Installing C++ SDK

Using CMake

Assuming that your project is already using CMake, the easiest way to pull Touca as a dependency is to use CMake v3.11 or newer which includes CMake's FetchContent module.

FetchContent_Declare(
    touca
    GIT_REPOSITORY https://github.com/trytouca/trytouca
    GIT_TAG        v1.6.0
    SOURCE_SUBDIR  sdk/cpp
)
FetchContent_MakeAvailable(touca)

Building Extra Components

The above code pulls the latest stable release of the Touca SDK for C++ and generates a touca_client CMake target that you can link to.

We can use the slightly more verbose FetchContent_GetProperties pattern to customize the set of build targets, to include building Touca command-line application and example projects or to exclude building the test runner:

FetchContent_Declare(
    touca
    GIT_REPOSITORY https://github.com/trytouca/trytouca
    GIT_TAG        v1.6.0
    SOURCE_SUBDIR  sdk/cpp
)

FetchContent_GetProperties(touca)
if(NOT touca_POPULATED)
    FetchContent_Populate(touca)
    set(TOUCA_BUILD_CLI ON)
    set(TOUCA_BUILD_EXAMPLES ON)
    add_subdirectory(${touca_SOURCE_DIR})
endif()

Enabling HTTPS

The SDK has an optional dependency on OpenSSL for communicating with the Touca server over HTTPS. In most platforms, this library is automatically discovered and used by the build recipe. If OpenSSL is not installed in the default location, we may need to provide its root directory as a hint to the library’s build recipe. Here is a typical way to do so on macOS when OpenSSL is installed through homebrew.

set(OPENSSL_ROOT_DIR /opt/homebrew/opt/openssl@1.1)

Using Conan

As an alternative, you can use Conan to pull Touca as a dependency. Conan is a cross-platform package manager that enables efficient management of project dependencies. Refer to Conan documentation to learn more.

Setting Up Conan

If you do not have Conan locally installed, the preferred way to install it is through the Python Package Index using the pip command:

pip install conan

If this is the first time you are using Conan, we recommend that you setup a Conan profile based on your system environment.

conan profile new default --detect
conan profile update settings.compiler.libcxx=libstdc++11 default

Installing Touca

We can now install Touca using the Conan package manager. To do so, we first register Touca's Conan remote repository.

conan remote add touca-cpp https://getweasel.jfrog.io/artifactory/api/conan/touca-cpp

We can now ask Conan to install Touca as a dependency and generate a CMake find module that we can integrate with our build system.

conan install -if "${dir_build}" -g cmake_find_package -b missing "touca/1.6.0@_/_"

Where ${dir_build} is the path to the CMake build directory.

Discovering Conan Packages

Assuming we use ${dir_build} as our CMake binary directory, to discover and use the Conan-generated CMake find module we can ensure ${dir_build} is part of our CMake module path.

list(APPEND CMAKE_MODULE_PATH ${CMAKE_BINARY_DIR})
find_package("touca" QUIET)

This lets us link the Touca sdk with our project like any other library.

target_link_libraries(<YOUR_PROJECT> PRIVATE touca)

Building from Source

Requirements

You can build Touca on Linux, macOS, and Windows platforms. We support C++11 and newer standards. We use CMake as our build system. You would need CMake v3.14 or newer to build Touca. We formally support the following compilers:

Compiler	Min Version
x86-64 gcc	7.1
x86-64 clang	7.0.0
x64 MSVC	1900

Obtaining the Source Code

Touca SDK for C++ is available on GitHub under the Apache-2.0 license. Clone this repository to a directory of your choice. We refer to this directory as <project_directory>.

git clone git@github.com:trytouca/trytouca.git
cd sdk/cpp

Using Our Helper Script

Touca SDK for C++ has five main components.

Name	Build Argument
Core Library
Test Runner	--with-runner
Sample Test Tools	--with-examples
Command Line Tool	--with-cli
Unit Tests	--with-tests

We provide build scripts build.sh and build.bat for Unix and Windows platforms, respectively. The build scripts build the core library and the test runner by default. You can pass the appropriate argument shown in the table above to build other components as needed.

As an example, the command below builds all the components except the unit tests.

./build.sh --with-cli --with-examples

You can build all of the components using the --all argument.

./build.sh --all

Using CMake Directly

If, for any reason, you do not want to build Touca using our helper scripts, you can always use CMake directly. To do so, we recommend running the following command first, to configure the build targets and specify the path in which build artifacts should be generated. While you can change the build directory to the directory of your choice, the subsequent instructions assume the default value of ./local/build.

cmake -B"<project_directory>/local/build" -H"<project_directory>"

By default, the above-mentioned command configures CMake to build the core Touca Client Library. But Touca has several other components that can be enabled by passing the appropriate options to the command above, as listed in the table below.

Component Name	CMake Option	Default
Test Runner	TOUCA_BUILD_RUNNER	ON
Command Line Tool	TOUCA_BUILD_CLI	OFF
Sample Test Tools	TOUCA_BUILD_EXAMPLES	OFF
Unit Tests	TOUCA_BUILD_TESTS	OFF

As an example, the command below enables building sample Touca tests.

cmake -B"<project_directory>/local/build" -H"<project_directory>" -DTOUCA_BUILD_EXAMPLES=ON

We can build the source code via CMake which uses the native build tool of your platform.

cmake --build "<project_directory>/local/build" --parallel

Optionally, as a last step, we can install the build artifacts in a directory of our choice for easier packaging.

cmake --install "<project_directory>/local/build" --prefix "<project_directory>/local/dist"