# 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
+from colors import red, green, yellow
+from progress.bar import Bar
+
+
+class FatalError(Exception):
+ pass
+
+
+silent = False
def get_command(command):
return find_sbin_command(command, e)
-def error(msg):
- puts_err(colored.red("Error: %s\n" % msg))
+def error(msg, new_line=True):
+ nl = "\n" if new_line else ''
+ sys.stderr.write(red('Error: %s' % msg) + nl)
+
+
+def warn(msg, new_line=True):
+ if not silent:
+ nl = "\n" if new_line else ''
+ sys.stderr.write(yellow("Warning: %s" % msg) + nl)
+
+
+def success(msg, new_line=True):
+ if not silent:
+ nl = "\n" if new_line else ''
+ sys.stdout.write(green(msg) + nl)
+ if not nl:
+ sys.stdout.flush()
+
+
+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 progress(message='', bar_type="default"):
+
+ MESSAGE_LENGTH = 30
+
+ suffix = {
+ 'default': '%(index)d/%(max)d',
+ 'percent': '%(percent)d%%',
+ 'b': '%(index)d/%(max)d B',
+ 'kb': '%(index)d/%(max)d KB',
+ 'mb': '%(index)d/%(max)d MB'
+ }
+
+ bar = Bar()
+ bar.message = message.ljust(MESSAGE_LENGTH)
+ bar.fill = '#'
+ bar.suffix = suffix[bar_type]
+ bar.bar_prefix = ' ['
+ bar.bar_suffix = '] '
+ return bar
-def warn(msg):
- puts_err(colored.yellow("Warning: %s" % msg))
+def md5(filename, size):
-def success(msg):
- puts(colored.green(msg))
+ BLOCKSIZE = 2 ** 22 # 4MB
+ progressbar = progress("Calculating md5sum:", 'mb')
+ progressbar.max = ((size + 2 ** 20 - 1) // (2 ** 20))
+ 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) // (2 ** 20))
-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
+ checksum = md5.hexdigest()
+ output("\rCalculating md5sum...\033[K", False)
+ success(checksum)
+ return checksum
# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :