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test_fun.py
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# This module is part of GitPython and is released under the
# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
from io import BytesIO
from stat import S_IFDIR, S_IFREG, S_IFLNK, S_IXUSR
import os
import os.path as osp
import pytest
from git import Git
from git.exc import GitCommandError
from git.index import IndexFile
from git.index.fun import (
aggressive_tree_merge,
stat_mode_to_index_mode,
)
from git.objects.fun import (
traverse_tree_recursive,
traverse_trees_recursive,
tree_to_stream,
tree_entries_from_data,
)
from git.repo.fun import find_worktree_git_dir
from test.lib import TestBase, with_rw_repo, with_rw_directory
from git.util import bin_to_hex, cygpath, join_path_native
from gitdb.base import IStream
from gitdb.typ import str_tree_type
class TestFun(TestBase):
def _assert_index_entries(self, entries, trees):
index = IndexFile.from_tree(self.rorepo, *[self.rorepo.tree(bin_to_hex(t).decode("ascii")) for t in trees])
assert entries
assert len(index.entries) == len(entries)
for entry in entries:
assert (entry.path, entry.stage) in index.entries
# END assert entry matches fully
@pytest.mark.xfail(
os.name == "nt",
reason=(
"IndexFile.from_tree is broken on Windows (related to NamedTemporaryFile), see #1630.\n"
"'git read-tree --index-output=...' fails with 'fatal: unable to write new index file'."
),
raises=GitCommandError,
)
def test_aggressive_tree_merge(self):
# Head tree with additions, removals and modification compared to its predecessor.
odb = self.rorepo.odb
HC = self.rorepo.commit("6c1faef799095f3990e9970bc2cb10aa0221cf9c")
H = HC.tree
B = HC.parents[0].tree
# Entries from single tree.
trees = [H.binsha]
self._assert_index_entries(aggressive_tree_merge(odb, trees), trees)
# From multiple trees.
trees = [B.binsha, H.binsha]
self._assert_index_entries(aggressive_tree_merge(odb, trees), trees)
# Three way, no conflict.
tree = self.rorepo.tree
B = tree("35a09c0534e89b2d43ec4101a5fb54576b577905")
H = tree("4fe5cfa0e063a8d51a1eb6f014e2aaa994e5e7d4")
M = tree("1f2b19de3301e76ab3a6187a49c9c93ff78bafbd")
trees = [B.binsha, H.binsha, M.binsha]
self._assert_index_entries(aggressive_tree_merge(odb, trees), trees)
# Three-way, conflict in at least one file, both modified.
B = tree("a7a4388eeaa4b6b94192dce67257a34c4a6cbd26")
H = tree("f9cec00938d9059882bb8eabdaf2f775943e00e5")
M = tree("44a601a068f4f543f73fd9c49e264c931b1e1652")
trees = [B.binsha, H.binsha, M.binsha]
self._assert_index_entries(aggressive_tree_merge(odb, trees), trees)
# Too many trees.
self.assertRaises(ValueError, aggressive_tree_merge, odb, trees * 2)
def mktree(self, odb, entries):
"""Create a tree from the given tree entries and safe it to the database."""
sio = BytesIO()
tree_to_stream(entries, sio.write)
sio.seek(0)
istream = odb.store(IStream(str_tree_type, len(sio.getvalue()), sio))
return istream.binsha
@with_rw_repo("0.1.6")
def test_three_way_merge(self, rwrepo):
def mkfile(name, sha, executable=0):
return (sha, S_IFREG | 0o644 | executable * 0o111, name)
def mkcommit(name, sha):
return (sha, S_IFDIR | S_IFLNK, name)
def assert_entries(entries, num_entries, has_conflict=False):
assert len(entries) == num_entries
assert has_conflict == (len([e for e in entries if e.stage != 0]) > 0)
mktree = self.mktree
shaa = b"\1" * 20
shab = b"\2" * 20
shac = b"\3" * 20
odb = rwrepo.odb
# Base tree.
bfn = "basefile"
fbase = mkfile(bfn, shaa)
tb = mktree(odb, [fbase])
# Non-conflicting new files, same data.
fa = mkfile("1", shab)
th = mktree(odb, [fbase, fa])
fb = mkfile("2", shac)
tm = mktree(odb, [fbase, fb])
# Two new files, same base file.
trees = [tb, th, tm]
assert_entries(aggressive_tree_merge(odb, trees), 3)
# Both delete same file, add own one.
fa = mkfile("1", shab)
th = mktree(odb, [fa])
fb = mkfile("2", shac)
tm = mktree(odb, [fb])
# Two new files.
trees = [tb, th, tm]
assert_entries(aggressive_tree_merge(odb, trees), 2)
# Same file added in both, differently.
fa = mkfile("1", shab)
th = mktree(odb, [fa])
fb = mkfile("1", shac)
tm = mktree(odb, [fb])
# Expect conflict.
trees = [tb, th, tm]
assert_entries(aggressive_tree_merge(odb, trees), 2, True)
# Same file added, different mode.
fa = mkfile("1", shab)
th = mktree(odb, [fa])
fb = mkcommit("1", shab)
tm = mktree(odb, [fb])
# Expect conflict.
trees = [tb, th, tm]
assert_entries(aggressive_tree_merge(odb, trees), 2, True)
# Same file added in both.
fa = mkfile("1", shab)
th = mktree(odb, [fa])
fb = mkfile("1", shab)
tm = mktree(odb, [fb])
# Expect conflict.
trees = [tb, th, tm]
assert_entries(aggressive_tree_merge(odb, trees), 1)
# Modify same base file, differently.
fa = mkfile(bfn, shab)
th = mktree(odb, [fa])
fb = mkfile(bfn, shac)
tm = mktree(odb, [fb])
# Conflict, 3 versions on 3 stages.
trees = [tb, th, tm]
assert_entries(aggressive_tree_merge(odb, trees), 3, True)
# Change mode on same base file, by making one a commit, the other executable,
# no content change (this is totally unlikely to happen in the real world).
fa = mkcommit(bfn, shaa)
th = mktree(odb, [fa])
fb = mkfile(bfn, shaa, executable=1)
tm = mktree(odb, [fb])
# Conflict, 3 versions on 3 stages, because of different mode.
trees = [tb, th, tm]
assert_entries(aggressive_tree_merge(odb, trees), 3, True)
for is_them in range(2):
# Only we/they change contents.
fa = mkfile(bfn, shab)
th = mktree(odb, [fa])
trees = [tb, th, tb]
if is_them:
trees = [tb, tb, th]
entries = aggressive_tree_merge(odb, trees)
assert len(entries) == 1 and entries[0].binsha == shab
# Only we/they change the mode.
fa = mkcommit(bfn, shaa)
th = mktree(odb, [fa])
trees = [tb, th, tb]
if is_them:
trees = [tb, tb, th]
entries = aggressive_tree_merge(odb, trees)
assert len(entries) == 1 and entries[0].binsha == shaa and entries[0].mode == fa[1]
# One side deletes, the other changes = conflict.
fa = mkfile(bfn, shab)
th = mktree(odb, [fa])
tm = mktree(odb, [])
trees = [tb, th, tm]
if is_them:
trees = [tb, tm, th]
# As one is deleted, there are only 2 entries.
assert_entries(aggressive_tree_merge(odb, trees), 2, True)
# END handle ours, theirs
def test_stat_mode_to_index_mode(self):
modes = (
0o600,
0o611,
0o640,
0o641,
0o644,
0o650,
0o651,
0o700,
0o711,
0o740,
0o744,
0o750,
0o751,
0o755,
)
for mode in modes:
expected_mode = S_IFREG | (mode & S_IXUSR and 0o755 or 0o644)
assert stat_mode_to_index_mode(mode) == expected_mode
# END for each mode
def _assert_tree_entries(self, entries, num_trees):
for entry in entries:
assert len(entry) == num_trees
paths = {e[2] for e in entry if e}
# Only one path per set of entries.
assert len(paths) == 1
# END verify entry
def test_tree_traversal(self):
# Low level tree traversal.
odb = self.rorepo.odb
H = self.rorepo.tree("29eb123beb1c55e5db4aa652d843adccbd09ae18") # head tree
M = self.rorepo.tree("e14e3f143e7260de9581aee27e5a9b2645db72de") # merge tree
B = self.rorepo.tree("f606937a7a21237c866efafcad33675e6539c103") # base tree
B_old = self.rorepo.tree("1f66cfbbce58b4b552b041707a12d437cc5f400a") # old base tree
# Two very different trees.
entries = traverse_trees_recursive(odb, [B_old.binsha, H.binsha], "")
self._assert_tree_entries(entries, 2)
oentries = traverse_trees_recursive(odb, [H.binsha, B_old.binsha], "")
assert len(oentries) == len(entries)
self._assert_tree_entries(oentries, 2)
# Single tree.
is_no_tree = lambda i, d: i.type != "tree"
entries = traverse_trees_recursive(odb, [B.binsha], "")
assert len(entries) == len(list(B.traverse(predicate=is_no_tree)))
self._assert_tree_entries(entries, 1)
# Two trees.
entries = traverse_trees_recursive(odb, [B.binsha, H.binsha], "")
self._assert_tree_entries(entries, 2)
# Three trees.
entries = traverse_trees_recursive(odb, [B.binsha, H.binsha, M.binsha], "")
self._assert_tree_entries(entries, 3)
def test_tree_traversal_single(self):
max_count = 50
count = 0
odb = self.rorepo.odb
for commit in self.rorepo.commit("29eb123beb1c55e5db4aa652d843adccbd09ae18").traverse():
if count >= max_count:
break
count += 1
entries = traverse_tree_recursive(odb, commit.tree.binsha, "")
assert entries
# END for each commit
@with_rw_directory
def test_linked_worktree_traversal(self, rw_dir):
"""Check that we can identify a linked worktree based on a .git file."""
git = Git(rw_dir)
if git.version_info[:3] < (2, 5, 1):
raise RuntimeError("worktree feature unsupported (test needs git 2.5.1 or later)")
rw_master = self.rorepo.clone(join_path_native(rw_dir, "master_repo"))
branch = rw_master.create_head("aaaaaaaa")
worktree_path = join_path_native(rw_dir, "worktree_repo")
if Git.is_cygwin():
worktree_path = cygpath(worktree_path)
rw_master.git.worktree("add", worktree_path, branch.name)
dotgit = osp.join(worktree_path, ".git")
statbuf = os.stat(dotgit)
self.assertTrue(statbuf.st_mode & S_IFREG)
gitdir = find_worktree_git_dir(dotgit)
self.assertIsNotNone(gitdir)
statbuf = os.stat(gitdir)
self.assertTrue(statbuf.st_mode & S_IFDIR)
def test_tree_entries_from_data_with_failing_name_decode_py3(self):
r = tree_entries_from_data(b"100644 \x9f\0aaa")
assert r == [(b"aaa", 33188, "\udc9f")], r