# CommitDiffSourceCodeType
<a name="API_CommitDiffSourceCodeType"></a>

A type of [SourceCodeType](https://docs.aws.amazon.com/codeguru/latest/reviewer-api/API_SourceCodeType) that specifies the commit diff for a pull request on an associated repository. The `SourceCommit` and `DestinationCommit` fields are required to do a pull request code review.

## Contents
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 ** DestinationCommit **   <a name="reviewer-Type-CommitDiffSourceCodeType-DestinationCommit"></a>
The SHA of the destination commit used to generate a commit diff. This field is required for a pull request code review.  
Type: String  
Length Constraints: Minimum length of 6. Maximum length of 64.  
Pattern: `\S+`   
Required: Yes

 ** SourceCommit **   <a name="reviewer-Type-CommitDiffSourceCodeType-SourceCommit"></a>
The SHA of the source commit used to generate a commit diff. This field is required for a pull request code review.  
Type: String  
Length Constraints: Minimum length of 6. Maximum length of 64.  
Pattern: `\S+`   
Required: Yes

 ** MergeBaseCommit **   <a name="reviewer-Type-CommitDiffSourceCodeType-MergeBaseCommit"></a>
The SHA of the merge base of a commit.  
Type: String  
Length Constraints: Minimum length of 6. Maximum length of 64.  
Pattern: `\S+`   
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/codeguru-reviewer-2019-09-19/CommitDiffSourceCodeType) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/codeguru-reviewer-2019-09-19/CommitDiffSourceCodeType) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/codeguru-reviewer-2019-09-19/CommitDiffSourceCodeType)