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
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
# coding: utf-8
#
# blogc: A blog compiler.
# Copyright (C) 2016 Rafael G. Martins <rafael@rafaelmartins.eng.br>
#
# This program can be distributed under the terms of the BSD License.
# See the license for details.
#
from contextlib import closing
from StringIO import StringIO
import base64
import boto3
import hashlib
import json
import mimetypes
import os
import subprocess
import tarfile
import urllib2
import shutil
cwd = os.path.dirname(os.path.abspath(__file__))
bindir = os.path.join(cwd, 'bin')
os.environ['PATH'] = '%s:%s' % (bindir, os.environ.get('PATH', ''))
s3 = boto3.resource('s3')
GITHUB_AUTH = os.environ.get('GITHUB_AUTH')
if GITHUB_AUTH is not None and ':' not in GITHUB_AUTH:
GITHUB_AUTH = boto3.client('kms').decrypt(
CiphertextBlob=base64.b64decode(GITHUB_AUTH))['Plaintext']
# this is just a safeguard, just in case lambda stops supporting symlinks
# in zip files
for binary in subprocess.check_output([os.path.join(bindir, 'busybox'),
'--list']).split():
dst = os.path.join(bindir, binary)
if not os.path.islink(dst):
os.symlink('busybox', dst)
else:
break # if one symlink exists, all the others will likely exist
def get_tarball(repo_name):
tarball_url = 'https://api.github.com/repos/%s/tarball/master' % repo_name
request = urllib2.Request(tarball_url)
if GITHUB_AUTH is not None:
auth = base64.b64encode(GITHUB_AUTH)
request.add_header("Authorization", "Basic %s" % auth)
with closing(urllib2.urlopen(request)) as fp:
tarball = fp.read()
rootdir = None
with closing(StringIO(tarball)) as fp:
with tarfile.open(fileobj=fp, mode='r:gz') as tar:
for f in tar.getnames():
if '/' not in f:
rootdir = f
break
if rootdir is None:
raise RuntimeError('Failed to find a directory in tarball')
rootdir = '/tmp/%s' % rootdir
if os.path.isdir(rootdir):
shutil.rmtree(rootdir)
tar.extractall('/tmp/')
return rootdir
def translate_filename(filename):
f = filename.split('/')
if len(f) == 0:
return filename
basename = f[-1]
# replace any index.$EXT file with index.html, because s3 only allows
# users to declare one directory index file name.
p = basename.split('.')
if len(p) == 2 and p[0] == 'index':
f[-1] = 'index.html'
return '/'.join(f)
return filename
def sync_s3(src, dest, settings_file):
settings = {}
if os.path.exists(settings_file):
with open(settings_file, 'r') as fp:
settings = json.load(fp)
content_types = settings.get('content-type', {})
dest = settings.get('bucket', dest)
bucket = s3.Bucket(dest)
remote_files = {}
for obj in bucket.objects.all():
if not obj.key.endswith('/'):
remote_files[obj.key] = obj
local_files = {}
for root, dirs, files in os.walk(src):
real_root = root[len(src):].lstrip('/')
for filename in files:
f = os.path.join(real_root, filename)
local_files[translate_filename(f)] = f
to_upload = []
for filename in local_files:
if filename not in remote_files:
to_upload.append(local_files[filename])
to_delete = []
for filename in remote_files:
if filename in local_files:
with open(os.path.join(src, local_files[filename])) as fp:
l = hashlib.sha1(fp.read())
with closing(remote_files[filename].get()['Body']) as fp:
r = hashlib.sha1(fp.read())
if l.hexdigest() != r.hexdigest():
to_upload.append(local_files[filename])
else:
to_delete.append(filename)
for filename in to_upload:
with open(os.path.join(src, filename), 'rb') as fp:
mime = content_types.get(filename,
mimetypes.guess_type(filename)[0])
filename = translate_filename(filename)
print 'Uploading file: %s; content-type: "%s"' % (filename, mime)
if mime is not None:
bucket.put_object(Key=filename, Body=fp, ContentType=mime)
else:
bucket.put_object(Key=filename, Body=fp)
for filename in to_delete:
print 'Deleting file:', filename
remote_files[filename].delete()
def lambda_handler(event, context):
message = event['Records'][0]['Sns']['Message']
payload = json.loads(message)
if payload['ref'] == 'refs/heads/master':
debug = 'DEBUG' in os.environ
stream = None if debug else subprocess.PIPE
rootdir = get_tarball(payload['repository']['full_name'])
rv = subprocess.call([os.path.join(bindir, 'make'), '-C', rootdir,
'BLOGC=%s' % os.path.join(bindir, 'blogc'),
'OUTPUT_DIR=_build'],
stdout=stream, stderr=stream)
if rv != 0:
raise RuntimeError('Failed to run make')
sync_s3(os.path.join(rootdir, '_build'),
payload['repository']['name'],
os.path.join(rootdir, 's3.json'))
|
