Load dependencies and description from mod.conf

builtin/mainmenu/modmgr.lua

@@ -271,34 +271,13 @@ function modmgr.render_modlist(render_list)
 end
 
 --------------------------------------------------------------------------------
-function modmgr.get_dependencies(modfolder)
-	local toadd_hard = ""
-	local toadd_soft = ""
-	if modfolder ~= nil then
-		local filename = modfolder ..
-					DIR_DELIM .. "depends.txt"
-
-		local hard_dependencies = {}
-		local soft_dependencies = {}
-		local dependencyfile = io.open(filename,"r")
-		if dependencyfile then
-			local dependency = dependencyfile:read("*l")
-			while dependency do
-				dependency = dependency:gsub("\r", "")
-				if string.sub(dependency, -1, -1) == "?" then
-					table.insert(soft_dependencies, string.sub(dependency, 1, -2))
-				else
-					table.insert(hard_dependencies, dependency)
-				end
-				dependency = dependencyfile:read()
-			end
-			dependencyfile:close()
-		end
-		toadd_hard = table.concat(hard_dependencies, ",")
-		toadd_soft = table.concat(soft_dependencies, ",")
+function modmgr.get_dependencies(path)
+	if path == nil then
+		return "", ""
 	end
 
-	return toadd_hard, toadd_soft
+	local info = core.get_mod_info(path)
+	return table.concat(info.depends, ","), table.concat(info.optional_depends, ",")
 end
 
 --------------------------------------------------------------------------------

builtin/mainmenu/tab_mods.lua

@@ -40,12 +40,11 @@ local function get_formspec(tabview, name, tabdata)
 	end
 
 	if selected_mod ~= nil then
-		local modscreenshot = nil
-
 		--check for screenshot beeing available
 		local screenshotfilename = selected_mod.path .. DIR_DELIM .. "screenshot.png"
-		local error = nil
-		local screenshotfile,error = io.open(screenshotfilename,"r")
+		local screenshotfile, error = io.open(screenshotfilename,"r")
+
+		local modscreenshot
 		if error == nil then
 			screenshotfile:close()
 			modscreenshot = screenshotfilename
@@ -55,33 +54,20 @@ local function get_formspec(tabview, name, tabdata)
 				modscreenshot = defaulttexturedir .. "no_screenshot.png"
 		end
 
-		retval = retval
-				.. "image[5.5,0;3,2;" .. core.formspec_escape(modscreenshot) .. "]"
-				.. "label[8.25,0.6;" .. selected_mod.name .. "]"
-
-		local descriptionlines = nil
-		error = nil
-		local descriptionfilename = selected_mod.path .. "description.txt"
-		local descriptionfile,error = io.open(descriptionfilename,"r")
-		if error == nil then
-			local descriptiontext = descriptionfile:read("*all")
-
-			descriptionlines = core.wrap_text(descriptiontext, 42, true)
-			descriptionfile:close()
-		else
-			descriptionlines = {}
-			descriptionlines[#descriptionlines + 1] = fgettext("No mod description available")
-		end
-
 		retval = retval ..
-			"label[5.5,1.7;".. fgettext("Mod Information:") .. "]" ..
-			"textlist[5.5,2.2;6.2,2.4;description;"
+				"image[5.5,0;3,2;" .. core.formspec_escape(modscreenshot) .. "]" ..
+				"label[8.25,0.6;" .. selected_mod.name .. "]" ..
+				"label[5.5,1.7;".. fgettext("Mod Information:") .. "]" ..
+				"textlist[5.5,2.2;6.2,2.4;description;"
 
-		for i=1,#descriptionlines,1 do
+
+		local info = core.get_mod_info(selected_mod.path)
+		local desc = info.description or fgettext("No mod description available")
+		local descriptionlines = core.wrap_text(desc, 42, true)
+		for i = 1, #descriptionlines do
 			retval = retval .. core.formspec_escape(descriptionlines[i]) .. ","
 		end
 
-
 		if selected_mod.is_modpack then
 			retval = retval .. ";0]" ..
 				"button[9.9,4.65;2,1;btn_mod_mgr_rename_modpack;" ..
@@ -90,7 +76,8 @@ local function get_formspec(tabview, name, tabdata)
 				.. fgettext("Uninstall Selected Modpack") .. "]"
 		else
 			--show dependencies
-			local toadd_hard, toadd_soft = modmgr.get_dependencies(selected_mod.path)
+			local toadd_hard = table.concat(info.depends, ",")
+			local toadd_soft = table.concat(info.optional_depends, ",")
 			if toadd_hard == "" and toadd_soft == "" then
 				retval = retval .. "," .. fgettext("No dependencies.")
 			else

doc/lua_api.txt

@@ -130,9 +130,8 @@ Mod directory structure
 
     mods
     |-- modname
-    |   |-- depends.txt
+    |   |-- mod.conf
     |   |-- screenshot.png
-    |   |-- description.txt
     |   |-- settingtypes.txt
     |   |-- init.lua
     |   |-- models
@@ -145,12 +144,32 @@ Mod directory structure
     |   `-- <custom data>
     `-- another
 
-
 ### modname
 The location of this directory can be fetched by using
 `minetest.get_modpath(modname)`.
 
+### mod.conf
+A key-value store of mod details.
+
+* `name` - the mod name. Allows Minetest to determine the mod name even if the
+           folder is wrongly named.
+* `description` - Description of mod to be shown in the Mods tab of the mainmenu.
+* `depends` - A comma separated list of dependencies. These are mods that must
+              be loaded before this mod.
+* `optional_depends` - A comma separated list of optional dependencies.
+                       Like a dependency, but no error if the mod doesn't exist.
+
+Note: to support 0.4.x, please also provide depends.txt.
+
+### `screenshot.png`
+A screenshot shown in the mod manager within the main menu. It should
+have an aspect ratio of 3:2 and a minimum size of 300×200 pixels.
+
 ### `depends.txt`
+**Deprecated:** you should use mod.conf instead.
+
+This file is used if there are no dependencies in mod.conf.
+
 List of mods that have to be loaded before loading this mod.
 
 A single line contains a single modname.
@@ -159,11 +178,11 @@ Optional dependencies can be defined by appending a question mark
 to a single modname. This means that if the specified mod
 is missing, it does not prevent this mod from being loaded.
 
-### `screenshot.png`
-A screenshot shown in the mod manager within the main menu. It should
-have an aspect ratio of 3:2 and a minimum size of 300×200 pixels.
-
 ### `description.txt`
+**Deprecated:** you should use mod.conf instead.
+
+This file is used if there is no description in mod.conf.
+
 A file containing a description to be shown in the Mods tab of the mainmenu.
 
 ### `settingtypes.txt`

doc/menu_lua_api.txt

@@ -111,7 +111,7 @@ core.get_screen_info()
 	window_height   = <current window height>
 	}
 
-Games:
+Packages:
 core.get_game(index)
 ^ returns {
 	id               = <id>,
@@ -125,6 +125,15 @@ core.get_game(index)
 core.get_games() -> table of all games in upper format (possible in async calls)
 core.get_mapgen_names([include_hidden=false]) -> table of map generator algorithms
     registered in the core (possible in async calls)
+core.get_mod_info(path)
+^ returns  {
+	name             = "name of mod",
+	type             = "mod" or "modpack",
+	description      = "description",
+	path             = "path/to/mod",
+	depends          = {"mod", "names"},
+	optional_depends = {"mod", "names"},
+}
 
 Favorites:
 core.get_favorites(location) -> list of favorites (possible in async calls)

games/minimal/mods/bucket/mod.conf

@@ -0,0 +1,3 @@
+name = bucket
+description = Minimal bucket to place and pick up liquids
+depends = default

games/minimal/mods/default/mod.conf

@@ -0,0 +1,2 @@
+name = default
+description = Minimal default, adds basic nodes

games/minimal/mods/experimental/mod.conf

@@ -0,0 +1,3 @@
+name = experimental
+description = Minimal mod to test features
+depends = default, stairs

games/minimal/mods/give_initial_stuff/mod.conf

@@ -0,0 +1,3 @@
+name = give_initial_stuff
+description = Gives items to players on join
+depends = default

games/minimal/mods/legacy/mod.conf

@@ -0,0 +1,3 @@
+name = legacy
+description = Aliases allowing support for 0.3.x worlds
+depends = default

games/minimal/mods/stairs/mod.conf

@@ -0,0 +1,3 @@
+name = stairs
+description = Adds stairs and slabs
+depends = default

games/minimal/mods/test/mod.conf

@@ -0,0 +1,2 @@
+name = test
+description = Adds unit tests for the engine

src/mods.cpp

@@ -20,6 +20,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <cctype>
 #include <fstream>
 #include <json/json.h>
+#include <algorithm>
 #include "mods.h"
 #include "filesys.h"
 #include "log.h"
@@ -28,14 +29,13 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "porting.h"
 #include "convert_json.h"
 
-static bool parseDependsLine(std::istream &is,
-		std::string &dep, std::set<char> &symbols)
+bool parseDependsString(std::string &dep,
+		std::unordered_set<char> &symbols)
 {
-	std::getline(is, dep);
 	dep = trim(dep);
 	symbols.clear();
 	size_t pos = dep.size();
-	while(pos > 0 && !string_allowed(dep.substr(pos-1, 1), MODNAME_ALLOWED_CHARS)){
+	while (pos > 0 && !string_allowed(dep.substr(pos-1, 1), MODNAME_ALLOWED_CHARS)) {
 		// last character is a symbol, not part of the modname
 		symbols.insert(dep[pos-1]);
 		--pos;
@@ -60,28 +60,66 @@ 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
+	if (modpack_is.good()) { // a modpack, recursively get the mods in it
 		modpack_is.close(); // We don't actually need the file
 		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{ // not a modpack, parse the dependencies
-		std::ifstream is((spec.path+DIR_DELIM+"depends.txt").c_str());
-		while(is.good()){
-			std::string dep;
-			std::set<char> symbols;
-			if(parseDependsLine(is, dep, symbols)){
-				if(symbols.count('?') != 0){
-					spec.optdepends.insert(dep);
-				}
-				else{
-					spec.depends.insert(dep);
+
+	} else {
+		// Attempt to load dependencies from mod.conf
+		bool mod_conf_has_depends = false;
+		if (info.exists("depends")) {
+			mod_conf_has_depends = true;
+			std::string dep = info.get("depends");
+			dep.erase(std::remove_if(dep.begin(), dep.end(),
+					static_cast<int(*)(int)>(&std::isspace)), dep.end());
+			for (const auto &dependency : str_split(dep, ',')) {
+				spec.depends.insert(dependency);
+			}
+		}
+
+		if (info.exists("optional_depends")) {
+			mod_conf_has_depends = true;
+			std::string dep = info.get("optional_depends");
+			dep.erase(std::remove_if(dep.begin(), dep.end(),
+					static_cast<int(*)(int)>(&std::isspace)), dep.end());
+			for (const auto &dependency : str_split(dep, ',')) {
+				spec.optdepends.insert(dependency);
+			}
+		}
+
+		// Fallback to depends.txt
+		if (!mod_conf_has_depends) {
+			std::vector<std::string> dependencies;
+
+			std::ifstream is((spec.path + DIR_DELIM + "depends.txt").c_str());
+			while (is.good()) {
+				std::string dep;
+				std::getline(is, dep);
+				dependencies.push_back(dep);
+			}
+
+			for (auto &dependency : dependencies) {
+				std::unordered_set<char> symbols;
+				if (parseDependsString(dependency, symbols)) {
+					if (symbols.count('?') != 0) {
+						spec.optdepends.insert(dependency);
+					} else {
+						spec.depends.insert(dependency);
+					}
 				}
 			}
 		}
+
+		if (info.exists("description")) {
+			spec.desc = info.get("description");
+		} else {
+			std::ifstream is((spec.path + DIR_DELIM + "description.txt").c_str());
+			spec.desc = std::string((std::istreambuf_iterator<char>(is)),
+					std::istreambuf_iterator<char>());
+		}
 	}
 }
 

src/mods.h

@@ -37,13 +37,16 @@ struct ModSpec
 {
 	std::string name;
 	std::string path;
+	std::string desc;
+
 	//if normal mod:
 	std::unordered_set<std::string> depends;
 	std::unordered_set<std::string> optdepends;
 	std::unordered_set<std::string> unsatisfied_depends;
 
 	bool part_of_modpack = false;
 	bool is_modpack = false;
+
 	// if modpack:
 	std::map<std::string,ModSpec> modpack_content;
 	ModSpec(const std::string &name_ = "", const std::string &path_ = ""):