def wait_for_file_mtime_change(filename):
"""This function is typically called before a file save operation,
waiting if necessary for the file modification time to change. The
purpose is to avoid successive file updates going undetected by the
caching mechanism that depends on a change in the file modification
time to know when the file should be reparsed."""
from trac.util import touch_file
try:
mtime = os.stat(filename).st_mtime
touch_file(filename)
while mtime == os.stat(filename).st_mtime:
time.sleep(1e-3)
touch_file(filename)
except OSError:
pass # file doesn't exist (yet)
def wait_for_file_mtime_change(filename):
"""This function is typically called before a file save operation,
waiting if necessary for the file modification time to change. The
purpose is to avoid successive file updates going undetected by the
caching mechanism that depends on a change in the file modification
time to know when the file should be reparsed."""
from trac.util import touch_file
try:
mtime = os.stat(filename).st_mtime
touch_file(filename)
while mtime == os.stat(filename).st_mtime:
time.sleep(1e-3)
touch_file(filename)
except OSError:
pass # file doesn't exist (yet)
def test_missing(self):
util.touch_file(self.filename)
self.assertTrue(os.path.isfile(self.filename))
self.assertEqual(0, os.path.getsize(self.filename))
def test_touch_file(self):
util.create_file(self.filename, self.data, 'wb')
util.touch_file(self.filename)
with open(self.filename, 'rb') as f:
self.assertEqual(self.data, f.read())
def test_missing(self):
util.touch_file(self.filename)
self.assertTrue(os.path.isfile(self.filename))
self.assertEqual(0, os.path.getsize(self.filename))
def test_touch_file(self):
util.create_file(self.filename, self.data, 'wb')
util.touch_file(self.filename)
with open(self.filename, 'rb') as f:
self.assertEqual(self.data, f.read())