Sort out versioning

I should've done this ages ago

CMakeLists.txt

@@ -34,26 +34,31 @@ set(CURL_INSTALL OFF CACHE STRING "" FORCE)
 
 
 include(FetchContent)
-FetchContent_Declare(stc GIT_REPOSITORY https://github.com/LunarWatcher/stc)
+FetchContent_Declare(stc
+    GIT_REPOSITORY https://github.com/LunarWatcher/stc
+)
 FetchContent_Declare(cpr
     GIT_REPOSITORY https://github.com/libcpr/cpr.git
-    GIT_TAG 1.10.0)
+    GIT_TAG 1.11.1
+)
 FetchContent_Declare(nlohmann
     GIT_REPOSITORY https://github.com/nlohmann/json
-    GIT_TAG v3.11.2)
+    GIT_TAG v3.11.3
+)
 FetchContent_Declare(spdlog
     GIT_REPOSITORY https://github.com/gabime/spdlog
-    GIT_TAG v1.11.0)
+    GIT_TAG v1.15.0
+)
 FetchContent_Declare(lua-cmake
     GIT_REPOSITORY https://github.com/LunarWatcher/lua-cmake/
 )
 FetchContent_Declare(fmt
     GIT_REPOSITORY https://github.com/fmtlib/fmt.git
-    GIT_TAG 9.1.0)
+    GIT_TAG 11.0.2
+)
 
 FetchContent_MakeAvailable(stc)
 FetchContent_MakeAvailable(fmt)
-#FetchContent_MakeAvailable(cpr)
 FetchContent_MakeAvailable(nlohmann)
 FetchContent_MakeAvailable(spdlog)
 FetchContent_MakeAvailable(lua-cmake)
@@ -62,6 +67,20 @@ if (NOT cpr_POPULATED)
     FetchContent_Populate(cpr)
     add_subdirectory(${cpr_SOURCE_DIR} ${cpr_BINARY_DIR} EXCLUDE_FROM_ALL)
 endif()
+
+# Versioning {{{
+find_program(GIT git)
+if (GIT)
+    execute_process(COMMAND ${GIT} describe --tags --always
+        OUTPUT_VARIABLE UPM_VERSION
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+    message(STATUS "Detected version: ${UPM_VERSION}")
+else()
+    message(WARNING "Git not found. Defaulting to unknown version. This will not have an effect on the program beyond a missing version")
+    set(UPM_VERSION "VERSION UNKNOWN. Who doesn't have Git? It's the 2020s. Install it already")
+endif()
+# }}}
 
 add_subdirectory(src)
 add_subdirectory(tests EXCLUDE_FROM_ALL)

src/CMakeLists.txt

@@ -35,6 +35,8 @@ set (SOURCE_FILES
 
 add_library(upm_sources STATIC ${SOURCE_FILES})
 
+target_compile_options(upm_sources PUBLIC -DUPM_VERSION="${UPM_VERSION}")
+
 target_link_libraries(upm_sources PUBLIC stc cpr::cpr fmt::fmt nlohmann_json::nlohmann_json spdlog::spdlog lua::lib)
 target_include_directories(upm_sources PUBLIC .)