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Fix: Hanging on start up if mod dependency is not resolved'

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This commit is contained in:
Dmitry Orlov
2021-01-20 11:23:58 +03:00
parent 2f5c8d7587
commit 98fdf909e8
1 changed files with 23 additions and 32 deletions
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51
lib/CModHandler.cpp
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@@ -716,50 +716,41 @@ bool CModHandler::checkDependencies(const std::vector <TModID> & input) const
return true;
}
std::vector <TModID> CModHandler::resolveDependencies(std::vector <TModID> input) const
std::vector <TModID> CModHandler::resolveDependencies(std::vector <TModID> modsToResolve) const
{
// Topological sort algorithm
// May not be the fastest one but VCMI does not needs any speed here
// Unless user have dozens of mods with complex dependencies this code should be fine
std::vector<TModID> brokenMods;
// first - sort input to have input strictly based on name (and not on hashmap or anything else)
boost::range::sort(input);
std::vector <TModID> output;
output.reserve(input.size());
std::set <TModID> resolvedMods;
// Check if all mod dependencies are resolved (moved to resolvedMods)
auto isResolved = [&](const CModInfo & mod) -> bool
auto looksValid = [&](const CModInfo & mod) -> bool
{
auto res = true;
for(const TModID & dependency : mod.dependencies)
{
if (!vstd::contains(resolvedMods, dependency))
return false;
if(!(res = vstd::contains(modsToResolve, dependency)))
logMod->error("Mod '%s' will not work: it depends on mod '%s', which is not installed.", mod.name, dependency);
}
return true;
return res;
};
while (!input.empty())
while(true)
{
std::set <TModID> toResolve; // list of mods resolved on this iteration
for (auto it = input.begin(); it != input.end();)
for(auto mod : modsToResolve)
{
if (isResolved(allMods.at(*it)))
if(!looksValid(this->allMods.at(mod)))
brokenMods.push_back(mod);
}
if(!brokenMods.empty())
{
toResolve.insert(*it);
output.push_back(*it);
it = input.erase(it);
vstd::erase_if(modsToResolve, [&](TModID mid)
{
return brokenMods.end() != std::find(brokenMods.begin(), brokenMods.end(), mid);
});
brokenMods.clear();
continue;
}
it++;
break;
}
resolvedMods.insert(toResolve.begin(), toResolve.end());
}
return output;
boost::range::sort(modsToResolve);
return modsToResolve;
}
std::vector<std::string> CModHandler::getModList(std::string path)