Deprecate modpack.txt and use modpack.conf instead (#7892)

* Deprecate modpack.txt and use modpack.conf instead

6 files changed, 75 insertions, 23 deletions

diff --git a/builtin/mainmenu/dlg_contentstore.lua b/builtin/mainmenu/dlg_contentstore.lua
index bab2c73f3..414c26853 100644
--- a/builtin/mainmenu/dlg_contentstore.lua
+++ b/builtin/mainmenu/dlg_contentstore.lua
@@ -76,10 +76,17 @@ local function start_install(calling_dialog, package)
 			if not path then
 				gamedata.errormessage = msg
 			else
+				core.log("action", "Installed package to " .. path)
+
 				local conf_path
 				local name_is_title = false
 				if result.package.type == "mod" then
-					conf_path = path .. DIR_DELIM .. "mod.conf"
+					local actual_type = pkgmgr.get_folder_type(path)
+					if actual_type.type == "modpack" then
+						conf_path = path .. DIR_DELIM .. "modpack.conf"
+					else
+						conf_path = path .. DIR_DELIM .. "mod.conf"
+					end
 				elseif result.package.type == "game" then
 					conf_path = path .. DIR_DELIM .. "game.conf"
 					name_is_title = true
diff --git a/builtin/mainmenu/pkgmgr.lua b/builtin/mainmenu/pkgmgr.lua
index ebd8ece6b..f6015ef72 100644
--- a/builtin/mainmenu/pkgmgr.lua
+++ b/builtin/mainmenu/pkgmgr.lua
@@ -25,27 +25,46 @@ function get_mods(path,retval,modpack)
 			local toadd = {}
 			retval[#retval + 1] = toadd
 
-			local mod_conf = Settings(prefix .. DIR_DELIM .. "mod.conf"):to_table()
-			if mod_conf.name then
-				name = mod_conf.name
+			-- Get config file
+			local mod_conf
+			local modpack_conf = io.open(prefix .. DIR_DELIM .. "modpack.conf")
+			if modpack_conf then
+				toadd.is_modpack = true
+				modpack_conf:close()
+
+				mod_conf = Settings(prefix .. DIR_DELIM .. "modpack.conf"):to_table()
+				if mod_conf.name then
+					name = mod_conf.name
+				end
+			else
+				mod_conf = Settings(prefix .. DIR_DELIM .. "mod.conf"):to_table()
+				if mod_conf.name then
+					name = mod_conf.name
+				end
 			end
 
+			-- Read from config
 			toadd.name = name
 			toadd.author = mod_conf.author
 			toadd.release = tonumber(mod_conf.release or "0")
 			toadd.path = prefix
 			toadd.type = "mod"
 
-			if modpack ~= nil and modpack ~= "" then
+			-- Check modpack.txt
+			--  Note: modpack.conf is already checked above
+			local modpackfile = io.open(prefix .. DIR_DELIM .. "modpack.txt")
+			if modpackfile then
+				modpackfile:close()
+				toadd.is_modpack = true
+			end
+
+			-- Deal with modpack contents
+			if modpack and modpack ~= "" then
 				toadd.modpack = modpack
-			else
-				local modpackfile = io.open(prefix .. DIR_DELIM .. "modpack.txt")
-				if modpackfile then
-					modpackfile:close()
-					toadd.type = "modpack"
-					toadd.is_modpack = true
-					get_mods(prefix, retval, name)
-				end
+			elseif toadd.is_modpack then
+				toadd.type = "modpack"
+				toadd.is_modpack = true
+				get_mods(prefix, retval, name)
 			end
 		end
 	end
@@ -114,6 +133,12 @@ function pkgmgr.get_folder_type(path)
 		return { type = "mod", path = path }
 	end
 
+	testfile = io.open(path .. DIR_DELIM .. "modpack.conf","r")
+	if testfile ~= nil then
+		testfile:close()
+		return { type = "modpack", path = path }
+	end
+
 	testfile = io.open(path .. DIR_DELIM .. "modpack.txt","r")
 	if testfile ~= nil then
 		testfile:close()
@@ -422,7 +447,7 @@ function pkgmgr.install_dir(type, path, basename, targetpath)
 		else
 			local clean_path = nil
 			if basename ~= nil then
-				clean_path = "mp_" .. basename
+				clean_path = basename
 			end
 			if not clean_path then
 				clean_path = get_last_folder(cleanup_path(basefolder.path))
diff --git a/doc/client_lua_api.txt b/doc/client_lua_api.txt
index 41560b983..f0e585355 100644
--- a/doc/client_lua_api.txt
+++ b/doc/client_lua_api.txt
@@ -68,8 +68,12 @@ Modpack support
 **NOTE: Not implemented yet.**
 
 Mods can be put in a subdirectory, if the parent directory, which otherwise
-should be a mod, contains a file named `modpack.txt`. This file shall be
-empty, except for lines starting with `#`, which are comments.
+should be a mod, contains a file named `modpack.conf`.
+The file is a key-value store of modpack details.
+
+* `name`: The modpack name.
+* `description`: Description of mod to be shown in the Mods tab of the main
+                 menu.
 
 Mod directory structure
 ------------------------
diff --git a/doc/lua_api.txt b/doc/lua_api.txt
index 0b08282a0..a8380e1cc 100644
--- a/doc/lua_api.txt
+++ b/doc/lua_api.txt
@@ -119,8 +119,14 @@ Modpacks
 --------
 
 Mods can be put in a subdirectory, if the parent directory, which otherwise
-should be a mod, contains a file named `modpack.txt`. This file shall be
-empty, except for lines starting with `#`, which are comments.
+should be a mod, contains a file named `modpack.conf`.
+The file is a key-value store of modpack details.
+
+* `name`: The modpack name.
+* `description`: Description of mod to be shown in the Mods tab of the main
+                 menu.
+
+Note: to support 0.4.x, please also create an empty modpack.txt file.
 
 Mod directory structure
 -----------------------
diff --git a/src/content/content.cpp b/src/content/content.cpp
index d7a2c9652..66ef83d42 100644
--- a/src/content/content.cpp
+++ b/src/content/content.cpp
@@ -41,6 +41,12 @@ ContentType getContentType(const ContentSpec &spec)
 		return ECT_MODPACK;
 	}
 
+	std::ifstream modpack2_is((spec.path + DIR_DELIM + "modpack.conf").c_str());
+	if (modpack2_is.good()) {
+		modpack2_is.close();
+		return ECT_MODPACK;
+	}
+
 	std::ifstream init_is((spec.path + DIR_DELIM + "init.lua").c_str());
 	if (init_is.good()) {
 		init_is.close();
@@ -73,7 +79,7 @@ void parseContentInfo(ContentSpec &spec)
 		break;
 	case ECT_MODPACK:
 		spec.type = "modpack";
-		conf_path = spec.path + DIR_DELIM + "mod.conf";
+		conf_path = spec.path + DIR_DELIM + "modpack.conf";
 		break;
 	case ECT_GAME:
 		spec.type = "game";
diff --git a/src/content/mods.cpp b/src/content/mods.cpp
index a3e706760..3cb168e19 100644
--- a/src/content/mods.cpp
+++ b/src/content/mods.cpp
@@ -66,12 +66,16 @@ void parseModContents(ModSpec &spec)
 
 	// Handle modpacks (defined by containing modpack.txt)
 	std::ifstream modpack_is((spec.path + DIR_DELIM + "modpack.txt").c_str());
-	if (modpack_is.good()) {    // a modpack, recursively get the mods in it
-		modpack_is.close(); // We don't actually need the file
+	std::ifstream modpack2_is((spec.path + DIR_DELIM + "modpack.conf").c_str());
+	if (modpack_is.good() || modpack2_is.good()) {
+		if (modpack_is.good())
+			modpack_is.close();
+
+		if (modpack2_is.good())
+			modpack2_is.close();
+
 		spec.is_modpack = true;
 		spec.modpack_content = getModsInPath(spec.path, true);
-		// modpacks have no dependencies; they are defined and
-		// tracked separately for each mod in the modpack
 
 	} else {
 		// Attempt to load dependencies from mod.conf