Refactor relationship resolver to capture full resolved tree

Cmdline/Action/Install.cs

@@ -123,7 +123,7 @@ public int RunCommand(CKAN.GameInstance instance, object raw_options)
                     user.RaiseMessage("");
                     done = true;
                 }
-                catch (DependencyNotSatisfiedKraken ex)
+                catch (DependenciesNotSatisfiedKraken ex)
                 {
                     user.RaiseError("{0}", ex.Message);
                     user.RaiseMessage(Properties.Resources.InstallTryAgain);

Cmdline/Action/Replace.cs

@@ -163,10 +163,9 @@ public int RunCommand(CKAN.GameInstance instance, object raw_options)
                                  regMgr);
                     user.RaiseMessage("");
                 }
-                catch (DependencyNotSatisfiedKraken ex)
+                catch (DependenciesNotSatisfiedKraken ex)
                 {
-                    user.RaiseMessage(Properties.Resources.ReplaceDependencyNotSatisfied,
-                        ex.parent, ex.module, ex.version ?? "", instance.game.ShortName);
+                    user.RaiseMessage("{0}", ex.Message);
                 }
             }
             else

Cmdline/Properties/Resources.fr-FR.resx

@@ -390,7 +390,6 @@ Soyez sûr d'avoir saisi au moins les valeurs de version majeure et mineure au f
   </data>
   <data name="InstallTryAgain" xml:space="preserve">
     <value>Si vous êtes chanceux, vous pouvez taper `ckan update` et réessayer.
-Essayez `ckan install --no-recommends` pour ignorer l'installation des modules recommandés.
 Ou `ckan install --allow-incompatible` pour ignorer la compatibilité des modules.</value>
   </data>
   <data name="InstallUnversionedDependencyNotSatisfied" xml:space="preserve">

Cmdline/Properties/Resources.it-IT.resx

@@ -380,7 +380,6 @@ Assicurati di inserire almeno i valori di versione maggiore e minore nella forma
   </data>
   <data name="InstallTryAgain" xml:space="preserve">
     <value>Se sei fortunato, puoi fare un `ckan update` e riprovare.
-Prova `ckan install --no-recommends` per saltare l'installazione dei moduli consigliati.
 Oppure `ckan install --allow-incompatible` per ignorare la compatibilità dei moduli.</value>
   </data>
   <data name="InstallUnversionedDependencyNotSatisfied" xml:space="preserve">

Cmdline/Properties/Resources.pl-PL.resx

@@ -367,7 +367,6 @@ Upewnij się, że wprowadziłeś wersję w postaci Maj.Min - np. 1.5</value>
   </data>
   <data name="InstallTryAgain" xml:space="preserve">
     <value>Jeśli masz szczęście, możesz wykonać `ckan update` i spróbować ponownie.
-Spróbuj `ckan install --no-recommends` aby pominąć instalację zalecanych modułów.
 Lub `ckan install --allow-niecompatible` aby zignorować kompatybilność modułów.</value>
   </data>
   <data name="InstallUnversionedDependencyNotSatisfied" xml:space="preserve">

Cmdline/Properties/Resources.resx

@@ -218,9 +218,10 @@ Make sure to enter at least the version major and minor values in the form Maj.M
   <data name="ImportError" xml:space="preserve"><value>Import error: {0}</value></data>
   <data name="ImportNotFound" xml:space="preserve"><value>File not found: {0}</value></data>
   <data name="InstallNotFound" xml:space="preserve"><value>File not found, exiting: {0}</value></data>
-  <data name="InstallTryAgain" xml:space="preserve"><value>If you're lucky, you can do a `ckan update` and try again.
-Try `ckan install --no-recommends` to skip installation of recommended modules.
-Or `ckan install --allow-incompatible` to ignore module compatibility.</value></data>
+  <data name="InstallTryAgain" xml:space="preserve"><value>
+You can use the `ckan compat` commands to change which game versions are treated as compatible.
+If a newly compatible version was just released, you can do a `ckan update` and try again.
+Or `ckan install --allow-incompatible` to ignore compatibility of the modules on the command line (but not dependencies).</value></data>
   <data name="InstallUnversionedDependencyNotSatisfied" xml:space="preserve"><value>Module {0} required but it is not listed in the index, or not available for your version of {1}</value></data>
   <data name="InstallVersionedDependencyNotSatisfied" xml:space="preserve"><value>Module {0} {1} required but it is not listed in the index, or not available for your version of {2}</value></data>
   <data name="InstallBadMetadata" xml:space="preserve"><value>Bad metadata detected for module {0}: {1}</value></data>

Cmdline/Properties/Resources.ru-RU.resx

@@ -206,7 +206,6 @@
   <data name="ImportNotFound" xml:space="preserve"><value>Файл не найден: {0}</value></data>
   <data name="InstallNotFound" xml:space="preserve"><value>Файл не найден, выход: {0}</value></data>
   <data name="InstallTryAgain" xml:space="preserve"><value>Попробуйте совершить `ckan update` и попытайтесь заново.
-Используйте `ckan install --no-recommends`, чтобы пропустить установку рекомендуемых модулей.
 Либо используйте `ckan install --allow-incompatible`, чтобы игнорировать проблемы совместимости.</value></data>
   <data name="InstallUnversionedDependencyNotSatisfied" xml:space="preserve"><value>Необходим модуль {0}, но он отсутствует в указателе либо недоступен для вашей версии {1}</value></data>
   <data name="InstallVersionedDependencyNotSatisfied" xml:space="preserve"><value>Необходим модуль {0} {1}, но он отсутствует в указателе либо недоступен для вашей версии {2}</value></data>

ConsoleUI/DependencyScreen.cs

@@ -155,12 +155,13 @@ public DependencyScreen(ConsoleTheme        theme,
 
         private void generateList(HashSet<CkanModule> inst)
         {
-            if (ModuleInstaller.FindRecommendations(
-                manager.CurrentInstance,
-                inst, new List<CkanModule>(inst), registry,
-                out Dictionary<CkanModule, Tuple<bool, List<string>>> recommendations,
-                out Dictionary<CkanModule, List<string>> suggestions,
-                out Dictionary<CkanModule, HashSet<string>> supporters
+            if (manager.CurrentInstance is GameInstance instance
+                && ModuleInstaller.FindRecommendations(
+                    instance,
+                    inst, new List<CkanModule>(inst), registry,
+                    out Dictionary<CkanModule, Tuple<bool, List<string>>> recommendations,
+                    out Dictionary<CkanModule, List<string>> suggestions,
+                    out Dictionary<CkanModule, HashSet<string>> supporters
             )) {
                 foreach ((CkanModule mod, Tuple<bool, List<string>> checkedAndDependents) in recommendations) {
                     dependencies.Add(mod, new Dependency(
@@ -215,11 +216,12 @@ private bool HasConflicts(IEnumerable<CkanModule>               toAdd,
                         plan.Remove.Select(ident => registry.InstalledModule(ident)?.Module)
                                    .OfType<CkanModule>(),
                         RelationshipResolverOptions.ConflictsOpts(), registry,
+                        manager.CurrentInstance.game,
                         manager.CurrentInstance.VersionCriteria());
                     descriptions = resolver.ConflictDescriptions.ToList();
                     return descriptions.Count > 0;
                 }
-                catch (DependencyNotSatisfiedKraken k)
+                catch (DependenciesNotSatisfiedKraken k)
                 {
                     descriptions = new List<string>() { k.Message };
                     return true;

ConsoleUI/InstallScreen.cs

@@ -167,8 +167,8 @@ public override void Run(Action? process = null)
 
                         } catch (BadMetadataKraken ex) {
                             RaiseError(Properties.Resources.InstallBadMetadata, ex.module?.ToString() ?? "", ex.Message);
-                        } catch (DependencyNotSatisfiedKraken ex) {
-                            RaiseError(Properties.Resources.InstallUnsatisfiedDependency, ex.parent, ex.module, ex.Message);
+                        } catch (DependenciesNotSatisfiedKraken ex) {
+                            RaiseError("{0}", ex.Message);
                         } catch (ModuleNotFoundKraken ex) {
                             RaiseError(Properties.Resources.InstallModuleNotFound, ex.module, ex.Message);
                         } catch (ModNotInstalledKraken ex) {

Core/CKAN-core.csproj

@@ -60,6 +60,7 @@
     <PackageReference Include="Nullable" Version="1.3.1" PrivateAssets="all" />
     <PackageReference Include="IndexRange" Version="1.0.3" />
     <PackageReference Include="StringSyntaxAttribute" Version="1.0.0" />
+    <PackageReference Include="Microsoft.Bcl.HashCode" Version="1.1.1" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\_build\meta\GlobalAssemblyVersionInfo.cs">

Core/Extensions/EnumerableExtensions.cs

@@ -279,6 +279,20 @@ public static IEnumerable<Match> WithMatches(this IEnumerable<string> source, Re
             => source.Select(item => Utilities.DefaultIfThrows(()  => func(item),
                                                                exc => onThrow(item, exc)));
 
+        /// <summary>
+        /// Get a hash code for a sequence with a variable number of elements
+        /// </summary>
+        /// <typeparam name="T">Type of the elements in the sequence</typeparam>
+        /// <param name="source">The sequence</param>
+        /// <returns></returns>
+        public static int ToSequenceHashCode<T>(this IEnumerable<T> source)
+            => source.Aggregate(new HashCode(),
+                                (hc, item) =>
+                                {
+                                    hc.Add(item);
+                                    return hc;
+                                },
+                                hc => hc.ToHashCode());
     }
 
     /// <summary>

Core/ModuleInstaller.cs

@@ -146,6 +146,7 @@ public void InstallList(ICollection<CkanModule>     modules,
             }
             var resolver = new RelationshipResolver(modules, null, options,
                                                     registry_manager.registry,
+                                                    instance.game,
                                                     instance.VersionCriteria());
             var modsToInstall = resolver.ModList().ToList();
             var downloads = new List<CkanModule>();
@@ -774,6 +775,7 @@ public void UninstallList(IEnumerable<string>  mods,
                             .Where(im => !revdep.Contains(im.identifier))
                             .Concat(installing?.Select(m => new InstalledModule(null, m, Array.Empty<string>(), false)) ?? Array.Empty<InstalledModule>())
                             .ToList(),
+                        instance.game,
                         instance.VersionCriteria())
                     .Select(im => im.identifier))
                 .ToList();
@@ -1185,6 +1187,7 @@ public void Upgrade(ICollection<CkanModule> modules,
                            .OfType<CkanModule>(),
                     RelationshipResolverOptions.DependsOnlyOpts(),
                     registry,
+                    instance.game,
                     instance.VersionCriteria());
                 modules = resolver.ModList().ToArray();
                 autoInstalled = modules.ToDictionary(m => m, resolver.IsAutoInstalled);
@@ -1285,6 +1288,7 @@ public void Upgrade(ICollection<CkanModule> modules,
                             .Where(im => !removingIdents.Contains(im.identifier))
                             .Concat(modules.Select(m => new InstalledModule(null, m, Array.Empty<string>(), false)))
                             .ToList(),
+                    instance.game,
                     instance.VersionCriteria())
                 .ToList();
             if (autoRemoving.Count > 0)
@@ -1318,7 +1322,7 @@ public void Upgrade(ICollection<CkanModule> modules,
         /// Enacts listed Module Replacements to the specified versions for the user's KSP.
         /// Will *re-install* or *downgrade* (with a warning) as well as upgrade.
         /// </summary>
-        /// <exception cref="DependencyNotSatisfiedKraken">Thrown if a dependency for a replacing module couldn't be satisfied.</exception>
+        /// <exception cref="DependenciesNotSatisfiedKraken">Thrown if a dependency for a replacing module couldn't be satisfied.</exception>
         /// <exception cref="ModuleNotFoundKraken">Thrown if a module that should be replaced is not installed.</exception>
         public void Replace(IEnumerable<ModuleReplacement> replacements,
                             RelationshipResolverOptions    options,
@@ -1401,7 +1405,8 @@ public void Replace(IEnumerable<ModuleReplacement> replacements,
                     }
                 }
             }
-            var resolver = new RelationshipResolver(modsToInstall, null, options, registry_manager.registry, instance.VersionCriteria());
+            var resolver = new RelationshipResolver(modsToInstall, null, options, registry_manager.registry,
+                                                    instance.game, instance.VersionCriteria());
             var resolvedModsToInstall = resolver.ModList().ToList();
             AddRemove(ref possibleConfigOnlyDirs,
                       registry_manager,
@@ -1433,19 +1438,19 @@ public static IEnumerable<string> PrioritizedHosts(IEnumerable<Uri>? urls)
         /// <returns>
         /// true if anything found, false otherwise
         /// </returns>
-        public static bool FindRecommendations(GameInstance?                                         instance,
+        public static bool FindRecommendations(GameInstance                                          instance,
                                                HashSet<CkanModule>                                   sourceModules,
                                                List<CkanModule>                                      toInstall,
                                                Registry                                              registry,
                                                out Dictionary<CkanModule, Tuple<bool, List<string>>> recommendations,
                                                out Dictionary<CkanModule, List<string>>              suggestions,
                                                out Dictionary<CkanModule, HashSet<string>>           supporters)
         {
-            var crit     = instance?.VersionCriteria();
+            var crit     = instance.VersionCriteria();
             var resolver = new RelationshipResolver(sourceModules.Where(m => !m.IsDLC),
                                                     null,
                                                     RelationshipResolverOptions.KitchenSinkOpts(),
-                                                    registry, crit);
+                                                    registry, instance.game, crit);
             var recommenders = resolver.Dependencies().ToHashSet();
 
             var checkedRecs = resolver.Recommendations(recommenders)
@@ -1454,7 +1459,7 @@ public static bool FindRecommendations(GameInstance?
                                       .ToHashSet();
             var conflicting = new RelationshipResolver(toInstall.Concat(checkedRecs), null,
                                                        RelationshipResolverOptions.ConflictsOpts(),
-                                                       registry, crit)
+                                                       registry, instance.game, crit)
                                   .ConflictList.Keys;
             // Don't check recommendations that conflict with installed or installing mods
             checkedRecs.ExceptWith(conflicting);
@@ -1486,7 +1491,7 @@ public static bool FindRecommendations(GameInstance?
                                              toInstall.Concat(recommendations.Keys)
                                                       .Concat(suggestions.Keys))
                                  .Where(kvp => CanInstall(toInstall.Append(kvp.Key).ToList(),
-                                                          opts, registry, crit))
+                                                          opts, registry, instance.game, crit))
                                  .ToDictionary();
 
             return recommendations.Count > 0
@@ -1507,14 +1512,15 @@ public static bool FindRecommendations(GameInstance?
         public static bool CanInstall(List<CkanModule>            toInstall,
                                       RelationshipResolverOptions opts,
                                       IRegistryQuerier            registry,
-                                      GameVersionCriteria?        crit)
+                                      IGame                       game,
+                                      GameVersionCriteria         crit)
         {
             string request = string.Join(", ", toInstall.Select(m => m.identifier));
             try
             {
                 var installed = toInstall.Select(m => registry.InstalledModule(m.identifier)?.Module)
                                          .OfType<CkanModule>();
-                var resolver = new RelationshipResolver(toInstall, installed, opts, registry, crit);
+                var resolver = new RelationshipResolver(toInstall, installed, opts, registry, game, crit);
 
                 var resolverModList = resolver.ModList(false).ToList();
                 if (resolverModList.Count >= toInstall.Count(m => !m.IsMetapackage))
@@ -1536,7 +1542,7 @@ public static bool CanInstall(List<CkanModule>            toInstall,
                 foreach (var mod in k.modules)
                 {
                     // Try each option recursively to see if any are successful
-                    if (CanInstall(toInstall.Append(mod).ToList(), opts, registry, crit))
+                    if (CanInstall(toInstall.Append(mod).ToList(), opts, registry, game, crit))
                     {
                         // Child call will emit debug output, so we don't need to here
                         return true;

Core/Properties/Resources.resx

@@ -275,7 +275,8 @@ Which {0} provider would you like to install?</value></data>
 {1}
 
 If the game is still running, close it and try again. Otherwise check the permissions.</value></data>
-  <data name="KrakenMissingDependency" xml:space="preserve"><value>{0} missing dependency {1}</value></data>
+  <data name="KrakenMissingDependency" xml:space="preserve"><value>Unsatisfied dependency {1} needed for: {0}</value></data>
+  <data name="KrakenMissingDependencyNeededFor" xml:space="preserve"><value>needed for {0}</value></data>
   <data name="KrakenConflictsWith" xml:space="preserve"><value>{0} conflicts with {1}</value></data>
   <data name="KrakenDownloadErrorsHeader" xml:space="preserve"><value>Uh oh, the following things went wrong when downloading...</value></data>
   <data name="KrakenModuleDownloadErrorsHeader" xml:space="preserve"><value>One or more downloads were unsuccessful:</value></data>

Core/Registry/CompatibilitySorter.cs

@@ -28,7 +28,7 @@ public CompatibilitySorter(GameVersionCriteria                              crit
                                    IEnumerable<Dictionary<string, AvailableModule>> available,
                                    Dictionary<string, HashSet<AvailableModule>>     providers,
                                    Dictionary<string, InstalledModule>              installed,
-                                   HashSet<string>                                  dlls,
+                                   ICollection<string>                              dlls,
                                    IDictionary<string, ModuleVersion>               dlc)
         {
             CompatibleVersions = crit;
@@ -104,8 +104,8 @@ public ICollection<CkanModule> LatestIncompatible
         }
 
         private readonly Dictionary<string, InstalledModule> installed;
-        private readonly HashSet<string> dlls;
-        private readonly IDictionary<string, ModuleVersion> dlc;
+        private readonly ICollection<string>                 dlls;
+        private readonly IDictionary<string, ModuleVersion>  dlc;
 
         private List<CkanModule>? latestCompatible;
         private List<CkanModule>? latestIncompatible;