builtin/mainmenu/pkgmgr.lua

   1 --Minetest
   2 --Copyright (C) 2013 sapier
   3 --
   4 --This program is free software; you can redistribute it and/or modify
   5 --it under the terms of the GNU Lesser General Public License as published by
   6 --the Free Software Foundation; either version 2.1 of the License, or
   7 --(at your option) any later version.
   8 --
   9 --This program is distributed in the hope that it will be useful,
  10 --but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 --MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 --GNU Lesser General Public License for more details.
  13 --
  14 --You should have received a copy of the GNU Lesser General Public License along
  15 --with this program; if not, write to the Free Software Foundation, Inc.,
  16 --51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17
  18 --------------------------------------------------------------------------------
  19 local function get_last_folder(text,count)
  20         local parts = text:split(DIR_DELIM)
  21
  22         if count == nil then
  23                 return parts[#parts]
  24         end
  25
  26         local retval = ""
  27         for i=1,count,1 do
  28                 retval = retval .. parts[#parts - (count-i)] .. DIR_DELIM
  29         end
  30
  31         return retval
  32 end
  33
  34 local function cleanup_path(temppath)
  35
  36         local parts = temppath:split("-")
  37         temppath = ""
  38         for i=1,#parts,1 do
  39                 if temppath ~= "" then
  40                         temppath = temppath .. "_"
  41                 end
  42                 temppath = temppath .. parts[i]
  43         end
  44
  45         parts = temppath:split(".")
  46         temppath = ""
  47         for i=1,#parts,1 do
  48                 if temppath ~= "" then
  49                         temppath = temppath .. "_"
  50                 end
  51                 temppath = temppath .. parts[i]
  52         end
  53
  54         parts = temppath:split("'")
  55         temppath = ""
  56         for i=1,#parts,1 do
  57                 if temppath ~= "" then
  58                         temppath = temppath .. ""
  59                 end
  60                 temppath = temppath .. parts[i]
  61         end
  62
  63         parts = temppath:split(" ")
  64         temppath = ""
  65         for i=1,#parts,1 do
  66                 if temppath ~= "" then
  67                         temppath = temppath
  68                 end
  69                 temppath = temppath .. parts[i]
  70         end
  71
  72         return temppath
  73 end
  74
  75 local function load_texture_packs(txtpath, retval)
  76         local list = core.get_dir_list(txtpath, true)
  77         local current_texture_path = core.settings:get("texture_path")
  78
  79         for _, item in ipairs(list) do
  80                 if item ~= "base" then
  81                         local path = txtpath .. DIR_DELIM .. item .. DIR_DELIM
  82                         local conf = Settings(path .. "texture_pack.conf")
  83                         local enabled = path == current_texture_path
  84
  85                         local title = conf:get("title") or item
  86
  87                         -- list_* is only used if non-nil, else the regular versions are used.
  88                         retval[#retval + 1] = {
  89                                 name = item,
  90                                 title = title,
  91                                 list_name = enabled and fgettext("$1 (Enabled)", item) or nil,
  92                                 list_title = enabled and fgettext("$1 (Enabled)", title) or nil,
  93                                 author = conf:get("author"),
  94                                 release = tonumber(conf:get("release")) or 0,
  95                                 type = "txp",
  96                                 path = path,
  97                                 enabled = enabled,
  98                         }
  99                 end
 100         end
 101 end
 102
 103 function get_mods(path, virtual_path, retval, modpack)
 104         local mods = core.get_dir_list(path, true)
 105
 106         for _, name in ipairs(mods) do
 107                 if name:sub(1, 1) ~= "." then
 108                         local mod_path = path .. DIR_DELIM .. name
 109                         local mod_virtual_path = virtual_path .. "/" .. name
 110                         local toadd = {
 111                                 dir_name = name,
 112                                 parent_dir = path,
 113                         }
 114                         retval[#retval + 1] = toadd
 115
 116                         -- Get config file
 117                         local mod_conf
 118                         local modpack_conf = io.open(mod_path .. DIR_DELIM .. "modpack.conf")
 119                         if modpack_conf then
 120                                 toadd.is_modpack = true
 121                                 modpack_conf:close()
 122
 123                                 mod_conf = Settings(mod_path .. DIR_DELIM .. "modpack.conf"):to_table()
 124                                 if mod_conf.name then
 125                                         name = mod_conf.name
 126                                         toadd.is_name_explicit = true
 127                                 end
 128                         else
 129                                 mod_conf = Settings(mod_path .. DIR_DELIM .. "mod.conf"):to_table()
 130                                 if mod_conf.name then
 131                                         name = mod_conf.name
 132                                         toadd.is_name_explicit = true
 133                                 end
 134                         end
 135
 136                         -- Read from config
 137                         toadd.name = name
 138                         toadd.title = mod_conf.title
 139                         toadd.author = mod_conf.author
 140                         toadd.release = tonumber(mod_conf.release) or 0
 141                         toadd.path = mod_path
 142                         toadd.virtual_path = mod_virtual_path
 143                         toadd.type = "mod"
 144
 145                         -- Check modpack.txt
 146                         -- Note: modpack.conf is already checked above
 147                         local modpackfile = io.open(mod_path .. DIR_DELIM .. "modpack.txt")
 148                         if modpackfile then
 149                                 modpackfile:close()
 150                                 toadd.is_modpack = true
 151                         end
 152
 153                         -- Deal with modpack contents
 154                         if modpack and modpack ~= "" then
 155                                 toadd.modpack = modpack
 156                         elseif toadd.is_modpack then
 157                                 toadd.type = "modpack"
 158                                 toadd.is_modpack = true
 159                                 get_mods(mod_path, mod_virtual_path, retval, name)
 160                         end
 161                 end
 162         end
 163 end
 164
 165 --modmanager implementation
 166 pkgmgr = {}
 167
 168 function pkgmgr.get_texture_packs()
 169         local txtpath = core.get_texturepath()
 170         local txtpath_system = core.get_texturepath_share()
 171         local retval = {}
 172
 173         load_texture_packs(txtpath, retval)
 174         -- on portable versions these two paths coincide. It avoids loading the path twice
 175         if txtpath ~= txtpath_system then
 176                 load_texture_packs(txtpath_system, retval)
 177         end
 178
 179         table.sort(retval, function(a, b)
 180                 return a.name > b.name
 181         end)
 182
 183         return retval
 184 end
 185
 186 --------------------------------------------------------------------------------
 187 function pkgmgr.get_folder_type(path)
 188         local testfile = io.open(path .. DIR_DELIM .. "init.lua","r")
 189         if testfile ~= nil then
 190                 testfile:close()
 191                 return { type = "mod", path = path }
 192         end
 193
 194         testfile = io.open(path .. DIR_DELIM .. "modpack.conf","r")
 195         if testfile ~= nil then
 196                 testfile:close()
 197                 return { type = "modpack", path = path }
 198         end
 199
 200         testfile = io.open(path .. DIR_DELIM .. "modpack.txt","r")
 201         if testfile ~= nil then
 202                 testfile:close()
 203                 return { type = "modpack", path = path }
 204         end
 205
 206         testfile = io.open(path .. DIR_DELIM .. "game.conf","r")
 207         if testfile ~= nil then
 208                 testfile:close()
 209                 return { type = "game", path = path }
 210         end
 211
 212         testfile = io.open(path .. DIR_DELIM .. "texture_pack.conf","r")
 213         if testfile ~= nil then
 214                 testfile:close()
 215                 return { type = "txp", path = path }
 216         end
 217
 218         return nil
 219 end
 220
 221 -------------------------------------------------------------------------------
 222 function pkgmgr.get_base_folder(temppath)
 223         if temppath == nil then
 224                 return { type = "invalid", path = "" }
 225         end
 226
 227         local ret = pkgmgr.get_folder_type(temppath)
 228         if ret then
 229                 return ret
 230         end
 231
 232         local subdirs = core.get_dir_list(temppath, true)
 233         if #subdirs == 1 then
 234                 ret = pkgmgr.get_folder_type(temppath .. DIR_DELIM .. subdirs[1])
 235                 if ret then
 236                         return ret
 237                 else
 238                         return { type = "invalid", path = temppath .. DIR_DELIM .. subdirs[1] }
 239                 end
 240         end
 241
 242         return nil
 243 end
 244
 245 --------------------------------------------------------------------------------
 246 function pkgmgr.isValidModname(modpath)
 247         if modpath:find("-") ~= nil then
 248                 return false
 249         end
 250
 251         return true
 252 end
 253
 254 --------------------------------------------------------------------------------
 255 function pkgmgr.parse_register_line(line)
 256         local pos1 = line:find("\"")
 257         local pos2 = nil
 258         if pos1 ~= nil then
 259                 pos2 = line:find("\"",pos1+1)
 260         end
 261
 262         if pos1 ~= nil and pos2 ~= nil then
 263                 local item = line:sub(pos1+1,pos2-1)
 264
 265                 if item ~= nil and
 266                         item ~= "" then
 267                         local pos3 = item:find(":")
 268
 269                         if pos3 ~= nil then
 270                                 local retval = item:sub(1,pos3-1)
 271                                 if retval ~= nil and
 272                                         retval ~= "" then
 273                                         return retval
 274                                 end
 275                         end
 276                 end
 277         end
 278         return nil
 279 end
 280
 281 --------------------------------------------------------------------------------
 282 function pkgmgr.parse_dofile_line(modpath,line)
 283         local pos1 = line:find("\"")
 284         local pos2 = nil
 285         if pos1 ~= nil then
 286                 pos2 = line:find("\"",pos1+1)
 287         end
 288
 289         if pos1 ~= nil and pos2 ~= nil then
 290                 local filename = line:sub(pos1+1,pos2-1)
 291
 292                 if filename ~= nil and
 293                         filename ~= "" and
 294                         filename:find(".lua") then
 295                         return pkgmgr.identify_modname(modpath,filename)
 296                 end
 297         end
 298         return nil
 299 end
 300
 301 --------------------------------------------------------------------------------
 302 function pkgmgr.identify_modname(modpath,filename)
 303         local testfile = io.open(modpath .. DIR_DELIM .. filename,"r")
 304         if testfile ~= nil then
 305                 local line = testfile:read()
 306
 307                 while line~= nil do
 308                         local modname = nil
 309
 310                         if line:find("minetest.register_tool") then
 311                                 modname = pkgmgr.parse_register_line(line)
 312                         end
 313
 314                         if line:find("minetest.register_craftitem") then
 315                                 modname = pkgmgr.parse_register_line(line)
 316                         end
 317
 318
 319                         if line:find("minetest.register_node") then
 320                                 modname = pkgmgr.parse_register_line(line)
 321                         end
 322
 323                         if line:find("dofile") then
 324                                 modname = pkgmgr.parse_dofile_line(modpath,line)
 325                         end
 326
 327                         if modname ~= nil then
 328                                 testfile:close()
 329                                 return modname
 330                         end
 331
 332                         line = testfile:read()
 333                 end
 334                 testfile:close()
 335         end
 336
 337         return nil
 338 end
 339 --------------------------------------------------------------------------------
 340 function pkgmgr.render_packagelist(render_list, use_technical_names)
 341         if not render_list then
 342                 if not pkgmgr.global_mods then
 343                         pkgmgr.refresh_globals()
 344                 end
 345                 render_list = pkgmgr.global_mods
 346         end
 347
 348         local list = render_list:get_list()
 349         local retval = {}
 350         for i, v in ipairs(list) do
 351                 local color = ""
 352                 if v.is_modpack then
 353                         local rawlist = render_list:get_raw_list()
 354                         color = mt_color_dark_green
 355
 356                         for j = 1, #rawlist, 1 do
 357                                 if rawlist[j].modpack == list[i].name and
 358                                                 not rawlist[j].enabled then
 359                                         -- Modpack not entirely enabled so showing as grey
 360                                         color = mt_color_grey
 361                                         break
 362                                 end
 363                         end
 364                 elseif v.is_game_content or v.type == "game" then
 365                         color = mt_color_blue
 366                 elseif v.enabled or v.type == "txp" then
 367                         color = mt_color_green
 368                 end
 369
 370                 retval[#retval + 1] = color
 371                 if v.modpack ~= nil or v.loc == "game" then
 372                         retval[#retval + 1] = "1"
 373                 else
 374                         retval[#retval + 1] = "0"
 375                 end
 376
 377                 if use_technical_names then
 378                         retval[#retval + 1] = core.formspec_escape(v.list_name or v.name)
 379                 else
 380                         retval[#retval + 1] = core.formspec_escape(v.list_title or v.list_name or v.title or v.name)
 381                 end
 382         end
 383
 384         return table.concat(retval, ",")
 385 end
 386
 387 --------------------------------------------------------------------------------
 388 function pkgmgr.get_dependencies(path)
 389         if path == nil then
 390                 return {}, {}
 391         end
 392
 393         local info = core.get_content_info(path)
 394         return info.depends or {}, info.optional_depends or {}
 395 end
 396
 397 ----------- tests whether all of the mods in the modpack are enabled -----------
 398 function pkgmgr.is_modpack_entirely_enabled(data, name)
 399         local rawlist = data.list:get_raw_list()
 400         for j = 1, #rawlist do
 401                 if rawlist[j].modpack == name and not rawlist[j].enabled then
 402                         return false
 403                 end
 404         end
 405         return true
 406 end
 407
 408 local function disable_all_by_name(list, name, except)
 409         for i=1, #list do
 410                 if list[i].name == name and list[i] ~= except then
 411                         list[i].enabled = false
 412                 end
 413         end
 414 end
 415
 416 ---------- toggles or en/disables a mod or modpack and its dependencies --------
 417 local function toggle_mod_or_modpack(list, toggled_mods, enabled_mods, toset, mod)
 418         if not mod.is_modpack then
 419                 -- Toggle or en/disable the mod
 420                 if toset == nil then
 421                         toset = not mod.enabled
 422                 end
 423                 if mod.enabled ~= toset then
 424                         toggled_mods[#toggled_mods+1] = mod.name
 425                 end
 426                 if toset then
 427                         -- Mark this mod for recursive dependency traversal
 428                         enabled_mods[mod.name] = true
 429
 430                         -- Disable other mods with the same name
 431                         disable_all_by_name(list, mod.name, mod)
 432                 end
 433                 mod.enabled = toset
 434         else
 435                 -- Toggle or en/disable every mod in the modpack,
 436                 -- interleaved unsupported
 437                 for i = 1, #list do
 438                         if list[i].modpack == mod.name then
 439                                 toggle_mod_or_modpack(list, toggled_mods, enabled_mods, toset, list[i])
 440                         end
 441                 end
 442         end
 443 end
 444
 445 function pkgmgr.enable_mod(this, toset)
 446         local list = this.data.list:get_list()
 447         local mod = list[this.data.selected_mod]
 448
 449         -- Game mods can't be enabled or disabled
 450         if mod.is_game_content then
 451                 return
 452         end
 453
 454         local toggled_mods = {}
 455         local enabled_mods = {}
 456         toggle_mod_or_modpack(list, toggled_mods, enabled_mods, toset, mod)
 457
 458         if next(enabled_mods) == nil then
 459                 -- Mod(s) were disabled, so no dependencies need to be enabled
 460                 table.sort(toggled_mods)
 461                 core.log("info", "Following mods were disabled: " ..
 462                         table.concat(toggled_mods, ", "))
 463                 return
 464         end
 465
 466         -- Enable mods' depends after activation
 467
 468         -- Make a list of mod ids indexed by their names. Among mods with the
 469         -- same name, enabled mods take precedence, after which game mods take
 470         -- precedence, being last in the mod list.
 471         local mod_ids = {}
 472         for id, mod2 in pairs(list) do
 473                 if mod2.type == "mod" and not mod2.is_modpack then
 474                         local prev_id = mod_ids[mod2.name]
 475                         if not prev_id or not list[prev_id].enabled then
 476                                 mod_ids[mod2.name] = id
 477                         end
 478                 end
 479         end
 480
 481         -- to_enable is used as a DFS stack with sp as stack pointer
 482         local to_enable = {}
 483         local sp = 0
 484         for name in pairs(enabled_mods) do
 485                 local depends = pkgmgr.get_dependencies(list[mod_ids[name]].path)
 486                 for i = 1, #depends do
 487                         local dependency_name = depends[i]
 488                         if not enabled_mods[dependency_name] then
 489                                 sp = sp+1
 490                                 to_enable[sp] = dependency_name
 491                         end
 492                 end
 493         end
 494
 495         -- If sp is 0, every dependency is already activated
 496         while sp > 0 do
 497                 local name = to_enable[sp]
 498                 sp = sp-1
 499
 500                 if not enabled_mods[name] then
 501                         enabled_mods[name] = true
 502                         local mod_to_enable = list[mod_ids[name]]
 503                         if not mod_to_enable then
 504                                 core.log("warning", "Mod dependency \"" .. name ..
 505                                         "\" not found!")
 506                         else
 507                                 if not mod_to_enable.enabled then
 508                                         mod_to_enable.enabled = true
 509                                         toggled_mods[#toggled_mods+1] = mod_to_enable.name
 510                                 end
 511                                 -- Push the dependencies of the dependency onto the stack
 512                                 local depends = pkgmgr.get_dependencies(mod_to_enable.path)
 513                                 for i = 1, #depends do
 514                                         if not enabled_mods[depends[i]] then
 515                                                 sp = sp+1
 516                                                 to_enable[sp] = depends[i]
 517                                         end
 518                                 end
 519                         end
 520                 end
 521         end
 522
 523         -- Log the list of enabled mods
 524         table.sort(toggled_mods)
 525         core.log("info", "Following mods were enabled: " ..
 526                 table.concat(toggled_mods, ", "))
 527 end
 528
 529 --------------------------------------------------------------------------------
 530 function pkgmgr.get_worldconfig(worldpath)
 531         local filename = worldpath ..
 532                                 DIR_DELIM .. "world.mt"
 533
 534         local worldfile = Settings(filename)
 535
 536         local worldconfig = {}
 537         worldconfig.global_mods = {}
 538         worldconfig.game_mods = {}
 539
 540         for key,value in pairs(worldfile:to_table()) do
 541                 if key == "gameid" then
 542                         worldconfig.id = value
 543                 elseif key:sub(0, 9) == "load_mod_" then
 544                         -- Compatibility: Check against "nil" which was erroneously used
 545                         -- as value for fresh configured worlds
 546                         worldconfig.global_mods[key] = value ~= "false" and value ~= "nil"
 547                                 and value
 548                 else
 549                         worldconfig[key] = value
 550                 end
 551         end
 552
 553         --read gamemods
 554         local gamespec = pkgmgr.find_by_gameid(worldconfig.id)
 555         pkgmgr.get_game_mods(gamespec, worldconfig.game_mods)
 556
 557         return worldconfig
 558 end
 559
 560 --------------------------------------------------------------------------------
 561 function pkgmgr.install_dir(type, path, basename, targetpath)
 562         local basefolder = pkgmgr.get_base_folder(path)
 563
 564         -- There's no good way to detect a texture pack, so let's just assume
 565         -- it's correct for now.
 566         if type == "txp" then
 567                 if basefolder and basefolder.type ~= "invalid" and basefolder.type ~= "txp" then
 568                         return nil, fgettext("Unable to install a $1 as a texture pack", basefolder.type)
 569                 end
 570
 571                 local from = basefolder and basefolder.path or path
 572                 if targetpath then
 573                         core.delete_dir(targetpath)
 574                 else
 575                         targetpath = core.get_texturepath() .. DIR_DELIM .. basename
 576                 end
 577                 if not core.copy_dir(from, targetpath, false) then
 578                         return nil,
 579                                 fgettext("Failed to install $1 to $2", basename, targetpath)
 580                 end
 581                 return targetpath, nil
 582
 583         elseif not basefolder then
 584                 return nil, fgettext("Unable to find a valid mod or modpack")
 585         end
 586
 587         --
 588         -- Get destination
 589         --
 590         if basefolder.type == "modpack" then
 591                 if type ~= "mod" then
 592                         return nil, fgettext("Unable to install a modpack as a $1", type)
 593                 end
 594
 595                 -- Get destination name for modpack
 596                 if targetpath then
 597                         core.delete_dir(targetpath)
 598                 else
 599                         local clean_path = nil
 600                         if basename ~= nil then
 601                                 clean_path = basename
 602                         end
 603                         if not clean_path then
 604                                 clean_path = get_last_folder(cleanup_path(basefolder.path))
 605                         end
 606                         if clean_path then
 607                                 targetpath = core.get_modpath() .. DIR_DELIM .. clean_path
 608                         else
 609                                 return nil,
 610                                         fgettext("Install Mod: Unable to find suitable folder name for modpack $1",
 611                                         path)
 612                         end
 613                 end
 614         elseif basefolder.type == "mod" then
 615                 if type ~= "mod" then
 616                         return nil, fgettext("Unable to install a mod as a $1", type)
 617                 end
 618
 619                 if targetpath then
 620                         core.delete_dir(targetpath)
 621                 else
 622                         local targetfolder = basename
 623                         if targetfolder == nil then
 624                                 targetfolder = pkgmgr.identify_modname(basefolder.path, "init.lua")
 625                         end
 626
 627                         -- If heuristic failed try to use current foldername
 628                         if targetfolder == nil then
 629                                 targetfolder = get_last_folder(basefolder.path)
 630                         end
 631
 632                         if targetfolder ~= nil and pkgmgr.isValidModname(targetfolder) then
 633                                 targetpath = core.get_modpath() .. DIR_DELIM .. targetfolder
 634                         else
 635                                 return nil, fgettext("Install Mod: Unable to find real mod name for: $1", path)
 636                         end
 637                 end
 638
 639         elseif basefolder.type == "game" then
 640                 if type ~= "game" then
 641                         return nil, fgettext("Unable to install a game as a $1", type)
 642                 end
 643
 644                 if targetpath then
 645                         core.delete_dir(targetpath)
 646                 else
 647                         targetpath = core.get_gamepath() .. DIR_DELIM .. basename
 648                 end
 649         end
 650
 651         -- Copy it
 652         if not core.copy_dir(basefolder.path, targetpath, false) then
 653                 return nil,
 654                         fgettext("Failed to install $1 to $2", basename, targetpath)
 655         end
 656
 657         if basefolder.type == "game" then
 658                 pkgmgr.update_gamelist()
 659         else
 660                 pkgmgr.refresh_globals()
 661         end
 662
 663         return targetpath, nil
 664 end
 665
 666 --------------------------------------------------------------------------------
 667 function pkgmgr.preparemodlist(data)
 668         local retval = {}
 669
 670         local global_mods = {}
 671         local game_mods = {}
 672
 673         --read global mods
 674         local modpaths = core.get_modpaths()
 675         for key, modpath in pairs(modpaths) do
 676                 get_mods(modpath, key, global_mods)
 677         end
 678
 679         for i=1,#global_mods,1 do
 680                 global_mods[i].type = "mod"
 681                 global_mods[i].loc = "global"
 682                 global_mods[i].enabled = false
 683                 retval[#retval + 1] = global_mods[i]
 684         end
 685
 686         --read game mods
 687         local gamespec = pkgmgr.find_by_gameid(data.gameid)
 688         pkgmgr.get_game_mods(gamespec, game_mods)
 689
 690         if #game_mods > 0 then
 691                 -- Add title
 692                 retval[#retval + 1] = {
 693                         type = "game",
 694                         is_game_content = true,
 695                         name = fgettext("$1 mods", gamespec.name),
 696                         path = gamespec.path
 697                 }
 698         end
 699
 700         for i=1,#game_mods,1 do
 701                 game_mods[i].type = "mod"
 702                 game_mods[i].loc = "game"
 703                 game_mods[i].is_game_content = true
 704                 retval[#retval + 1] = game_mods[i]
 705         end
 706
 707         if data.worldpath == nil then
 708                 return retval
 709         end
 710
 711         --read world mod configuration
 712         local filename = data.worldpath ..
 713                                 DIR_DELIM .. "world.mt"
 714
 715         local worldfile = Settings(filename)
 716         for key, value in pairs(worldfile:to_table()) do
 717                 if key:sub(1, 9) == "load_mod_" then
 718                         key = key:sub(10)
 719                         local mod_found = false
 720
 721                         local fallback_found = false
 722                         local fallback_mod = nil
 723
 724                         for i=1, #retval do
 725                                 if retval[i].name == key and
 726                                                 not retval[i].is_modpack then
 727                                         if core.is_yes(value) or retval[i].virtual_path == value then
 728                                                 retval[i].enabled = true
 729                                                 mod_found = true
 730                                                 break
 731                                         elseif fallback_found then
 732                                                 -- Only allow fallback if only one mod matches
 733                                                 fallback_mod = nil
 734                                         else
 735                                                 fallback_found = true
 736                                                 fallback_mod = retval[i]
 737                                         end
 738                                 end
 739                         end
 740
 741                         if not mod_found then
 742                                 if fallback_mod and value:find("/") then
 743                                         fallback_mod.enabled = true
 744                                 else
 745                                         core.log("info", "Mod: " .. key .. " " .. dump(value) .. " but not found")
 746                                 end
 747                         end
 748                 end
 749         end
 750
 751         return retval
 752 end
 753
 754 function pkgmgr.compare_package(a, b)
 755         return a and b and a.name == b.name and a.path == b.path
 756 end
 757
 758 --------------------------------------------------------------------------------
 759 function pkgmgr.comparemod(elem1,elem2)
 760         if elem1 == nil or elem2 == nil then
 761                 return false
 762         end
 763         if elem1.name ~= elem2.name then
 764                 return false
 765         end
 766         if elem1.is_modpack ~= elem2.is_modpack then
 767                 return false
 768         end
 769         if elem1.type ~= elem2.type then
 770                 return false
 771         end
 772         if elem1.modpack ~= elem2.modpack then
 773                 return false
 774         end
 775
 776         if elem1.path ~= elem2.path then
 777                 return false
 778         end
 779
 780         return true
 781 end
 782
 783 --------------------------------------------------------------------------------
 784 function pkgmgr.mod_exists(basename)
 785
 786         if pkgmgr.global_mods == nil then
 787                 pkgmgr.refresh_globals()
 788         end
 789
 790         if pkgmgr.global_mods:raw_index_by_uid(basename) > 0 then
 791                 return true
 792         end
 793
 794         return false
 795 end
 796
 797 --------------------------------------------------------------------------------
 798 function pkgmgr.get_global_mod(idx)
 799
 800         if pkgmgr.global_mods == nil then
 801                 return nil
 802         end
 803
 804         if idx == nil or idx < 1 or
 805                 idx > pkgmgr.global_mods:size() then
 806                 return nil
 807         end
 808
 809         return pkgmgr.global_mods:get_list()[idx]
 810 end
 811
 812 --------------------------------------------------------------------------------
 813 function pkgmgr.refresh_globals()
 814         local function is_equal(element,uid) --uid match
 815                 if element.name == uid then
 816                         return true
 817                 end
 818         end
 819         pkgmgr.global_mods = filterlist.create(pkgmgr.preparemodlist,
 820                         pkgmgr.comparemod, is_equal, nil, {})
 821         pkgmgr.global_mods:add_sort_mechanism("alphabetic", sort_mod_list)
 822         pkgmgr.global_mods:set_sortmode("alphabetic")
 823 end
 824
 825 --------------------------------------------------------------------------------
 826 function pkgmgr.find_by_gameid(gameid)
 827         for i=1,#pkgmgr.games,1 do
 828                 if pkgmgr.games[i].id == gameid then
 829                         return pkgmgr.games[i], i
 830                 end
 831         end
 832         return nil, nil
 833 end
 834
 835 --------------------------------------------------------------------------------
 836 function pkgmgr.get_game_mods(gamespec, retval)
 837         if gamespec ~= nil and
 838                 gamespec.gamemods_path ~= nil and
 839                 gamespec.gamemods_path ~= "" then
 840                 get_mods(gamespec.gamemods_path, ("games/%s/mods"):format(gamespec.id), retval)
 841         end
 842 end
 843
 844 --------------------------------------------------------------------------------
 845 function pkgmgr.get_game_modlist(gamespec)
 846         local retval = ""
 847         local game_mods = {}
 848         pkgmgr.get_game_mods(gamespec, game_mods)
 849         for i=1,#game_mods,1 do
 850                 if retval ~= "" then
 851                         retval = retval..","
 852                 end
 853                 retval = retval .. game_mods[i].name
 854         end
 855         return retval
 856 end
 857
 858 --------------------------------------------------------------------------------
 859 function pkgmgr.get_game(index)
 860         if index > 0 and index <= #pkgmgr.games then
 861                 return pkgmgr.games[index]
 862         end
 863
 864         return nil
 865 end
 866
 867 --------------------------------------------------------------------------------
 868 function pkgmgr.update_gamelist()
 869         pkgmgr.games = core.get_games()
 870 end
 871
 872 --------------------------------------------------------------------------------
 873 function pkgmgr.gamelist()
 874         local retval = ""
 875         if #pkgmgr.games > 0 then
 876                 retval = retval .. core.formspec_escape(pkgmgr.games[1].name)
 877
 878                 for i=2,#pkgmgr.games,1 do
 879                         retval = retval .. "," .. core.formspec_escape(pkgmgr.games[i].name)
 880                 end
 881         end
 882         return retval
 883 end
 884
 885 --------------------------------------------------------------------------------
 886 -- read initial data
 887 --------------------------------------------------------------------------------
 888 pkgmgr.update_gamelist()