# or implied, of GRNET S.A.
import sys
-import pbs
-from clint.textui import colored, progress as uiprogress
+import sh
+import hashlib
-silent = False
+
+class FatalError(Exception):
+ pass
def get_command(command):
search_paths = ['/usr/local/sbin', '/usr/sbin', '/sbin']
for fullpath in map(lambda x: "%s/%s" % (x, command), search_paths):
if os.path.exists(fullpath) and os.access(fullpath, os.X_OK):
- return pbs.Command(fullpath)
+ return sh.Command(fullpath)
raise exception
try:
- return pbs.__getattr__(command)
- except pbs.CommadNotFount as e:
+ return sh.__getattr__(command)
+ except sh.CommadNotFount as e:
return find_sbin_command(command, e)
-def error(msg, new_line=True):
- nl = "\n" if new_line else ''
- sys.stderr.write('Error: %s' % msg + nl)
-
-
-def warn(msg, new_line=True):
- if not silent:
- nl = "\n" if new_line else ''
- sys.stderr.write(colored.yellow("Warning: %s" % msg) + nl)
-
-
-def success(msg, new_line=True):
- if not silent:
- nl = "\n" if new_line else ''
- sys.stdout.write(colored.green(msg) + nl)
- if not nl:
- sys.stdout.flush()
-
+class MD5:
+ def __init__(self, output):
+ self.out = output
-def output(msg="", new_line=True):
- if not silent:
- nl = "\n" if new_line else ''
- sys.stdout.write(msg + nl)
- if not nl:
- sys.stdout.flush()
+ def compute(self, filename, size):
+ MB = 2 ** 20
+ BLOCKSIZE = 4 * MB # 4MB
-def progress(label='', n=100):
+ prog_size = ((size + MB - 1) // MB) # in MB
+ progressbar = self.out.Progress(prog_size, "Calculating md5sum", 'mb')
+ md5 = hashlib.md5()
+ with open(filename, "r") as src:
+ left = size
+ while left > 0:
+ length = min(left, BLOCKSIZE)
+ data = src.read(length)
+ md5.update(data)
+ left -= length
+ progressbar.goto((size - left) // MB)
- PROGRESS_LENGTH = 32
- MESSAGE_LENGTH = 32
+ checksum = md5.hexdigest()
+ progressbar.success(checksum)
- def progress_generator(label, n):
- position = 0
- for i in uiprogress.bar(range(n), label.ljust(MESSAGE_LENGTH), \
- PROGRESS_LENGTH, silent):
- if i < position:
- continue
- position = yield
- yield # suppress the StopIteration exception
- return progress_generator(label, n)
+ return checksum
# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :