initial virtual sensor with protobuf

sensor-query-cli/meson.build

@@ -0,0 +1,26 @@
+project('sensor-query-cli', 'cpp',
+default_options: ['cpp_std=c++20'])
+
+protobuf_dep = dependency('protobuf')
+grpc_dep = dependency('grpc++', required: true)
+
+proto_files = files('../sensor.proto')
+
+protobuf_gen = custom_target(
+    'generate_protobuf',
+    input : proto_files,
+    output : ['sensor.pb.cc', 'sensor.pb.h', 'sensor.grpc.pb.cc', 'sensor.grpc.pb.h'],
+    command : [
+        'protoc',
+        '--proto_path=../../',
+        '--cpp_out', '.',
+        '--grpc_out', '.',
+        '--plugin=protoc-gen-grpc=/usr/bin/grpc_cpp_plugin',
+        '@INPUT@'
+    ],
+)
+
+executable('sensor-query-cli',
+    ['main.cpp', protobuf_gen],
+    dependencies: [protobuf_dep, grpc_dep]
+)