feat cmake: add download_userver() and cmake presets (#5)

Co-authored-by: segoon <[email protected]>

.github/workflows/ci.yml

@@ -44,9 +44,9 @@ jobs:
 
           - name: Install packages
             run: |
-                (cd third_party && git clone -b develop --single-branch --depth 1 https://github.com/userver-framework/userver.git)
+                DEPS_FILE="https://raw.githubusercontent.com/userver-framework/userver/refs/heads/develop/scripts/docs/en/deps/${{matrix.os}}.md"
                 sudo apt update
-                sudo apt install --allow-downgrades -y $(cat third_party/userver/scripts/docs/en/deps/${{matrix.os}}.md | tr '\n' ' ')
+                sudo apt install --allow-downgrades -y $(wget -q -O - ${DEPS_FILE})
                 python3 -m pip install -r requirements.txt
 
           - name: Install mongo

.gitignore

@@ -13,3 +13,4 @@ cmake-build-*
 Testing/
 .DS_Store
 Makefile.local
+CMakeUserPresets.json

CMakeLists.txt

@@ -1,25 +1,13 @@
 cmake_minimum_required(VERSION 3.12)
 project(mongo_grpc_service_template CXX)
 
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+include(DownloadUserver)
 
-# Adding userver dependency
 find_package(userver COMPONENTS core mongo grpc QUIET)
-if(NOT userver_FOUND)  # Fallback to subdirectory usage
-    # Enable userver libraries that are needed in this project
-    set(USERVER_FEATURE_MONGODB ON CACHE BOOL "" FORCE)
-    set(USERVER_FEATURE_GRPC ON CACHE BOOL "" FORCE)
-
-    # Compatibility mode: some systems don't support these features
-    set(USERVER_FEATURE_CRYPTOPP_BLAKE2 OFF CACHE BOOL "" FORCE)
-    set(USERVER_FEATURE_GRPC_CHANNELZ OFF CACHE BOOL "" FORCE)
-    set(USERVER_FEATURE_REDIS_HI_MALLOC ON CACHE BOOL "" FORCE)
-
-    if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/third_party/userver)
-        message(STATUS "Using userver framework from third_party/userver")
-        add_subdirectory(third_party/userver)
-    else()
-        message(FATAL_ERROR "Either install the userver or provide a path to it")
-    endif()
+if(NOT userver_FOUND)
+  # Tries TRY_DIR first, falls back to downloading userver from GitHub using CPM.
+  download_userver(TRY_DIR third_party/userver)
 endif()
 
 userver_setup_environment()

CMakePresets.json

@@ -0,0 +1,47 @@
+{
+  "version": 2,
+  "cmakeMinimumRequired": {
+    "major": 3,
+    "minor": 20,
+    "patch": 0
+  },
+  "configurePresets": [
+    {
+      "name": "debug",
+      "displayName": "Debug",
+      "description": "Fully featured Debug build",
+      "inherits": [
+        "common-flags"
+      ],
+      "binaryDir": "${sourceDir}/build_debug",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Debug",
+        "USERVER_SANITIZE": "addr;ub"
+      }
+    },
+    {
+      "name": "release",
+      "displayName": "Release",
+      "description": "Fully featured Release build",
+      "inherits": [
+        "common-flags"
+      ],
+      "binaryDir": "${sourceDir}/build_release",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Release"
+      }
+    },
+    {
+      "name": "common-flags",
+      "hidden": true,
+      "generator": "Ninja",
+      "cacheVariables": {
+        "CMAKE_EXPORT_COMPILE_COMMANDS": "ON",
+        "CMAKE_C_COMPILER": "cc",
+        "CMAKE_CXX_COMPILER": "c++",
+        "USERVER_FEATURE_MONGODB": "ON",
+        "USERVER_FEATURE_GRPC": "ON"
+      }
+    }
+  ]
+}

Makefile

@@ -1,6 +1,6 @@
 CMAKE_COMMON_FLAGS ?= -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
-CMAKE_DEBUG_FLAGS ?= -DUSERVER_SANITIZE='addr ub'
-CMAKE_RELEASE_FLAGS ?=
+CMAKE_DEBUG_FLAGS ?= --preset debug
+CMAKE_RELEASE_FLAGS ?= --preset release
 NPROCS ?= $(shell nproc)
 CLANG_FORMAT ?= clang-format
 DOCKER_COMPOSE ?= docker-compose

cmake/DownloadUserver.cmake

@@ -0,0 +1,37 @@
+include_guard(GLOBAL)
+
+function(download_userver)
+  set(OPTIONS)
+  set(ONE_VALUE_ARGS TRY_DIR VERSION GIT_TAG)
+  set(MULTI_VALUE_ARGS)
+  cmake_parse_arguments(
+      ARG "${OPTIONS}" "${ONE_VALUE_ARGS}" "${MULTI_VALUE_ARGS}" ${ARGN}
+  )
+
+  if(ARG_TRY_DIR)
+    get_filename_component(ARG_TRY_DIR "${ARG_TRY_DIR}" REALPATH)
+    if(EXISTS "${ARG_TRY_DIR}")
+      message(STATUS "Using userver from ${ARG_TRY_DIR}")
+      add_subdirectory("${ARG_TRY_DIR}" third_party/userver)
+      return()
+    endif()
+  endif()
+
+  include(get_cpm)
+
+  if(NOT DEFINED ARG_VERSION AND NOT DEFINED ARG_GIT_TAG)
+    set(ARG_GIT_TAG develop)
+  endif()
+
+  if(NOT DEFINED CPM_USE_NAMED_CACHE_DIRECTORIES)
+    set(CPM_USE_NAMED_CACHE_DIRECTORIES ON)
+  endif()
+
+  CPMAddPackage(
+      NAME userver
+      GITHUB_REPOSITORY userver-framework/userver
+      VERSION ${ARG_VERSION}
+      GIT_TAG ${ARG_GIT_TAG}
+      ${ARG_UNPARSED_ARGUMENTS}
+  )
+endfunction()

cmake/get_cpm.cmake

@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: MIT
+#
+# SPDX-FileCopyrightText: Copyright (c) 2019-2023 Lars Melchior and contributors
+
+set(CPM_DOWNLOAD_VERSION 0.40.2)
+set(CPM_HASH_SUM "c8cdc32c03816538ce22781ed72964dc864b2a34a310d3b7104812a5ca2d835d")
+
+if(CPM_SOURCE_CACHE)
+  set(CPM_DOWNLOAD_LOCATION "${CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
+elseif(DEFINED ENV{CPM_SOURCE_CACHE})
+  set(CPM_DOWNLOAD_LOCATION "$ENV{CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
+else()
+  set(CPM_DOWNLOAD_LOCATION "${CMAKE_BINARY_DIR}/cmake/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
+endif()
+
+# Expand relative path. This is important if the provided path contains a tilde (~)
+get_filename_component(CPM_DOWNLOAD_LOCATION ${CPM_DOWNLOAD_LOCATION} ABSOLUTE)
+
+file(DOWNLOAD
+    https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
+    ${CPM_DOWNLOAD_LOCATION} EXPECTED_HASH SHA256=${CPM_HASH_SUM}
+)
+
+include(${CPM_DOWNLOAD_LOCATION})