diff -r 7384ebae6b7c -r c87bde92805f src/repositories.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/repositories.cpp	Tue Jan 21 20:24:45 2025 +0100
@@ -0,0 +1,66 @@
+/* Copyright 2025 Mike Becker. All rights reserved.
+*
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "repositories.h"
+
+#include <utility>
+#include <filesystem>
+
+using namespace fm;
+namespace fs = std::filesystem;
+
+void repositories::scan(std::string path, unsigned depth) {
+    // check the base path
+    {
+        auto p = fs::path{path};
+        if (is_directory(p / ".hg")) {
+            m_repositories.emplace_back(repository{canonical(p), HG});
+            return;
+        } else if (is_directory(p / ".git")) {
+            m_repositories.emplace_back(repository{canonical(p), GIT});
+            return;
+        } else if (depth == 0) {
+            return;
+        }
+    }
+
+    // if depth is non-zero, scan subdirs recursively
+    --depth;
+    for (auto i = fs::recursive_directory_iterator(
+             std::move(path),
+             fs::directory_options::skip_permission_denied);
+         i != fs::recursive_directory_iterator(); ++i) {
+        if (!i->is_directory()) continue;
+        auto p = i->path();
+        if (is_directory(p / ".hg")) {
+            m_repositories.emplace_back(repository{canonical(p), HG});
+            i.disable_recursion_pending();
+        } else if (is_directory(p / ".git")) {
+            m_repositories.emplace_back(repository{canonical(p), GIT});
+            i.disable_recursion_pending();
+        } else if (i.depth() == depth) {
+            i.disable_recursion_pending();
+        }
+    }
+}