def CheckForUpdates(root = None):
"""
Check for an updated manifest.
Very simple, uses the configuration module.
Returns the new manifest if there is an update,
and None otherwise.
"""
conf = Configuration.Configuration()
cur = Configuration.SystemManifest(root)
m = conf.FindNewerManifest(cur.Sequence())
if verbose > 1 or debug > 0:
print >> sys.stderr, "Current sequence = %d, available sequence = %d" % (cur.Sequence(), m.Sequence() if m is not None else 0)
return m
def Install(root = None, manifest = None):
"""
Perform an install. Uses the system manifest, and installs
into root. root must be set.
"""
if root is None:
print >> sys.stderr, "Install must have target root specified"
usage()
conf = Configuration.Configuration()
if manifest is not None:
cur = Manifest.Manifest()
try:
cur.LoadPath(manifest)
except Exception as e:
print >> sys.stderr, "Could not load manifest from %s: %s" % (manifest, str(e))
return False
else:
try:
cur = Configuration.SystemManifest()
except:
print >> sys.stderr, "Cannot get system manifest"
return False
if cur is None or cur.Packages() is None:
raise Exception("Cannot load configuration")
print "Want to install into %s" % root
#
# To install, we have to grab each package in the manifest,
# and install them into the specified root directory.
# When we are done, we write out the system manifest into
# the manifest directory.
for pkg in cur.Packages():
print "Package %s" % pkg.Name()
filename = Manifest.FormatName(pkg.Name(), pkg.Version())
f = conf.FindPackage(filename, pkg.Checksum())
if f is None:
print >> sys.stderr, "\tCould not find package file for %s" % filename
return False
else:
if Installer.install_file(f, root) == False:
print >> sys.stderr, "Could not install package %s" % filename
return False
else:
print "%s installed" % pkg.Name()
conf.StoreManifest(cur, root)
return True
