160 commits

Author	SHA1	Message	Date
Paul Moore	a23e936bc7	Ensure candidate name is canonicalised	2020-03-18 14:54:15 +00:00
Paul Moore	f1b4be892a	Fix bug in get_dependencies() passing Requirement object rather than string	2020-03-18 14:53:04 +00:00
Paul Moore	1ebe1e0935	Integrate the new provider with --unstable-feature=resolver	2020-03-18 14:49:49 +00:00
Paul Moore	7d2eb544b5	Implement PipProvider	2020-03-18 14:42:16 +00:00
Tzu-ping Chung	dad77a9e4d	Better handle root vetices in graph ... ResolveLib *should* always produce a graph with only one root vertice, which is None. But we don't really need to rely on that implementation detail. Vertices without any parents can be assigned 0 in all cases.	2020-03-15 23:01:58 +08:00
Tzu-ping Chung	ffb3692e00	Add simple tests for get_installation_order() ... The implementation is improved a bit to make the sorting result more predictable for easier testing.	2020-03-15 23:01:57 +08:00
Tzu-ping Chung	53775279c4	Fix graph-walking terminal condition ... The weight mapping should have size `len(packages) + 1` because it needs to contain a "sentinel" node (None).	2020-03-15 22:25:26 +08:00
Tzu-ping Chung	a3f6c17d36	Implement resolver methods on provider interface ... This is using a temporary PipProvider class, which should be replaced by the actual implementation after it is merged.	2020-03-15 15:25:38 +08:00
Paul Moore	9b10b93503	Implement the resolvelib Requirement class	2020-03-11 11:37:56 +00:00
Tzu-ping Chung	fc810d7353	Add --unstable-feature=resolver ... This introduces a new general option --unstable-feature that can be used to opt into "preview" features in pip not enabled by default. Currently the only available feature is "resolver". A stub resolver interface (which would fail on invocation) is provided to respond to the flag. The --unstable-feature option is hidden from --help since the resolver does not yet work. This suppression should be removed when we release the resolver for general/public testing.	2020-03-11 18:51:01 +08:00