def _restoreItem(item, cwd, as_):
"""
Restores the provided item to the current working directory. If the 'as'
is not provided, the original file name is preserved.
"""
if as_:
restoreAs = os.path.join(cwd, as_)
else:
restoreAs = os.path.join(cwd, os.path.basename(item))
if os.path.exists(restoreAs):
if _confirmOverwrite(restoreAs):
fn.copy(item, restoreAs)
else:
fn.copy(item, restoreAs)
def backupFile(backupRoot, previousBackup, file_, altRoot, writer):
"""
Backup a file to according to the files state. If it's new or modified,
it's copied otherwise a hard link is created pointing to the file found
in the previous backup.
"""
previousFileName = previousBackup + fn.removeAltRoot(altRoot, file_)
backupFileName = backupRoot + fn.removeAltRoot(altRoot, file_)
if isFileModifiedOrNew(previousFileName, file_):
writer("Copying: {0}".format(file_))
fn.copy(file_, backupFileName)
else:
writer("Linking: {0}".format(file_))
os.link(previousFileName, backupFileName)
