mdw@git.distorted.org.uk Git - stgit/blob - stgit/utils.py

   1 """Common utility functions
   2 """
   3
   4 __copyright__ = """
   5 Copyright (C) 2005, Catalin Marinas <catalin.marinas@gmail.com>
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License version 2 as
   9 published by the Free Software Foundation.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19 """
  20
  21 def read_string(filename, multiline = False):
  22     """Reads the first line from a file
  23     """
  24     f = file(filename, 'r')
  25     if multiline:
  26         result = f.read()
  27     else:
  28         result = f.readline().strip()
  29     f.close()
  30     return result
  31
  32 def write_string(filename, line, multiline = False):
  33     """Writes 'line' to file and truncates it
  34     """
  35     f = file(filename, 'w+')
  36     if multiline:
  37         f.write(line)
  38     else:
  39         print >> f, line
  40     f.close()
  41
  42 def append_strings(filename, lines):
  43     """Appends 'lines' sequence to file
  44     """
  45     f = file(filename, 'a+')
  46     for line in lines:
  47         print >> f, line
  48     f.close()
  49
  50 def append_string(filename, line):
  51     """Appends 'line' to file
  52     """
  53     f = file(filename, 'a+')
  54     print >> f, line
  55     f.close()
  56
  57 def insert_string(filename, line):
  58     """Inserts 'line' at the beginning of the file
  59     """
  60     f = file(filename, 'r+')
  61     lines = f.readlines()
  62     f.seek(0); f.truncate()
  63     print >> f, line
  64     f.writelines(lines)
  65     f.close()
  66
  67 def create_empty_file(name):
  68     """Creates an empty file
  69     """
  70     file(name, 'w+').close()