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|
#!/usr/bin/env python
import fnmatch
import os
import sys
import time
from urllib.request import urlopen
from urllib.error import HTTPError
__version__ = '1.0.0'
class PipelineSpecError(Exception):
pass
class PipelineSpec:
def __init__(self, filename):
self.filename = filename
self.data = list()
self._read()
def replace(self, old, new):
for idx, record in enumerate(self.data):
parts = record.split('/')
for part in parts:
if part == old:
self.data[idx] = record.replace(old, new)
break
def search(self, pattern):
for record in self.data:
if fnmatch.fnmatch(record, pattern):
yield record
def verify(self):
with open(self.filename, 'r') as fp:
for line in fp:
if line.startswith('@EXPLICIT'):
return True
return False
def _read(self):
if not self.verify():
raise PipelineSpecError('Invalid spec file: {}'.format(self.filename))
with open(self.filename, 'r') as fp:
data = list()
for line in fp:
line = line.strip()
if not line or line.startswith('#') or line.startswith('@'):
continue
data.append(line)
self.data = data
class Backup:
def __init__(self, data, destination):
assert isinstance(data, list)
assert isinstance(destination, str)
self.block_size = 0xFFFF
self.destination = os.path.normpath(destination)
self.data = data
self.stats = dict(
read=0,
written=0,
success=0,
skipped=0,
fatal=list(),
fail=list(),
)
def run(self):
for url in self.data:
self._download(url)
def show_stats(self):
print("### Statistics ###")
for key, value in self.stats.items():
fmt = '{:<10s}: {:<20d}'
if isinstance(value, list):
if len(value) != 0:
fmt += '\n=>'
print(fmt.format(key, len(value)))
for url, reason in value:
print(' [{}] {}'.format(reason, url))
continue
if key == 'read' or key == 'written':
value = value / (1024 ** 2)
fmt = '{:<10s}: {:<.02f}MB'
print(fmt.format(key, value))
def _download(self, url):
path, filename = self._determine_local_path(url)
dirpath = os.path.join(self.destination, path)
fullpath = os.path.join(dirpath, filename)
block_size = self.block_size
if not os.path.exists(dirpath):
os.makedirs(dirpath)
elif os.path.exists(fullpath):
self.stats['skipped'] += 1
return
try:
with urlopen(url) as data:
with open(fullpath, 'w+b') as fp:
if self.verbose:
print("Writing: {}".format(fullpath))
chunk = data.read(block_size)
self.stats['read'] += len(chunk)
while chunk:
fp.write(chunk)
self.stats['written'] += len(chunk)
chunk = data.read(block_size)
self.stats['read'] += len(chunk)
except HTTPError as reason:
self.stats['fail'].append([url, reason])
return
except Exception as reason:
self.stats['fatal'].append([url, reason])
self.stats['success'] += 1
def _determine_local_path(self, record):
assert isinstance(record, str)
filename = os.path.basename(record)
markers = []
for i, ch in enumerate(record):
if ch == '/':
markers.append(i)
markers_len = len(markers)
if markers_len < 3:
raise ValueError('Invalid URL part length')
begin = markers[markers_len - 3] + 1 # start after leading slash
end = markers[markers_len - 1]
local_path = os.path.normpath(os.path.join(
self.destination, record[begin:end]))
return local_path, filename
def find_specs(search_path, pattern):
""" Compile list of spec file paths
"""
for root, dirs, files in os.walk(search_path):
for filename in files:
filename = os.path.join(root, filename)
if fnmatch.fnmatch(filename, pattern):
yield filename
if __name__ == '__main__':
import argparse
parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('--basedir', '-d', default='.',
help='Search for spec files under this path')
parser.add_argument('--extension', '-e', default='*-py*.txt',
help='Match spec file extension by glob')
parser.add_argument('--search-pattern', '-s', default='*',
help='Return packages from spec files matching glob pattern')
parser.add_argument('--replace-pattern', '-r', action='append',
default=list(), nargs='*', help='Replace pattern in package output strings')
parser.add_argument(
'--backup', '-b', help='Backup packages to root directory (preserve relative tree)')
parser.add_argument('--version', action='store_true')
args = parser.parse_args()
if args.version:
print(__version__)
exit(0)
info = list()
for spec in find_specs(args.basedir, args.extension):
pspec = PipelineSpec(spec)
for pattern in args.replace_pattern:
old, new = pattern
pspec.replace(old, new)
if args.search_pattern:
info += pspec.search(args.search_pattern)
else:
info += pspec.data
if not info:
print("No spec files found (extension: '{}')".format(args.extension), file=sys.stderr)
exit(0)
info = sorted(set(info))
if args.backup:
if not os.path.exists(args.backup):
os.makedirs(args.backup)
backup = Backup(info, args.backup)
backup.verbose = True
backup.run()
backup.show_stats()
else:
for x in info:
print(x)
|
