Support deleting remote branches via the delete button

The delete button and context menu action now detect whether the
selected branch is remote (tracked via Qt::UserRole on list items).
Remote branches are deleted with `git push --delete <remote> <branch>`
with an appropriate confirmation dialog warning about server-side
removal. Local branches continue using `git branch -D`.

gitplusplus.cpp

@@ -836,6 +836,7 @@ void GitPlusPlusView::onBranchFinished(int exitCode, QProcess::ExitStatus)
     if (exitCode == 0) {
         QByteArray output = proc->readAllStandardOutput();
         m_allBranches.clear();
+        m_remoteBranches.clear();
         QString current;
 
         const auto lines = output.split('\n');
@@ -849,17 +850,25 @@ void GitPlusPlusView::onBranchFinished(int exitCode, QProcess::ExitStatus)
             // Skip HEAD pointer in remotes
             if (branch.contains(QStringLiteral(" -> "))) continue;
             // Strip "remotes/" prefix for display (show as origin/foo)
-            if (branch.startsWith(QStringLiteral("remotes/")))
+            bool isRemote = false;
+            if (branch.startsWith(QStringLiteral("remotes/"))) {
                 branch = branch.mid(8); // len("remotes/") == 8
+                isRemote = true;
+            }
             // Deduplicate: if local branch matches a remote, skip the remote
-            if (!m_allBranches.contains(branch))
+            if (!m_allBranches.contains(branch)) {
                 m_allBranches.append(branch);
+                if (isRemote)
+                    m_remoteBranches.append(branch);
+            }
         }
 
         // Update branch list widget
         m_branchList->clear();
         for (const auto &b : m_allBranches) {
             auto *item = new QListWidgetItem(b, m_branchList);
+            // Mark remote branches (those that came from remotes/ prefix)
+            item->setData(Qt::UserRole, m_remoteBranches.contains(b));
             if (b == current) {
                 item->setText(QStringLiteral("* ") + b);
                 QFont f = item->font();
@@ -1202,26 +1211,62 @@ void GitPlusPlusView::deleteBranch()
         return;
     }
 
-    if (QMessageBox::question(m_toolView, QStringLiteral("Delete Branch"),
+    // Detect if this is a remote branch via the UserRole flag
-            QStringLiteral("Delete branch '%1'?").arg(branch),
+    auto *item = m_branchList->currentItem();
-            QMessageBox::Yes | QMessageBox::No, QMessageBox::No) != QMessageBox::Yes)
+    bool isRemote = item && item->data(Qt::UserRole).toBool();
-        return;
 
-    // Use -D for force delete (handles unmerged branches)
+    if (isRemote) {
-    auto *proc = gitProcess({QStringLiteral("branch"), QStringLiteral("-D"), branch});
+        // Remote branch: extract remote name and branch name (e.g. "origin/feature" -> "origin", "feature")
-    if (!proc) return;
+        int sep = branch.indexOf(QLatin1Char('/'));
-    connect(proc, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
+        if (sep <= 0) {
-            this, [this, proc, branch](int exitCode, QProcess::ExitStatus) {
+            setMessage(QStringLiteral("Cannot determine remote for branch: ") + branch, true);
-        if (exitCode == 0) {
+            return;
-            setMessage(QStringLiteral("Deleted branch: ") + branch);
-        } else {
-            QString err = QString::fromUtf8(proc->readAllStandardError()).trimmed();
-            setMessage(QStringLiteral("Delete failed: ") + err, true);
         }
-        proc->deleteLater();
+        QString remote = branch.left(sep);
-        refreshAll();
+        QString remoteBranch = branch.mid(sep + 1);
-    });
+
-    proc->start();
+        if (QMessageBox::question(m_toolView, QStringLiteral("Delete Remote Branch"),
+                QStringLiteral("Delete remote branch '%1' from '%2'?\n\nThis will remove it from the remote server.").arg(remoteBranch, remote),
+                QMessageBox::Yes | QMessageBox::No, QMessageBox::No) != QMessageBox::Yes)
+            return;
+
+        auto *proc = gitProcess({QStringLiteral("push"), QStringLiteral("--delete"), remote, remoteBranch});
+        if (!proc) return;
+        connect(proc, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
+                this, [this, proc, branch](int exitCode, QProcess::ExitStatus) {
+            if (exitCode == 0) {
+                setMessage(QStringLiteral("Deleted remote branch: ") + branch);
+            } else {
+                QString err = QString::fromUtf8(proc->readAllStandardError()).trimmed();
+                setMessage(QStringLiteral("Delete failed: ") + err, true);
+            }
+            proc->deleteLater();
+            refreshAll();
+        });
+        proc->start();
+    } else {
+        // Local branch
+        if (QMessageBox::question(m_toolView, QStringLiteral("Delete Branch"),
+                QStringLiteral("Delete local branch '%1'?").arg(branch),
+                QMessageBox::Yes | QMessageBox::No, QMessageBox::No) != QMessageBox::Yes)
+            return;
+
+        // Use -D for force delete (handles unmerged branches)
+        auto *proc = gitProcess({QStringLiteral("branch"), QStringLiteral("-D"), branch});
+        if (!proc) return;
+        connect(proc, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
+                this, [this, proc, branch](int exitCode, QProcess::ExitStatus) {
+            if (exitCode == 0) {
+                setMessage(QStringLiteral("Deleted branch: ") + branch);
+            } else {
+                QString err = QString::fromUtf8(proc->readAllStandardError()).trimmed();
+                setMessage(QStringLiteral("Delete failed: ") + err, true);
+            }
+            proc->deleteLater();
+            refreshAll();
+        });
+        proc->start();
+    }
 }
 
 void GitPlusPlusView::compareBranch()

gitplusplus.h

@@ -173,6 +173,7 @@ private:
     QString m_gitDir;
     QString m_currentBranch;
     QStringList m_allBranches;
+    QStringList m_remoteBranches;
     bool m_isDirty = false;
     QPointer<QProcess> m_remoteProc;
     int m_spinnerFrame = 0;