Issue-1471 Added the ability to prune already deleted repositories. Fixed test data to correctly reference the worktree's working directories

Author: mminns

LibGit2Sharp.Tests/Resources/worktree/testrepo_wd/dot_git/worktrees/i-do-numbers/gitdir

@@ -1 +1 @@
-../../worktrees/i-do-numbers/.git
+../../../../worktrees/i-do-numbers/.git

LibGit2Sharp.Tests/Resources/worktree/testrepo_wd/dot_git/worktrees/logo/gitdir

@@ -1 +1 @@
-../../worktrees/logo/.git
+../../../../worktrees/logo/.git

LibGit2Sharp.Tests/WorktreeFixture.cs

@@ -154,6 +154,29 @@ public void CanPruneUnlockedWorktree()
             }
         }
 
+        [Fact]
+        public void CanPruneDeletedWorktree()
+        {
+            var repoPath = SandboxWorktreeTestRepo();
+            using (var repo = new Repository(repoPath))
+            {
+                Assert.Equal(2, repo.Worktrees.Count());
+                var repoPath2 = repo.Info.Path;
+                var repoWd = repo.Info.WorkingDirectory;
+                // unlocked
+                var worktreeUnlocked = repo.Worktrees["i-do-numbers"];
+                Assert.Equal("i-do-numbers", worktreeUnlocked.Name);
+                Assert.False(worktreeUnlocked.IsLocked);
+                var info = worktreeUnlocked.WorktreeRepository.Info;
+
+                Directory.Delete(info.WorkingDirectory, true);
+
+                Assert.True(repo.Worktrees.Prune(worktreeUnlocked));
+
+                Assert.Single(repo.Worktrees);
+            }
+        }
+
         [Fact]
         public void CanNotPruneLockedWorktree()
         {

LibGit2Sharp/WorktreeCollection.cs

@@ -131,29 +131,19 @@ public virtual bool Prune(Worktree worktree, bool ifLocked)
         {
             using (var handle = worktree.GetWorktreeHandle())
             {
-                using (var repository = worktree.WorktreeRepository)
+                git_worktree_prune_options options = new git_worktree_prune_options
+                {
+                    version = 1,
+                    // default
+                    flags = GitWorktreePruneOptionFlags.GIT_WORKTREE_PRUNE_WORKING_TREE | GitWorktreePruneOptionFlags.GIT_WORKTREE_PRUNE_VALID
+                };
+
+                if (ifLocked)
                 {
-                    string wd = repository.Info.WorkingDirectory;
-
-                    if (!Directory.Exists(wd))
-                    {
-                        return false;
-                    }
-
-                    git_worktree_prune_options options = new git_worktree_prune_options
-                    {
-                        version = 1,
-                        // default
-                        flags = GitWorktreePruneOptionFlags.GIT_WORKTREE_PRUNE_WORKING_TREE | GitWorktreePruneOptionFlags.GIT_WORKTREE_PRUNE_VALID
-                    };
-
-                    if (ifLocked)
-                    {
-                        options.flags |= GitWorktreePruneOptionFlags.GIT_WORKTREE_PRUNE_LOCKED;
-                    }
-
-                    return Proxy.git_worktree_prune(handle, options);
+                    options.flags |= GitWorktreePruneOptionFlags.GIT_WORKTREE_PRUNE_LOCKED;
                 }
+
+                return Proxy.git_worktree_prune(handle, options);
             }
         }