Resolved Ivy Properties written to cache during ivy:resolve incorrectly
represents transitive evictions
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Key: IVY-1159
URL: https://issues.apache.org/jira/browse/IVY-1159
Project: Ivy
Issue Type: Bug
Components: Core
Affects Versions: trunk
Reporter: Ed Burcher
In ResolveEngine.resolve the code that writes the properties file appears to be
incorrect.
When the dependencies collection includes two or more entries for the same
dependency (one from the root ivy file and the others being transitives), the
properties file will always only ever be populated with the information from
the IvyNode that belongs to the root ivy file (effectively the comment states
this, so it certainly appears intentional).
This produces the following bugs / undesirable effects:
* incorrect delivered descriptor in some situations (where a dependency is
both directly and transitively imported)
* order of declaration of dependencies alters behaviour
These are pretty major problems because (as demonstrated below) a
delivered/published ivy descriptor can identify completely bogus revisions for
the dynamic->static replacements, which are not to the actual revisions used
when compiling etc
Set up
module *one* has no dependencies and has been published (as rev = 1, say)
module *two* has a dependency on module one (only) and has been published (as
rev = 1, also)
module *three* has dependencies on both modules one and two and *lists them in
the order two,one*
In the module three descriptor the revisions mentioned for two and one do not
actually exist (two=2 & one=2 say - repository only contains rev=1 of both)
Ivy settings (attached) has a resolver that refers to a local repo, and has
force=true and local=true set.
Problem Case - use case: publishing module 3
1) ivy:resolve on module three, using refresh=true, transitive=true. Otherwise
nothing special here.
then
2) ivy:deliver (status=reelase, pubdate=now, deliverpattern supplied,
pubrevision supplied (rev=1))
3) (lastly, the ivy:publish step woud happen here, but is not relevant to the
problem)
Expected outcome:
Because the primary resolver has force=true, rev 1 of both module dependencies
of 'three' should be selected [Because rev=1 publications are the only ones
present in the repository] when resolving three's declared deps (both of which
declare a dep on rev=2).
Actual outcome:
Delivered descriptor correctly names two as being resolved to rev=1.
Incorrectly names module one as being resolved to rev=2 (which doesn't exist -
and never has!)
Workaround:
Reverse the order of the declared dependencies in three's ivy descriptor (i.e
new order is one, two) - problem does not occur.
Diagnosis:
Logs for resolve appear to show everything is fine (the eviction is noted, the
generated report xml shows the declared direct dependency (one, rev=2) being
evicted by the transitive dependency (one, rev=1 as declared in two's published
ivy descriptor)
However, debugging DeliverEngine.java and ResolveEngine.java - it is apparent
that the 'resolved ivy properties file' is used to drive the replacement of
dynamic revisions with static ones during deliver. In the error case, the
properties file shows this:
+revision\:\...@\#\:+2\:\...@\#\:+module\:\...@\#\:+one\: <snip> :=2 ?
+revision\:\...@\#\:+2\:\...@\#\:+module\:\...@\#\:+two\: <snip> :=1 release
The '?' is put there because the IvyNode that represented the direct dependency
has no descriptor (correctly, because it has been evicted). Because the real
selected revision is not put into the properties file, the ivy:deliver task is
doomed to produce wrong results.
The correct behaviour in this case would be for the EvictionInfo stored against
the evicted IvyNode to be inspected to find the appropriate revision
information. I have attached a pretty ugly example of how this could be
achieved.
Just before the comment ("The evicted modules have no description, so we can't
put their status")
{code}
if (depDescriptor == null) {
EvictionData ed = null;
for (int j=0; j<confs.length && ed == null; j++) {
ed = dependencies[i].getEvictedData(confs[j]);
}
if (ed != null) {
Collection selected = ed.getSelected();
if (selected != null) {
if (selected.size() == 1) {
IvyNode sel =
(IvyNode)selected.iterator().next();
depDescriptor = sel.getDescriptor();
depResolvedId = sel.getResolvedId();
if (depResolvedId == null) {
throw new
NullPointerException("getResolvedId() is null for (transitive) "
+ dependencies[i].toString());
}
rev = depResolvedId.getRevision();
}
else if (selected.size() > 1) {
throw new RuntimeException("Unexpectedly
large number of selecteds within eviction collection");
}
}
}
}
{code}
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