Linux/OSX	Windows

Example of downloading/installing dependencies using Hunter package manager.

Requirements

• CMake version 3.0

Usage

• Set HUNTER_ROOT environment variable (recommended, see alternatives)
• Generate project: cmake -H. -B_builds -DHUNTER_STATUS_DEBUG=ON -DCMAKE_BUILD_TYPE=Debug
• Run build: cmake --build _builds --config Debug
• Run test: cd _builds && ctest -C Debug -VV

Output

• Download starts in HUNTER_ROOT directory:

-- [hunter] Initializing Hunter workspace (0ccc3f3fd571676a1804723984598f9f90a4d6bc)
-- [hunter]   https://github.com/ruslo/hunter/archive/v0.12.40.tar.gz
-- [hunter]   -> /home/travis/.hunter/_Base/Download/Hunter/0.12.40/0ccc3f3

• After download done cmake variable HUNTER_ROOT set:

-- [hunter] HUNTER_ROOT: /home/travis/.hunter

• Requested package GTest will be downloaded using wrapped ExternalProject_Add command:

-- [hunter] GTEST_ROOT: /home/travis/.hunter/_Base/0ccc3f3/b874e31/3ef6df8/Install (ver.: 1.7.0-hunter-11)

• If local configuration match binary cache from server then it will be used without building from sources:

https://raw.githubusercontent.com/ingenue/hunter-cache/.../cache.sha1
  -> /home/travis/.hunter/_Base/Cache/meta/.../cache.sha1
Cache HIT: GTest
https://github.com/ingenue/hunter-cache/.../da62fc35901e07d30db7a1c19b7358855978e11f.tar.bz2
  -> /home/travis/.hunter/_Base/Cache/raw/da62fc35901e07d30db7a1c19b7358855978e11f.tar.bz2

Note: since cache uploaded from Travis/AppVeyor CI hence configuration will always match.

Usage (toolchains)

Build functionality can be extended using toolchains:

• Download toolchains archive (unix-style):

> export POLLY_VERSION="0.9.0"
> wget "https://github.com/ruslo/polly/archive/v${POLLY_VERSION}.tar.gz"
> tar xf "v${POLLY_VERSION}.tar.gz"
> export POLLY_ROOT="`pwd`/polly-${POLLY_VERSION}" # not needed in general
> export PATH="${POLLY_ROOT}/bin:${PATH}"

• Now build.py python3 script from ${POLLY_ROOT}/bin directory can be used to start for example Xcode project:

> build.py --toolchain xcode --open --nobuild --verbose

This script equivalent to:

> cmake -H. -B_builds/xcode -DHUNTER_STATUS_DEBUG=ON -DCMAKE_TOOLCHAIN_FILE=${POLLY_ROOT}/xcode.cmake -GXcode
> open _builds/xcode/HunterSimple.xcodeproj

Check GTest directories:

/home/travis/.hunter/_Base/0ccc3f3/b874e31/3ef6df8/Install # install directory
/home/travis/.hunter/_Base/Download/GTest/1.7.0-hunter-11/c6ae948/ # path to downloaded archive

For building with iOS need to be used patched version of CMake

More

• Travis CI config for Linux/OSX
• AppVeyor config for Windows
• Weather (Boost, CppNetlib.URI, GTest, JSON Spirit)