cef/tools/file_util.py

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# Copyright (c) 2011 The Chromium Embedded Framework Authors. All rights
# reserved. Use of this source code is governed by a BSD-style license that
# can be found in the LICENSE file.
from glob import iglob
import os
import shutil
import sys
import time
def read_file(name, normalize = True):
""" Read a file. """
try:
f = open(name, 'r')
# read the data
data = f.read()
if normalize:
# normalize line endings
data = data.replace("\r\n", "\n")
return data
except IOError, (errno, strerror):
sys.stderr.write('Failed to read file '+name+': '+strerror)
raise
else:
f.close()
def write_file(name, data):
""" Write a file. """
try:
f = open(name, 'w')
# write the data
f.write(data)
except IOError, (errno, strerror):
sys.stderr.write('Failed to write file '+name+': '+strerror)
raise
else:
f.close()
def path_exists(name):
""" Returns true if the path currently exists. """
return os.path.exists(name)
def backup_file(name):
""" Rename the file to a name that includes the current time stamp. """
move_file(name, name+'.'+time.strftime('%Y-%m-%d-%H-%M-%S'))
def copy_file(src, dst, quiet = True):
""" Copy a file. """
try:
shutil.copy(src, dst)
if not quiet:
sys.stdout.write('Transferring '+src+' file.\n')
except IOError, (errno, strerror):
sys.stderr.write('Failed to copy file from '+src+' to '+dst+': '+strerror)
raise
def move_file(src, dst, quiet = True):
""" Move a file. """
try:
shutil.move(src, dst)
if not quiet:
sys.stdout.write('Moving '+src+' file.\n')
except IOError, (errno, strerror):
sys.stderr.write('Failed to move file from '+src+' to '+dst+': '+strerror)
raise
def copy_files(src_glob, dst_folder, quiet = True):
""" Copy multiple files. """
for fname in iglob(src_glob):
dst = os.path.join(dst_folder, os.path.basename(fname))
if os.path.isdir(fname):
copy_dir(fname, dst, quiet)
else:
copy_file(fname, dst, quiet)
def remove_file(name, quiet = True):
""" Remove the specified file. """
try:
if path_exists(name):
os.remove(name)
if not quiet:
sys.stdout.write('Removing '+name+' file.\n')
except IOError, (errno, strerror):
sys.stderr.write('Failed to remove file '+name+': '+strerror)
raise
def copy_dir(src, dst, quiet = True):
""" Copy a directory tree. """
try:
remove_dir(dst, quiet)
shutil.copytree(src, dst)
if not quiet:
sys.stdout.write('Transferring '+src+' directory.\n')
except IOError, (errno, strerror):
sys.stderr.write('Failed to copy directory from '+src+' to '+dst+': '+strerror)
raise
def remove_dir(name, quiet = True):
""" Remove the specified directory. """
try:
if path_exists(name):
shutil.rmtree(name)
if not quiet:
sys.stdout.write('Removing '+name+' directory.\n')
except IOError, (errno, strerror):
sys.stderr.write('Failed to remove directory '+name+': '+strerror)
raise
def make_dir(name, quiet = True):
""" Create the specified directory. """
try:
if not path_exists(name):
if not quiet:
sys.stdout.write('Creating '+name+' directory.\n')
os.makedirs(name)
except IOError, (errno, strerror):
sys.stderr.write('Failed to create directory '+name+': '+strerror)
raise
def get_files(search_glob):
""" Returns all files matching the search glob. """
# Sort the result for consistency across platforms.
return sorted(iglob(search_glob))
def read_version_file(file, args):
""" Read and parse a version file (key=value pairs, one per line). """
lines = read_file(file).split("\n")
for line in lines:
parts = line.split('=', 1)
if len(parts) == 2:
args[parts[0]] = parts[1]
def eval_file(src):
""" Loads and evaluates the contents of the specified file. """
return eval(read_file(src), {'__builtins__': None}, None)
def normalize_path(path):
""" Normalizes the path separator to match the Unix standard. """
if sys.platform == 'win32':
return path.replace('\\', '/')
return path