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From "Brent N Atkinson (JIRA)" <>
Subject [jira] [Reopened] (CONTINUUM-2726) Does not appear to be possible to use Git as an SCM
Date Fri, 17 Apr 2015 13:24:59 GMT


Brent N Atkinson reopened CONTINUUM-2726:
      Assignee: Brent N Atkinson

Re-opening since I can now reproduce this behavior. The reason I was unable to before is that
it depends on the state of the file system at the time of the import. The issue is not with
using git as an scm. It stems from the method continuum uses to import POMs over HTTP and
the URL patterns necessary to access POMs from the ASF git repositories. This also explains
why it was possible to use file upload successfully.

The quick version of what is happening: 

  * To support multi-module import over HTTP without an scm checkout, a crawl is attempted
to replicate the project directory structure locally (complete with POMs)
  * The URL pattern is used to construct a root path to replicate project structure under
  * The replication root is shared between separate imports
  * Overlapping paths can conflict causing replication to fail

Specifically, using the Commons Math URL as an example:

Replication will happen under $REPLICATION_ROOT/repos and the root pom file will be named
asf. While this naming would not work with Maven by default, the import simply needs a valid
file. Import will be successful as long as a file can be created. This is why I could successfully
import the project locally: I had a clean replication root.

However, if you import a project from an ASF subversion repository first, such as Maven 3:


Replication happens under $REPLICATION_ROOT/repos/asf/maven/maven-3/trunk/ and the root pom
file will be named pom.xml and will succeed. However, due to the fact that the replication
root is reused, commons-math's POM (repos/asf) will conflict with Maven 3's directory structure
(repos/asf is a directory) and creation of the Commons Math's POM subsequently fails.

> Does not appear to be possible to use Git as an SCM
> ---------------------------------------------------
>                 Key: CONTINUUM-2726
>                 URL:
>             Project: Continuum
>          Issue Type: Bug
>            Reporter: Sebb
>            Assignee: Brent N Atkinson
>            Priority: Critical
>         Attachments: commons-math-successful.png, commons-math-tls-failure-message.png
> Commons MATH now uses Git.
> Does not appear to be possible to use Continuum to build it.
> Tried the following URLs:
> => Unknown error trying to build POM.
> => POM file does not exist. Either the POM you specified or one of its modules does
not exist.
> What is the correct incantation for Git projects?
> If this is documented anywhere I could not find it.

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