build: add CMake skeleton and dependency discovery

5 files changed, 57 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..9364240
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,24 @@
+cmake_minimum_required(VERSION 3.21)
+project(qtmaildir VERSION 0.1.0 LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_AUTOMOC ON)
+
+find_package(Qt6 6.5 REQUIRED COMPONENTS Widgets WebEngineWidgets Test)
+
+# notmuch ships no pkg-config file; locate it by hand.
+find_path(NOTMUCH_INCLUDE_DIR notmuch.h)
+find_library(NOTMUCH_LIBRARY NAMES notmuch)
+if(NOT NOTMUCH_INCLUDE_DIR OR NOT NOTMUCH_LIBRARY)
+    message(FATAL_ERROR
+        "libnotmuch not found. Need notmuch.h and libnotmuch on the system.")
+endif()
+message(STATUS "Found notmuch: ${NOTMUCH_LIBRARY}")
+
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GMIME REQUIRED IMPORTED_TARGET gmime-3.0)
+
+enable_testing()
+add_subdirectory(src)
+add_subdirectory(tests)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
new file mode 100644
index 0000000..e9e28e5
--- /dev/null
+++ b/src/CMakeLists.txt
@@ -0,0 +1,14 @@
+add_library(qtmaildir_lib STATIC
+    main_placeholder.cpp
+)
+
+target_include_directories(qtmaildir_lib
+    PUBLIC ${CMAKE_CURRENT_SOURCE_DIR} ${NOTMUCH_INCLUDE_DIR})
+
+target_link_libraries(qtmaildir_lib
+    PUBLIC Qt6::Widgets Qt6::WebEngineWidgets PkgConfig::GMIME ${NOTMUCH_LIBRARY})
+
+add_executable(qtmaildir main.cpp)
+target_link_libraries(qtmaildir PRIVATE qtmaildir_lib)
+
+install(TARGETS qtmaildir RUNTIME DESTINATION bin)
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..9c7b977
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,10 @@
+#include <QApplication>
+#include <QLabel>
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    QLabel label(QStringLiteral("qtmaildir"));
+    label.show();
+    return app.exec();
+}
diff --git a/src/main_placeholder.cpp b/src/main_placeholder.cpp
new file mode 100644
index 0000000..9ddb3f2
--- /dev/null
+++ b/src/main_placeholder.cpp
@@ -0,0 +1,3 @@
+// Placeholder so the library target has a source file before real code lands.
+// Removed in Task 2.
+namespace { int qtmaildir_placeholder = 0; }
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
new file mode 100644
index 0000000..3344d4a
--- /dev/null
+++ b/tests/CMakeLists.txt
@@ -0,0 +1,6 @@
+# add_qtmaildir_test(<name>) builds tests/test_<name>.cpp and registers it.
+function(add_qtmaildir_test name)
+    add_executable(test_${name} test_${name}.cpp)
+    target_link_libraries(test_${name} PRIVATE qtmaildir_lib Qt6::Test)
+    add_test(NAME ${name} COMMAND test_${name})
+endfunction()