Add demo project for conan build

.github/workflows/kafka_api_demo_conan_build.yml

@@ -0,0 +1,65 @@
+name: '[Kafka API] Demo: Conan Build'
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+env:
+  DEMO_PROJ_DIR: demo_projects_for_build/conan_build
+
+jobs:
+  kafka-api-demo-conan-build:
+    strategy:
+      matrix:
+        os:
+          - ubuntu-22.04
+          - macos-12
+          - windows-latest
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Prepare
+        run: |
+          pip3 install conan
+
+      - name: Build (non-windows)
+        if: ${{!contains(matrix.os, 'windows')}}
+        run: |
+          cd ${DEMO_PROJ_DIR}
+          mkdir -p build
+          cd build
+
+          conan install .. --build=missing
+
+          cmake .. -G "Unix Makefiles"
+          cmake --build .
+
+          bin/kafka_sync_producer
+          bin/kafka_async_producer_copy_payload
+          bin/kafka_async_producer_not_copy_payload
+          bin/kafka_auto_commit_consumer
+          bin/kafka_manual_commit_consumer
+
+      - name: Build (windows)
+        if: contains(matrix.os, 'windows')
+        run: |
+          cd $Env:DEMO_PROJ_DIR
+          mkdir -p build
+          cd build
+
+          conan install .. --build=missing
+
+          cmake ..
+          cmake --build .
+
+          bin/kafka_sync_producer.exe
+          bin/kafka_async_producer_copy_payload.exe
+          bin/kafka_async_producer_not_copy_payload.exe
+          bin/kafka_auto_commit_consumer.exe
+          bin/kafka_manual_commit_consumer.exe
+

demo_projects_for_build/conan_build/CMakeLists.txt

@@ -0,0 +1,28 @@
+cmake_minimum_required(VERSION "3.8")
+project("kafka-examples")
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
+
+include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
+conan_basic_setup()
+
+# Target: kafka_sync_producer
+add_executable("kafka_sync_producer" "../../examples/kafka_sync_producer.cc")
+target_link_libraries("kafka_sync_producer" ${CONAN_LIBS})
+
+# Target: kafka_async_producer_copy_payload
+add_executable("kafka_async_producer_copy_payload" "../../examples/kafka_async_producer_copy_payload.cc")
+target_link_libraries("kafka_async_producer_copy_payload" ${CONAN_LIBS})
+
+# Target: kafka_async_producer_not_copy_payload
+add_executable("kafka_async_producer_not_copy_payload" "../../examples/kafka_async_producer_not_copy_payload.cc")
+target_link_libraries("kafka_async_producer_not_copy_payload" ${CONAN_LIBS})
+
+# Target: kafka_auto_commit_consumer
+add_executable("kafka_auto_commit_consumer" "../../examples/kafka_auto_commit_consumer.cc")
+target_link_libraries("kafka_auto_commit_consumer" ${CONAN_LIBS})
+
+# Target: kafka_manual_commit_consumer
+add_executable("kafka_manual_commit_consumer" "../../examples/kafka_manual_commit_consumer.cc")
+target_link_libraries("kafka_manual_commit_consumer" ${CONAN_LIBS})

demo_projects_for_build/conan_build/conanfile.txt

@@ -0,0 +1,5 @@
+[requires]
+modern-cpp-kafka/2022.06.15
+
+[generators]
+cmake

examples/kafka_async_producer_copy_payload.cc

@@ -10,7 +10,7 @@ int main(int argc, char **argv)
 
     if (argc != 3) {
         std::cerr << "Usage: " << argv[0] << " <brokers> <topic>\n";
-        exit(1); // NOLINT
+        exit(argc == 1 ? 0 : 1); // NOLINT
     }
 
     std::string brokers = argv[1];

examples/kafka_async_producer_not_copy_payload.cc

@@ -10,7 +10,7 @@ int main(int argc, char **argv)
 
     if (argc != 3) {
         std::cerr << "Usage: " << argv[0] << " <brokers> <topic>\n";
-        exit(1); // NOLINT
+        exit(argc == 1 ? 0 : 1); // NOLINT
     }
 
     std::string brokers = argv[1];

examples/kafka_auto_commit_consumer.cc

@@ -7,7 +7,7 @@ int main(int argc, char **argv)
 {
     if (argc != 3) {
         std::cerr << "Usage: " << argv[0] << " <brokers> <topic>\n";
-        exit(1); // NOLINT
+        exit(argc == 1 ? 0 : 1); // NOLINT
     }
 
     std::string brokers = argv[1];

examples/kafka_manual_commit_consumer.cc

@@ -7,7 +7,7 @@ int main(int argc, char **argv)
 {
     if (argc != 3) {
         std::cerr << "Usage: " << argv[0] << " <brokers> <topic>\n";
-        exit(1); // NOLINT
+        exit(argc == 1 ? 0 : 1); // NOLINT
     }
 
     std::string brokers = argv[1];

examples/kafka_sync_producer.cc

@@ -9,7 +9,7 @@ int main(int argc, char **argv)
 
     if (argc != 3) {
         std::cerr << "Usage: " << argv[0] << " <brokers> <topic>\n";
-        exit(1); // NOLINT
+        exit(argc == 1 ? 0 : 1); // NOLINT
     }
 
     std::string brokers = argv[1];