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https://issues.apache.org/jira/browse/SCM-839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15766754#comment-15766754
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Jacek Gebal commented on SCM-839:
---------------------------------

What I've figured so far, is that the command `git diff --cache ` accepts only 
one branch/version paramete. The plugin however is passing both start and end 
version to that command.
This makes the command fail.

> scm:diff with GIT doesn't work
> ------------------------------
>
>                 Key: SCM-839
>                 URL: https://issues.apache.org/jira/browse/SCM-839
>             Project: Maven SCM
>          Issue Type: Bug
>          Components: maven-scm-provider-gitexe
>    Affects Versions: 1.9.5
>         Environment: Apache Maven 3.3.9 
> (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T16:41:47+00:00)
> Maven home: C:\Users\a565281\apache-maven-3.3.9\bin\..
> Java version: 1.8.0_92, vendor: Oracle Corporation
> Java home: C:\Program Files\Java\jdk1.8.0_92\jre
> Default locale: en_US, platform encoding: Cp1252
> OS name: "windows 7", version: "6.1", arch: "amd64", family: "dos"
>            Reporter: Jacek Gebal
>
> When executing the maven command as below, I get an exception.
> mvn scm:diff -DstartScmVersion=master -DstartScmVersionType=branch 
> -DendScmVersion=HEAD -DendScmVersionType=branch
> Also the examples in documentation for mvn:diff do not seem to be OK:
> https://maven.apache.org/components/scm/maven-scm-plugin/examples/scm-advance-features.html



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