reproduce-pygit2-differror

diff-error.py

import subprocess
import pygit2
import tempfile

REPODIR = tempfile.mkdtemp() + '/errrepo'

repo = pygit2.init_repository(REPODIR)

# create invalid tree with empty dir
emptyTree = repo.TreeBuilder().write()
treeBuilder = repo.TreeBuilder()
treeBuilder.insert('EmptyDir', emptyTree, pygit2.GIT_FILEMODE_TREE)  # <- OMIT THIS LINE AND EVERYTHING WORKS
treeBuilder.insert('datafile', repo.create_blob('data'), pygit2.GIT_FILEMODE_BLOB_EXECUTABLE)
invalidTreeId = treeBuilder.write()

commitId = repo.create_commit(
    None,
    pygit2.Signature('User', 'user@git', 0, 0),
    pygit2.Signature('User', 'user@git', 0, 0),
    'commit msg',
    invalidTreeId,
    [])

diff = repo.diff(emptyTree.hex, commitId.hex)
pygit2diff = {p.delta.new_file.path for p in diff}
gitdiff = set(subprocess.check_output(['git', 'diff', '--name-only', emptyTree.hex, commitId.hex], cwd=REPODIR).splitlines())
assert pygit2diff == gitdiff, '{!r} != {!r}'.format(pygit2diff, gitdiff)