Script to reproduce https://github.com/libgit2/pygit2/issues/625 by running ``vagrant up`` and ``vagrant ssh -- reproduce_memleak.py``

reproduce-pygit2-memleak.py

import pygit2
import os
import subprocess


SAMPLE_REPO_DIR = '/home/vagrant/libgit2'


sampleRepo = pygit2.Repository(SAMPLE_REPO_DIR)
master = sampleRepo.revparse_single('master')
diffCommit = master
for srcCommit in sampleRepo.walk(master.id, pygit2.GIT_SORT_REVERSE):
    topCmd = ['top', '-b', '-n', '1', '-p', str(os.getpid())]
    usedMemory = subprocess.check_output(topCmd).splitlines()[-1][24:30]
    print "Currently Used Memory:", usedMemory, "kB"

    # Also I call only this function, memory usage will grow and grow
    sampleRepo.diff(diffCommit, diffCommit)

    diffCommit = srcCommit

Vagrantfile

Vagrant.configure(2) do |config|
  config.vm.box = "ubuntu/trusty32"
  config.vm.provision "shell", inline: <<-SHELL
    # install components required for building libgit2 / pygit2
    sudo apt-get install -y git
    sudo apt-get install -y cmake
    sudo apt-get install -y --fix-missing python-pip   # ignore missing server
    sudo apt-get install -y python-dev
    sudo apt-get install -y python-cffi

    # build and install libgit2
    cd /home/vagrant
    sudo -u vagrant git clone https://github.com/libgit2/libgit2.git
    cd libgit2
    sudo -u vagrant git checkout v0.24.1
    sudo -u vagrant mkdir build
    cd build
    sudo -u vagrant cmake ..
    sudo -u vagrant make
    sudo make install
    sudo ldconfig

    # install pygit2
    sudo pip install pygit2==0.24.0
  SHELL
end