1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
"""Miscellaneous utility functions for git structures"""
from base64 import b16encode
import zlib
from pomu.util.result import Result
def parse_tree(blob, path=b''):
"""Parses a git tree"""
res = []
leng, _, tree = blob.partition(b'\0')
if path is str:
path = path.encode('utf-8')
if not tree:
return Result.Err('Invalid tree')
while len(tree) > 0:
mode, _, tree = tree.partition(b' ')
name, _, tree = tree.partition(b'\0')
sha = b16encode(tree[0:20]).decode('utf-8').lower()
tree = tree[20:]
if not name or not sha:
return Result.Err()
is_dir = mode[0:1] != b'1'
res.append((is_dir, sha, path + b'/' + name))
return Result.Ok(res)
def parse_blob(blob):
"""Parses a git blob"""
leng, _, data = blob.partition(b'\0')
if not leng or not data:
return Result.Err()
return Result.Ok(data)
def commit_head(blob):
if not blob[7:] == 'commit ':
return Result.Err()
l = blob.split('\n')[0]
cid, _, tid = l.partition('\0')
if not tid[0:5] == 'tree ':
return Result.Err()
return tid[5:]
def parse_object(obj, tpath=b''):
"""Parses a git object"""
if tpath is str:
tpath = tpath.encode('utf-8')
data = zlib.decompress(obj)
if data[0:5] == b'blob ':
return parse_blob(data[5:])
elif data[0:5] == b'tree ':
return parse_tree(data[5:], tpath)
return Result.Err('Unsupported object type')
|
GitWeb
