C++ experience (+10y)*

Side projects!

Let's do some WWW

C++ PHP Python

NLP

Twitter bot

Scrape, classify (NLP), monitor, tweet  

Telegram bot

Commands, scrape, bot  

ADIF + Renfe

C++ side projects

All speculative

   make && sudo make install

 ?

I want my job done!

Act. II

I had a dream

Face recognition

Face recognition

Find a nice how-to

It uses opencv/3.4.5

Piece of cake!

Posting to Twitter

Here it is something promising

C libraries, different build systems,...

Child's play!

My dream

Someone else's work

Act. III

Conan, C/C++ package manager

Conan.io

Development team:

Join us! We are hiring!

Main features

Reuse binaries (if you want)

Integrates with any build system

3rd parties & your libraries

Non intrusive

Key components

Reference

Package ID

name/version:package_id

Reference

'name' and 'version' of the library

boost/1.71.0

openssl/1.1.1d

Package ID

Unique identifier of the binaries

Other components

• Profiles
• Generators
• Build helpers

Hello world! application

Consume some libraries ( | )

                            [requires]
                            hellolib/0.1
                            fmt/6.0.0
                        

using CMake

                            [generators]
                            cmake_find_package
                        

conanfile.py

1) Declare your settings and dependencies

                            from conans import ConanFile, CMake

                            class HelloLib(ConanFile):
                                name = "hellolib"
                                version = "1.0"

                                settings = "os", "arch", "compiler", "build_type"
                                options = {"shared": [True, False]}
                                default_options = {"shared": False}

                                requires = "fmt/6.0.0"
                        

conanfile.py

2) Where to get the sources

                            from conans import ConanFile, CMake

                            class HelloLib(ConanFile):
                                ...
                                exports_sources = "include/*", "src/*", "CMakeLists.txt", "README.md"
                                # scm = {"type": "git",
                                #        "revision": "auto",
                                #        "url": "auto"}

                                # def source(self):
                                #     # Write your own function
                                #     tools.get(url="...", sha1="...")
                                #     os.rename("name-version", "source_folder")
                        

conanfile.py

2) Where to get the sources

                            from conans import ConanFile, CMake

                            class HelloLib(ConanFile):
                                ...
                                # exports_sources = "include/*", "src/*", "CMakeLists.txt", "README.md"
                                scm = {"type": "git",
                                       "revision": "auto",
                                       "url": "auto"}

                                # def source(self):
                                #     # Write your own function
                                #     tools.get(url="...", sha1="...")
                                #     os.rename("name-version", "source_folder")
                        

conanfile.py

2) Where to get the sources

                            from conans import ConanFile, CMake

                            class HelloLib(ConanFile):
                                ...
                                # exports_sources = "include/*", "src/*", "CMakeLists.txt", "README.md"
                                # scm = {"type": "git",
                                #        "revision": "auto",
                                #        "url": "auto"}

                                def source(self):
                                    # Write your own function
                                    tools.get(url="...", sha1="...")
                                    os.rename("name-version", "source_folder")
                        

conanfile.py

3) How to build your library

                            from conans import ConanFile, CMake, tools

                            class HelloLib(ConanFile):
                                ...
                                generators = "cmake", "cmake_find_package"

                                def build(self):
                                    cmake = CMake(self)
                                    cmake.configure()
                                    cmake.build()
                        

conanfile.py

4) What files to package

                            from conans import ConanFile, CMake, tools

                            class HelloLib(ConanFile):
                                ...

                                def package(self):
                                    cmake = CMake(self)
                                    cmake.configure()
                                    cmake.install()  # Or copy the files yourself
                                    self.copy("LICENSE.txt", dst="licenses", src=self._source_subfolder)
                        

conanfile.py

5) Information for consumers/generators

                            from conans import ConanFile, CMake, tools

                            class HelloLib(ConanFile):
                                ...

                                def package_info(self):
                                    self.cpp_info.libs = ["hellolib"]
                                    self.cpp_info.defines = ["WITH_HELLO_LIB"]
                        

Publish your package (CI)

Create/test the package

                            conan create path/to/conanfile.py --profile=macos-11-release
                        

Upload to your server

                            conan upload name/version@ --all --remote=my-private
                        

Act. IV

Conan at your company

Major pains

• Divide your monolith
• Developers: less to compile
• DevOps: reduce CI times
• Traceability and reproducibility

What Conan offers

• Take advantage of community contributed recipes
• Package your own libraries
• Keep using your existing build system
• Integrate with Artifactory, all your binaries together

C++ ecosystem is ready

and you?