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)
def test_removeAltRoot_withAlt(self):
testFile = "/mnt/foo/bar"
newRoot = fn.removeAltRoot("/mnt", testFile)
self.assertEqual(
newRoot,
"/foo/bar",
"Invalid alt root returned: {0}".format(newRoot))
def test_removeAltRoot_noAlt(self):
testFile = "/mnt/foo/bar"
newRoot = fn.removeAltRoot("/", testFile)
self.assertEqual(
newRoot,
testFile,
"Original root was modified: {0}".format(newRoot))
def backupDirectory(backupRoot, previousBackup, directory, settings, writer):
"""
Primary function to perform a system backup.
"""
if directory in settings.ignoredDirectories:
writer("Ignore: {0}".format(directory))
return
altRootDir = fn.removeAltRoot(settings.root, directory)
destination = backupRoot + altRootDir
createDestination(directory, destination)
for item in (join(directory, f) for f in os.listdir(directory)):
if os.path.islink(item):
backupLink(backupRoot, item, settings.root)
elif os.path.isdir(item):
backupDirectory(backupRoot, previousBackup, item, settings, writer)
elif os.path.isfile(item):
if skipFile(item, settings.ignoredFiles, settings.maxFileSize):
writer("Ignore: {0}".format(item))
else:
backupFile(
backupRoot, previousBackup, item, settings.root, writer)
os.utime(
destination,
(os.path.getatime(directory), os.path.getmtime(directory)))
def backupLink(backupRoot, symbolicLink, altRoot):
"""
Backup a symbolic link.
"""
realValue = os.readlink(symbolicLink)
newLinkDest = backupRoot + fn.removeAltRoot(altRoot, symbolicLink)
os.symlink(realValue, newLinkDest)
def listFiles(args, settings):
"""
Main function for the list option.
"""
wordArgs = fn.parseWordArgs(args)
home = fn.getBackupHome(settings.backupLocation, settings.hostName)
backups = fn.getBackupsForArgs(wordArgs, fn.getBackups(home))
backupWd = fn.removeAltRoot(settings.root, os.getcwd())
for id_ in backups.keys():
items = fn.expandGlob(home, backups[id_], backupWd, wordArgs["glob"])
for item in items:
_outputItemInfo(id_, fn.getInfo(item))
def remove(args, settings):
"""
Main function for the remove option.
"""
wordArgs = fn.parseWordArgs(args)
_validateArgs(wordArgs)
home = fn.getBackupHome(settings.backupLocation, settings.hostName)
backups = fn.getBackupsForArgs(wordArgs, fn.getBackups(home))
backupWd = fn.removeAltRoot(settings.root, os.getcwd())
for id_ in backups.keys():
items = fn.expandGlob(home, backups[id_], backupWd, wordArgs["glob"])
for item in items:
_delete(item)
def restore(args, settings):
"""
Main function for the restore option.
"""
wordArgs = fn.parseWordArgs(args)
_validateArgs(wordArgs)
home = fn.getBackupHome(settings.backupLocation, settings.hostName)
fn.insureBackupHomeExists(home)
backup = fn.getBackupOrLatest(wordArgs, home)
cwd = os.getcwd()
backupWd = fn.removeAltRoot(settings.root, cwd)
items = fn.expandGlob(home, backup, backupWd, wordArgs["glob"])
_validateItems(items, wordArgs)
for item in items:
_restoreItem(item, cwd, wordArgs["as"])
def diff(args, settings):
"""
Main function for the diff option.
"""
wordArgs = fn.parseWordArgs(args)
_validateArgs(wordArgs)
home = fn.getBackupHome(settings.backupLocation, settings.hostName)
fn.insureBackupHomeExists(home)
backup = fn.getBackupOrLatest(wordArgs, home)
cwd = os.getcwd()
backupWd = fn.removeAltRoot(settings.root, cwd)
items = fn.expandGlob(home, backup, backupWd, wordArgs["glob"])
_validateItems(items)
localFile = _getLines(join(cwd, wordArgs["glob"]))
backupFile = _getLines(items[0])
diff = _getDiff()
sys.stdout.writelines(diff(backupFile, localFile))
def changes(args, settings):
"""
Main function for the changes option.
"""
wordArgs = fn.parseWordArgs(args)
_validateArgs(wordArgs)
home = fn.getBackupHome(settings.backupLocation, settings.hostName)
fn.insureBackupHomeExists(home)
backup = fn.getBackupOrLatest(wordArgs, home)
cwd = os.getcwd()
backupWd = fn.removeAltRoot(settings.root, cwd)
backedUpFiles = fn.expandGlob(home, backup, backupWd, "*")
backupDir = join(home, backup) + backupWd
allFiles = set(os.listdir(cwd)).union(map(basename, backedUpFiles))
for item in allFiles:
status = _getStatus(join(cwd, item), join(backupDir, item))
if status:
_outputItem(item, status)