cd ~/.local/src/
git clone git://github.com/libgit2/libgit2.git
cd libgit2
mkdir build && cd build
cmake ..
cmake --build .
If debugging, use the following cmake commands instead:
cmake -DCMAKE_BUILD_TYPE=Debug ..
cmake --build .
sudo cmake --build . --target install
This will install libgit2 in /usr/local. In my case, libgit2's install command did not call ldconfig, so I had to do it manually:
sudo ldconfig
Confirm that libgit2 can be found:
ldconfig -p | grep libgit
This should output the paths to libgit2.so.0 and libgit2.so.
At this point, you should be able to install pygit2.
sudo -H pip install pygit2