# interpreted as representing official policies, either expressed
# or implied, of GRNET S.A.
+import sys
import pbs
-from clint.textui import puts, puts_err, colored, progress
+import hashlib
+
+
+class FatalError(Exception):
+ pass
def get_command(command):
return find_sbin_command(command, e)
-def error(msg, new_line=True):
- puts_err(colored.red("Error: %s\n" % msg), new_line)
-
+class MD5:
+ def __init__(self, output):
+ self.out = output
-def warn(msg, new_line=True):
- puts_err(colored.yellow("Warning: %s" % msg), new_line)
+ def compute(self, filename, size):
+ MB = 2 ** 20
+ BLOCKSIZE = 4 * MB # 4MB
-def success(msg, new_line=True):
- puts(colored.green(msg), new_line)
+ 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)
+ checksum = md5.hexdigest()
+ progressbar.success(checksum)
-def progress_generator(label='', n=100):
- position = 0
- for i in progress.bar(range(n), label):
- if i < position:
- continue
- position = yield
- yield # suppress the StopIteration exception
+ return checksum
# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :