Add support for GUID Partition Tables

[snf-image-creator] / image_creator / util.py

diff --git a/image_creator/util.py b/image_creator/util.py
index 1b4994a..d3d4cc0 100644 (file)
--- a/image_creator/util.py
+++ b/image_creator/util.py
@@ -33,7 +33,9 @@
 
 import sys
 import pbs
-from clint.textui import colored, progress as uiprogress
+import hashlib
+from colors import red, green, yellow
+from progress.bar import Bar
 
 
 class FatalError(Exception):
@@ -59,19 +61,19 @@ def get_command(command):
 
 def error(msg, new_line=True):
     nl = "\n" if new_line else ''
-    sys.stderr.write(colored.red('Error: %s' % msg) + nl)
+    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(colored.yellow("Warning: %s" % msg) + nl)
+        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(colored.green(msg) + nl)
+        sys.stdout.write(green(msg) + nl)
         if not nl:
             sys.stdout.flush()
 
@@ -84,19 +86,48 @@ def output(msg="", new_line=True):
             sys.stdout.flush()
 
 
-def progress(label='', n=100):
+def progress(message='', bar_type="default"):
 
-    PROGRESS_LENGTH = 32
-    MESSAGE_LENGTH = 32
+    MESSAGE_LENGTH = 30
 
-    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)
+    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 md5(filename, size):
+
+    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))
+
+    checksum = md5.hexdigest()
+    output("\rCalculating md5sum...\033[K", False)
+    success(checksum)
+
+    return checksum
 
 # vim: set sta sts=4 shiftwidth=4 sw=4 et ai :