I understand the issue in MNG-5265 as it relates to Maven repos but don't see 
how it relates to <scm>. Foreign <scm> sections don't just pop into your POM by 
accident. <scm> sections cannot be inherited from dependency resolution as is 
the case with Maven repos. Have I misunderstood ?

Peter 

    On Thursday, June 9, 2016 12:11 AM, Robert Scholte <[email protected]> 
wrote:
 
 

 Hi Peter,

there are several issues related to this, just filter in JIRA on the  
component Settings[1]
One of the issues I like is MNG-5265[1] which explains that id is not  
secure enough, a simple typo might lead to leaking your credentials to the  
wrong party.
So the solution is probably not in the pom.xml; I expect it to be in the  
settings.xml

thanks,
Robert

[1]  
https://issues.apache.org/jira/browse/MNG-5265?jql=project%20%3D%20MNG%20AND%20component%20%3D%20Settings%20AND%20status%20%3D%20Open%20ORDER%20BY%20priority%20DESC
[2] https://issues.apache.org/jira/browse/MNG-5265


On Thu, 09 Jun 2016 00:01:54 +0200, Peter Hansson  
<[email protected]> wrote:

>
> Hello
> I've been looking at improving the way certain plugins (scm, release,  
> etc) lookup credentials from a <server> in settings.xml in order to find  
> the credentials to use for a given endpoint.
> The current method - largely undocumented - is that the hostname from  
> endpoint's URL must match the server id from settings.xml. There's  
> optional support for port number as well in the case where e.g. multiple  
> SCMs are running the on same endpoint. The actual code to do the  
> matching between the server-id and the URL is scattered - and worse -  
> replicated in several projects. For example it exists in the scm plugin  
> but also in the release plugin.
> There are a number of use case that are currently unsupported:
> 1. Running several *different* flavours of SCMs on the same host. Say  
> you have a host called "repohost" which is both an SVN and a Git host.  
> Ok, not very likely, but alas not something possible today.
> 2. Using different credentials *within* the same SCM endpoint. Now this  
> is much worse. Just think of sites like GitHub and Bitbucket. It is  
> certainly not uncommon for the same developer to have several identities  
> on those sites.
>
> There are probably more cases out there that won't work today.
> I was about to contribute some code that could fix the problem by  
> allowing to match to a server-id on many more elements of the URL than  
> just hostname and port but would require changes to all SCM providers as  
> they would have to implement at least one new method.
>
> However, it now dawns on me that by far the best solution would be to  
> allow a new optional element in the <scm> section of the POM, namely  
> <serverId>. If present this will then be used to match a server-id from  
> settings.xml. If not present the existing matching method (based on  
> hostname and optionally the port) would prevail. This would be a much  
> cleaner approach than allowing to match on elements of the URL ... and  
> also a lot easier to explain to the Maven user. I can see from source  
> code comments that certainly this thought has existed in the mind of  
> some developer years ago but for some reason never carried out.
> Any comments on this?  Would you support the idea of a new optional  
> element, <serverId>, within the <scm> section ?
>
> Cheers
> Peter

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