Merge pull request #55 from pleonex/feature/fix-pushDocs

Fix Push-Doc was not pushing the documentation

src/PleOps.Cake/documentation.cake

@@ -46,30 +46,29 @@ Task("Push-Doc")
     }
 
     // TODO: [#6] Implement multi-version documentation
-    string pushWorktreeName = "push-gh-pages";
+    string worktreeName = "push-gh-pages";
     string committerName = "PleOps.Cake Bot";
     string committerEmail = "ci@pleops.cake";
 
     using (Repository repo = new Repository(GitFindRootFromPath(".").FullPath)) {
         bool ownTree = false;
         Worktree tree = null;
-        if (repo.Worktrees.Any(w => w.Name == pushWorktreeName)) {
+        if (repo.Worktrees.Any(w => w.Name == worktreeName)) {
             Information("Re-use worktree");
-            tree = repo.Worktrees[pushWorktreeName];
+            tree = repo.Worktrees[worktreeName];
         } else {
             Information("Create worktree");
 
             // libgit2sharp does not clean the refs and it complains if you run it again later
-            string refPath = $"{repo.Info.Path}/refs/heads/{pushWorktreeName}";
+            string refPath = $"{repo.Info.Path}/refs/heads/{worktreeName}";
             if (FileExists(refPath)) {
                 Information("Deleting old ref");
                 DeleteFile(refPath);
             }
 
             CreateDirectory($"{info.ArtifactsDirectory}/tmp");
             tree = repo.Worktrees.Add(
-                "origin/gh-pages",
-                pushWorktreeName,
+                worktreeName,
                 $"{info.ArtifactsDirectory}/tmp/gh-pages",
                 false); // no lock since it's not a portable media
             ownTree = true;
@@ -79,6 +78,29 @@ Task("Push-Doc")
         string treePath = treeRepo.Info.WorkingDirectory;
         Information($"Worktree at: {treePath}");
 
+        // LibGit2Sharp seems to have a bug where it creates the worktree branch
+        // at the current HEAD (main branch), instead at the given reference.
+        // So we do the checkout with a pull ourselves.
+        var checkoutSettings = new ProcessSettings {
+            Arguments = "checkout gh-pages",
+            WorkingDirectory = treePath,
+        };
+        int checkoutResult = StartProcess("git", checkoutSettings);
+        if (checkoutResult != 0) {
+            Error("Error creating gh-pages branch");
+        }
+
+        var pullSettings = new ProcessSettings {
+            Arguments = "pull --ff-only origin gh-pages",
+            WorkingDirectory = treePath,
+        };
+        int pullResult = StartProcess("git", pullSettings);
+        if (pullResult != 0) {
+            Error("Error pulling");
+        }
+
+        Information($"Current branch: {treeRepo.Head.FriendlyName}");
+
         // Clean directory so we don't keep old files
         // Just move temporary the .git file so it's not deleted.
         CopyFile($"{treePath}/.git", $"{info.ArtifactsDirectory}/tmp/.git");
@@ -111,10 +133,10 @@ Task("Push-Doc")
             Information("No changes detected, no new commits done");
         }
 
-
         if (ownTree) {
             Information("Prune worktree");
             repo.Worktrees.Prune(tree);
+            repo.Branches.Remove(worktreeName);
         }
     }
 });