cmake: Add debugger

- Depends on cppdap and jsoncpp.
- Add --debugger argument to enable the Debugger.
- Add --debugger-pipe argument for DAP traffics over named pipes.
- Support breakpoints by filenames and line numbers.
- Support exception breakpoints.
- Call stack shows filenames and line numbers.
- Show Cache Variables.
- Show the state of currently defined targets,
  tests and directories with their properties.
- Add cmakeVersion to DAP initialize response.
- Include unit tests.

Co-authored-by: Ben McMorran <bemcmorr@microsoft.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/Source/cmDebuggerVariablesManager.h b/Source/cmDebuggerVariablesManager.h
new file mode 100644
index 0000000..c219164
--- /dev/null
+++ b/Source/cmDebuggerVariablesManager.h
@@ -0,0 +1,40 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#pragma once
+
+#include "cmConfigure.h" // IWYU pragma: keep
+
+#include <cstdint>
+#include <functional>
+#include <unordered_map>
+#include <vector>
+
+#include <cm3p/cppdap/types.h> // IWYU pragma: keep
+
+namespace dap {
+struct Variable;
+struct VariablesRequest;
+}
+
+namespace cmDebugger {
+
+class cmDebuggerVariablesManager
+{
+  std::unordered_map<
+    int64_t,
+    std::function<dap::array<dap::Variable>(dap::VariablesRequest const&)>>
+    VariablesHandlers;
+  void RegisterHandler(
+    int64_t id,
+    std::function<dap::array<dap::Variable>(dap::VariablesRequest const&)>
+      handler);
+  void UnregisterHandler(int64_t id);
+  friend class cmDebuggerVariables;
+
+public:
+  cmDebuggerVariablesManager() = default;
+  dap::array<dap::Variable> HandleVariablesRequest(
+    dap::VariablesRequest const& request);
+};
+
+} // namespace cmDebugger