Add the media source in the background title

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

diff --git a/image_creator/util.py b/image_creator/util.py
index 588d2b0..bd34222 100644 (file)
--- a/image_creator/util.py
+++ b/image_creator/util.py
@@ -33,9 +33,11 @@
 
 import sys
 import pbs
-from clint.textui import colored, progress as uiprogress
+import hashlib
 
-silent = False
+
+class FatalError(Exception):
+    pass
 
 
 def get_command(command):
@@ -52,46 +54,30 @@ def get_command(command):
         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 :