From 65b71872aad027a129cd9682cc9c299997b2060c Mon Sep 17 00:00:00 2001
From: Aqua-sama <aqua@iserlohn-fortress.net>
Date: Sat, 21 Nov 2020 17:49:28 +0200
Subject: Probe several locations for configuration file

---
 src/browser.cpp   |  4 +++-
 src/settings.h.in | 63 ++++++++++++++++++++++++++++++++++++++++++++-----------
 src/version.h.in  |  8 +++++++
 3 files changed, 62 insertions(+), 13 deletions(-)

(limited to 'src')

diff --git a/src/browser.cpp b/src/browser.cpp
index d225cbe..b05c620 100644
--- a/src/browser.cpp
+++ b/src/browser.cpp
@@ -66,7 +66,9 @@ void Browser::aboutPlugins()
 void Browser::loadConfiguration(const QString &path)
 {
     auto ctx = init_conf(path.toStdString());
-    spdlog::info("Using configuration [{}]: {}", ctx.path, ctx.ptr->make_global() ? "okay" : "failed");
+    spdlog::info("Using configuration [{}]: {}",
+        (ctx.path ? ctx.path->c_str() : "none"),
+        ctx.ptr->make_global() ? "okay" : "failed");
     m_conf = std::move(ctx.ptr);
 
     if(const auto _translation = m_conf->value<QString>("browser.translation")) {
diff --git a/src/settings.h.in b/src/settings.h.in
index 605288e..51b2bd0 100644
--- a/src/settings.h.in
+++ b/src/settings.h.in
@@ -1,13 +1,25 @@
+/*
+ * This file is part of smolbote. It's copyrighted by the contributors recorded
+ * in the version control history of the file, available from its original
+ * location: https://neueland.iserlohn-fortress.net/cgit/smolbote
+ *
+ * SPDX-License-Identifier: GPL-3.0
+ */
+
 #pragma once
 
-#include <QStandardPaths>
 #include <configuration.h>
 #include <fstream>
+#include <cstdlib>
+#include <filesystem>
+#include <array>
+#include <spdlog/spdlog.h>
 
 inline auto init_conf(const std::string &path)
 {
+    namespace fs = std::filesystem;
     struct {
-        std::string path;
+        std::optional<fs::path> path;
         std::unique_ptr<Configuration> ptr;
     } conf;
 
@@ -15,17 +27,44 @@ inline auto init_conf(const std::string &path)
         @__DEFAULT_CFG__
     });
 
-    conf.path = path.empty() ? conf.ptr->value<std::string>("poi.cfg.path").value() : path;
-    if(conf.path.front() == '~') {
-        conf.path.replace(0, 1, QStandardPaths::writableLocation(QStandardPaths::HomeLocation).toStdString());
-    };
+    conf.path = [&]() -> std::optional<fs::path> {
+        if(!path.empty()) {
+            return fs::path(path);
+        }
 
-    std::fstream fs;
-    fs.open(conf.path, std::fstream::in);
-    if(fs.is_open()) {
-        conf.ptr->read(fs);
-        fs.close();
-    }
+        // 1000: invalid; 0: $HOME; 1: $XDG_CONFIG_HOME
+        std::array<std::optional<fs::path>, 2> home = { std::nullopt, std::nullopt };
+        if(const char* usr = std::getenv("HOME"))
+            home[0] = fs::path(usr);
+        if(const char* xdg = std::getenv("XDG_CONFIG_HOME"))
+            home[1] = fs::path(xdg);
+
+        for(const auto &pair : {
+                @__CONFIG_PATHS__
+            }) {
+            if(pair.first < 0) {
+                auto p = fs::path(pair.second);
+                spdlog::debug("Trying {}", p.c_str());
+                if(fs::exists(p))
+                    return p;
+            } else if(home[static_cast<std::size_t>(pair.first)]) {
+                auto p = home[static_cast<std::size_t>(pair.first)].value() / pair.second;
+                spdlog::debug("Trying {}", p.c_str());
+                if(fs::exists(p))
+                    return p;
+            }
+        }
 
+        return std::nullopt;
+
+    }();
+
+    if(conf.path) {
+        std::fstream file(conf.path.value(), std::fstream::in);
+        if(file.is_open()) {
+            conf.ptr->read(file);
+            file.close();
+        }
+    }
     return conf;
 }
diff --git a/src/version.h.in b/src/version.h.in
index 44f10d9..231fb7c 100644
--- a/src/version.h.in
+++ b/src/version.h.in
@@ -1,3 +1,11 @@
+/*
+ * This file is part of smolbote. It's copyrighted by the contributors recorded
+ * in the version control history of the file, available from its original
+ * location: https://neueland.iserlohn-fortress.net/cgit/smolbote
+ *
+ * SPDX-License-Identifier: GPL-3.0
+ */
+
 #ifndef SMOLBOTE_VERSION_H
 #define SMOLBOTE_VERSION_H
 
-- 
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