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CommitBART: A Large Pre-trained Model for GitHub Commits

2022-08-17 06:35:57
Shangqing Liu, Yanzhou Li, Yang Liu

Abstract

GitHub commits, which record the code changes with natural language messages for description, play a critical role for software developers to comprehend the software evolution. To promote the development of the open-source software community, we collect a commit benchmark including over 7.99 million commits across 7 programming languages. Based on this benchmark, we present CommitBART, a large pre-trained encoder-decoder Transformer model for GitHub commits. The model is pre-trained by three categories (i.e., denoising objectives, cross-modal generation and contrastive learning) for six pre-training tasks to learn commit fragment representations. Furthermore, we unify a "commit intelligence" framework with one understanding task and three generation tasks for commits. The comprehensive experiments on these tasks demonstrate that CommitBART significantly outperforms previous pre-trained works for code. Further analysis also reveals each pre-training task enhances the model performance. We encourage the follow-up researchers to contribute more commit-related downstream tasks to our framework in the future.

Abstract (translated)

URL

https://arxiv.org/abs/2208.08100

PDF

https://arxiv.org/pdf/2208.08100.pdf


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