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117 lines
3.4 KiB
C++
117 lines
3.4 KiB
C++
/*
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Minetest-c55
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Copyright (C) 2011 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "mods.h"
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#include <queue>
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#include <fstream>
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#include <sstream>
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#include <map>
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#include "filesys.h"
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#include "strfnd.h"
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#include "log.h"
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// Get a dependency-sorted list of ModSpecs
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core::list<ModSpec> getMods(core::list<std::string> &modspaths)
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throw(ModError)
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{
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std::queue<ModSpec> mods_satisfied;
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core::list<ModSpec> mods_unsorted;
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core::list<ModSpec> mods_sorted;
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// name, path: For detecting name conflicts
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std::map<std::string, std::string> mod_names;
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for(core::list<std::string>::Iterator i = modspaths.begin();
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i != modspaths.end(); i++){
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std::string modspath = *i;
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std::vector<fs::DirListNode> dirlist = fs::GetDirListing(modspath);
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for(u32 j=0; j<dirlist.size(); j++){
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if(!dirlist[j].dir)
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continue;
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std::string modname = dirlist[j].name;
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std::string modpath = modspath + DIR_DELIM + modname;
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// Detect mod name conflicts
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{
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std::map<std::string, std::string>::const_iterator i;
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i = mod_names.find(modname);
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if(i != mod_names.end()){
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std::string s;
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infostream<<"WARNING: Mod name conflict detected: "
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<<std::endl
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<<"Already loaded: "<<i->second<<std::endl
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<<"Will not load: "<<modpath<<std::endl;
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continue;
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}
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}
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std::set<std::string> depends;
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std::ifstream is((modpath+DIR_DELIM+"depends.txt").c_str(),
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std::ios_base::binary);
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while(is.good()){
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std::string dep;
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std::getline(is, dep);
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dep = trim(dep);
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if(dep != "")
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depends.insert(dep);
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}
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ModSpec spec(modname, modpath, depends);
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mods_unsorted.push_back(spec);
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if(depends.empty())
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mods_satisfied.push(spec);
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mod_names[modname] = modpath;
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}
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}
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// Sort by depencencies
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while(!mods_satisfied.empty()){
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ModSpec mod = mods_satisfied.front();
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mods_satisfied.pop();
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mods_sorted.push_back(mod);
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for(core::list<ModSpec>::Iterator i = mods_unsorted.begin();
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i != mods_unsorted.end(); i++){
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ModSpec &mod2 = *i;
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if(mod2.unsatisfied_depends.empty())
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continue;
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mod2.unsatisfied_depends.erase(mod.name);
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if(!mod2.unsatisfied_depends.empty())
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continue;
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mods_satisfied.push(mod2);
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}
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}
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std::ostringstream errs(std::ios::binary);
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// Check unsatisfied dependencies
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for(core::list<ModSpec>::Iterator i = mods_unsorted.begin();
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i != mods_unsorted.end(); i++){
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ModSpec &mod = *i;
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if(mod.unsatisfied_depends.empty())
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continue;
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errs<<"mod \""<<mod.name
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<<"\" has unsatisfied dependencies:";
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for(std::set<std::string>::iterator
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i = mod.unsatisfied_depends.begin();
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i != mod.unsatisfied_depends.end(); i++){
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errs<<" \""<<(*i)<<"\"";
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}
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errs<<"."<<std::endl;
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mods_sorted.push_back(mod);
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}
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if(errs.str().size() != 0){
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throw ModError(errs.str());
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}
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return mods_sorted;
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}
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