10086d6009
6 changed files with 133 additions and 29 deletions
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42
src/btop_config.cpp
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@@ -20,12 +20,14 @@ tab-size = 4
#include <atomic>
#include <filesystem>
#include <fstream>
#include <iterator>
#include <locale>
#include <optional>
#include <ranges>
#include <string_view>
#include <utility>
#include <fmt/base.h>
#include <fmt/core.h>
#include <sys/statvfs.h>
@@ -782,20 +784,9 @@ namespace Config {
Logger::debug("Writing new config file");
if (geteuid() != Global::real_uid and seteuid(Global::real_uid) != 0) return;
std::ofstream cwrite(conf_file, std::ios::trunc);
cwrite.imbue(std::locale::classic());
// TODO: Report error when stream is in a bad state.
if (cwrite.good()) {
cwrite << "#? Config file for btop v. " << Global::Version << "\n";
for (const auto& [name, description] : descriptions) {
cwrite << "\n" << (description.empty() ? "" : description + "\n")
<< name << " = ";
if (strings.contains(name))
cwrite << "\"" << strings.at(name) << "\"";
else if (ints.contains(name))
cwrite << ints.at(name);
else if (bools.contains(name))
cwrite << (bools.at(name) ? "True" : "False");
cwrite << "\n";
}
cwrite << current_config();
}
}
@@ -828,4 +819,29 @@ namespace Config {
auto get_log_file() -> std::optional<fs::path> {
return get_xdg_state_dir().transform([](auto&& state_home) -> auto { return state_home / "btop.log"; });
}
auto current_config() -> std::string {
auto buffer = std::string {};
fmt::format_to(std::back_inserter(buffer), "#? Config file for btop v.{}\n", Global::Version);
for (const auto& [name, description] : descriptions) {
// Write a description comment if available.
fmt::format_to(std::back_inserter(buffer), "\n");
if (!description.empty()) {
fmt::format_to(std::back_inserter(buffer), "{}\n", description);
}
fmt::format_to(std::back_inserter(buffer), "{} = ", name);
// Lookup default value by name and write it out.
if (strings.contains(name)) {
fmt::format_to(std::back_inserter(buffer), R"("{}")", strings[name]);
} else if (ints.contains(name)) {
fmt::format_to(std::back_inserter(buffer), std::locale::classic(), "{:L}", ints[name]);
} else if (bools.contains(name)) {
fmt::format_to(std::back_inserter(buffer), "{}", bools[name] ? "True" : "False");
}
fmt::format_to(std::back_inserter(buffer), "\n");
}
return buffer;
}
}