X-Git-Url: https://code.grnet.gr/git/ganeti-local/blobdiff_plain/ecabe27efd4413ef4c011529e19505133d2d2ffa..415feb2ee0a760e48a21a50488f6072f8afa9cff:/lib/utils/text.py

diff --git a/lib/utils/text.py b/lib/utils/text.py
index f369c74..0a0e68c 100644
--- a/lib/utils/text.py
+++ b/lib/utils/text.py
@@ -43,6 +43,9 @@ _MAC_CHECK_RE = re.compile("^([0-9a-f]{2}:){5}[0-9a-f]{2}$", re.I)
 #: Shell param checker regexp
 _SHELLPARAM_REGEX = re.compile(r"^[-a-zA-Z0-9._+/:%@]+$")
 
+#: ASCII equivalent of unicode character 'HORIZONTAL ELLIPSIS' (U+2026)
+_ASCII_ELLIPSIS = "..."
+
 
 def MatchNameComponent(key, name_list, case_sensitive=True):
   """Try to match a name against a list.
@@ -268,12 +271,16 @@ class ShellWriter:
     """
     assert self._indent >= 0
 
-    self._fh.write(self._indent * self.INDENT_STR)
-
     if args:
-      self._fh.write(txt % args)
+      line = txt % args
     else:
-      self._fh.write(txt)
+      line = txt
+
+    if line:
+      # Indent only if there's something on the line
+      self._fh.write(self._indent * self.INDENT_STR)
+
+    self._fh.write(line)
 
     self._fh.write("\n")
 
@@ -552,3 +559,26 @@ def FormatOrdinal(value):
     suffix = "th"
 
   return "%s%s" % (value, suffix)
+
+
+def Truncate(text, length):
+  """Truncate string and add ellipsis if needed.
+
+  @type text: string
+  @param text: Text
+  @type length: integer
+  @param length: Desired length
+  @rtype: string
+  @return: Truncated text
+
+  """
+  assert length > len(_ASCII_ELLIPSIS)
+
+  # Serialize if necessary
+  if not isinstance(text, basestring):
+    text = str(text)
+
+  if len(text) <= length:
+    return text
+  else:
+    return text[:length - len(_ASCII_ELLIPSIS)] + _ASCII_ELLIPSIS