diff options
Diffstat (limited to 'util/cpt_upgrader.py')
| -rwxr-xr-x | util/cpt_upgrader.py | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/util/cpt_upgrader.py b/util/cpt_upgrader.py index b4e4beab2..59a468989 100755 --- a/util/cpt_upgrader.py +++ b/util/cpt_upgrader.py @@ -64,6 +64,14 @@ # its upgrader (or downgrader) can run. It is still the case that a tag # can only be used once. +# Dependencies between tags are expressed by two variables at the top-level +# of the upgrader script: "depends" can be either a string naming another +# tag that it depends upon or a list of such strings; and "fwd_depends" +# accepts the same datatypes but it reverses the sense of the dependency +# arrow(s) -- it expresses that that tag depends upon the tag of the current +# upgrader. This can be especially valuable when maintaining private +# upgraders in private branches. + import ConfigParser import glob, types, sys, os @@ -94,6 +102,20 @@ class Upgrader: elif isinstance(self.depends, str): self.depends = [self.depends] + if not isinstance(self.depends, list): + print "Error: 'depends' for %s is the wrong type" % self.tag + sys.exit(1) + + if hasattr(self, 'fwd_depends'): + if isinstance(self.fwd_depends, str): + self.fwd_depends = [self.fwd_depends] + else: + self.fwd_depends = [] + + if not isinstance(self.fwd_depends, list): + print "Error: 'fwd_depends' for %s is the wrong type" % self.tag + sys.exit(1) + if hasattr(self, 'upgrader'): if not isinstance(self.upgrader, types.FunctionType): print "Error: 'upgrader' for %s is %s, not function" \ @@ -148,6 +170,20 @@ class Upgrader: Upgrader.legacy[i].depends = [Upgrader.legacy[i-1].tag] i = i + 1 + # resolve forward dependencies and audit normal dependencies + for tag, upg in Upgrader.by_tag.items(): + for fd in upg.fwd_depends: + if fd not in Upgrader.by_tag: + print "Error: '%s' cannot (forward) depend on "\ + "nonexistent tag '%s'" % (fd, tag) + sys.exit(1) + Upgrader.by_tag[fd].depends.append(tag) + for dep in upg.depends: + if dep not in Upgrader.by_tag: + print "Error: '%s' cannot depend on "\ + "nonexistent tag '%s'" % (tag, dep) + sys.exit(1) + def process_file(path, **kwargs): if not osp.isfile(path): import errno |