Decouple save file path from config directory (closes #1025)

Signed-off-by: AnErrupTion <anerruption@disroot.org>

res/config.ini

@@ -348,8 +348,9 @@ path = /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 # If null, the keybind is disabled and isn't shown
 restart_key = F2
 
-# Save the current desktop and login as defaults, and load them on startup
-save = true
+# Absolute directory for the save file
+# If null, current desktop & login won't be saved nor loaded
+save_file_dir = $CONFIG_DIRECTORY/ly
 
 # Service name (set to ly to use the provided pam config file)
 service_name = ly

src/config/Config.zig

@@ -80,7 +80,7 @@ margin_box_v: u8 = 1,
 numlock: bool = false,
 path: ?[]const u8 = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
 restart_key: ?[]const u8 = "F2",
-save: bool = true,
+save_file_dir: ?[]const u8 = build_options.config_directory ++ "/ly",
 service_name: [:0]const u8 = "ly",
 session_log: ?[]const u8 = "ly-session.log",
 setup_cmd: []const u8 = build_options.config_directory ++ "/ly/setup.sh",

src/config/migrator.zig

@@ -2,6 +2,7 @@
 // Properties removed or changed since 0.6.0
 // Color codes interpreted differently since 1.1.0
 
+const build_options = @import("build_options");
 const std = @import("std");
 var temporary_allocator = std.heap.page_allocator;
 
@@ -194,6 +195,19 @@ pub fn configFieldHandler(_: std.mem.Allocator, field: ini.IniField) ?ini.IniFie
         return null;
     }
 
+    if (std.mem.eql(u8, field.key, "save")) {
+        // The option now uses a string for the file's parent directory
+        var mapped_field = field;
+
+        if (std.mem.eql(u8, field.value, "true")) {
+            mapped_field.value = build_options.config_directory ++ "/ly";
+        } else if (std.mem.eql(u8, field.value, "false")) {
+            mapped_field.value = "null";
+        }
+
+        return mapped_field;
+    }
+
     // TODO: Dearest Melpert,
     //      I pray this message finds you well, as daylight dwindles and the witching hour
     //      approaches, I find it more and more imperative as time continues that I place

src/main.zig

@@ -224,7 +224,7 @@ pub fn main(init: std.process.Init) !void {
     }
 
     // Load configuration file
-    defer if (state.config.save) {
+    defer if (state.config.save_file_dir != null) {
         state.allocator.free(state.save_path);
         state.allocator.free(state.old_save_path);
     };
@@ -266,8 +266,8 @@ pub fn main(init: std.process.Init) !void {
 
     state.lang = lang_parser.structure;
 
-    if (state.config.save) {
-        state.save_path = try std.Io.Dir.path.join(state.allocator, &[_][]const u8{ config_parent_path, "save.txt" });
+    if (state.config.save_file_dir) |dir| {
+        state.save_path = try std.Io.Dir.path.join(state.allocator, &[_][]const u8{ dir, "save.txt" });
         state.old_save_path = try std.Io.Dir.path.join(state.allocator, &[_][]const u8{ config_parent_path, "save.ini" });
     }
 
@@ -285,7 +285,7 @@ pub fn main(init: std.process.Init) !void {
     state.has_old_save = false;
     state.saved_username = null;
 
-    if (state.config.save) read_save_file: {
+    if (state.config.save_file_dir != null) read_save_file: {
         old_save_parser = migrator.tryMigrateIniSaveFile(state.allocator, state.io, state.old_save_path, &state.saved_users, usernames.items) catch break :read_save_file;
 
         // Don't read the new save file if the old one still exists
@@ -335,7 +335,7 @@ pub fn main(init: std.process.Init) !void {
 
     // If no save file previously existed, fill it up with all usernames
     // TODO: Add new username with existing save file
-    if (state.config.save and state.saved_users.user_list.items.len == 0) {
+    if (state.config.save_file_dir != null and state.saved_users.user_list.items.len == 0) {
         for (usernames.items) |user| {
             try state.saved_users.user_list.append(state.allocator, .{
                 .username = user,
@@ -1118,7 +1118,7 @@ pub fn main(init: std.process.Init) !void {
     // Skip if autologin is active to prevent overriding autologin session
     var default_input = state.config.default_input;
 
-    if (state.config.save and !state.is_autologin) {
+    if (state.config.save_file_dir != null and !state.is_autologin) {
         if (state.login_text) |box| {
             if (state.saved_username) |username| {
                 defer state.allocator.free(username);
@@ -1502,7 +1502,7 @@ fn authenticate(ptr: *anyopaque) !bool {
         try TerminalBuffer.presentBuffer();
     }
 
-    if (state.config.save) save_last_settings: {
+    if (state.config.save_file_dir != null) save_last_settings: {
         // It isn't worth cluttering the code with precise error
         // handling, so let's just report a generic error message,
         // that should be good enough for debugging anyway.