[
https://issues.apache.org/jira/browse/MRESOLVER-240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17495391#comment-17495391
]
wei cai commented on MRESOLVER-240:
-----------------------------------
[https://github.com/apache/maven-resolver/pull/144] is for this JIRA.
> Using breadth-first approach to resolve maven dependencies
> ----------------------------------------------------------
>
> Key: MRESOLVER-240
> URL: https://issues.apache.org/jira/browse/MRESOLVER-240
> Project: Maven Resolver
> Issue Type: Improvement
> Components: Resolver
> Affects Versions: 1.7.3
> Reporter: wei cai
> Priority: Major
>
> There was discussions about the DFS or BFS algorithm for maven resolver in
> MRESOLVER-228, Changing to BFS would make MRESOLVER-228 & MRESOLVER-7 much
> easier to implement. Here is the plan for multiple changes requested recently:
> * DFS > BFS - preparation for parallel download
> * Skip & Reconcile - avoid unnecessary version resolution (MRESOLVER-228)
> * Download descriptors in parallel (MRESOLVER-7)
> This Jira would focus on DFS -> BFS.
> Basically maven would:
> * Go through all nodes and their dependencies starting from the root node to
> form a dependency graph.
> * Resolve the version conflicts by a nearest first approach (close to BFS)
> and determine the effective dependencies.
> Changing DFS to BFS is just a sequence change (depth first -> width first),
> all nodes and their dependencies are still traversed, thus it won't change
> the dependency resolve result.
> When changing to BFS, we cannot break below rules:
> * Exclusions and dependency management can be inherited from parent node.
> [PR|https://github.com/apache/maven-resolver/pull/144] (co-authored by
> @ibabiankou) is fired. The basic idea of this PR is:
> * Use queue instead of stack as required by BFS algorithm.
> * Track the objects such as DependencySelector, DependencyManager in
> DependencyProcessingContext and put into the queue, so inheritance of
> Exclusions and dependency management won't break.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
