---
license: other
language: 
- code
- en
task_categories:
- text-generation
- summarization
tags:
- code
- commit_message_generation
pretty_name: CommitChronicle
size_categories:
- 1M<n<10M
dataset_info:
- config_name: default
  features:
  - name: author
    dtype: int64
  - name: date
    dtype: string
  - name: timezone
    dtype: int64
  - name: hash
    dtype: string
  - name: message
    dtype: string
  - name: mods
    list:
    - name: change_type
      dtype: string
    - name: old_path
      dtype: string
    - name: new_path
      dtype: string
    - name: diff
      dtype: string
  - name: language
    dtype: string
  - name: license
    dtype: string
  - name: repo
    dtype: string
  - name: original_message
    dtype: string
  splits:
  - name: test
    num_bytes: 5760117409
    num_examples: 1486267
  - name: train
    num_bytes: 30084265848
    num_examples: 7659458
  - name: validation
    num_bytes: 5905326070
    num_examples: 1554042
  download_size: 14168436205
  dataset_size: 41749709327
- config_name: subset_cmg
  features:
  - name: author
    dtype: int64
  - name: date
    dtype: string
  - name: timezone
    dtype: int64
  - name: hash
    dtype: string
  - name: message
    dtype: string
  - name: mods
    list:
    - name: change_type
      dtype: string
    - name: old_path
      dtype: string
    - name: new_path
      dtype: string
    - name: diff
      dtype: string
  - name: language
    dtype: string
  - name: license
    dtype: string
  - name: repo
    dtype: string
  - name: original_message
    dtype: string
  splits:
  - name: test
    num_bytes: 772774959
    num_examples: 204336
  download_size: 258151047
  dataset_size: 772774959
- config_name: subset_llm
  features:
  - name: author
    dtype: int64
  - name: date
    dtype: string
  - name: timezone
    dtype: int64
  - name: hash
    dtype: string
  - name: message
    dtype: string
  - name: mods
    list:
    - name: change_type
      dtype: string
    - name: old_path
      dtype: string
    - name: new_path
      dtype: string
    - name: diff
      dtype: string
  - name: language
    dtype: string
  - name: license
    dtype: string
  - name: repo
    dtype: string
  - name: original_message
    dtype: string
  splits:
  - name: test
    num_bytes: 15121048
    num_examples: 4025
  download_size: 5068039
  dataset_size: 15121048
configs:
- config_name: default
  data_files:
  - split: test
    path: data/test-*
  - split: train
    path: data/train-*
  - split: validation
    path: data/validation-*
- config_name: subset_cmg
  data_files:
  - split: test
    path: subset_cmg/test-*
- config_name: subset_llm
  data_files:
  - split: test
    path: subset_llm/test-*
---
# 📜 CommitChronicle 🔮

This is the dataset for commit message generation (and/or completion), introduced in the paper "From Commit Message Generation to History-Aware Commit Message Completion", ASE 2023.

Its key features:
* *large-scale and multilingual*: contains 10.7M commits from 11.9k GitHub repositories in 20 programming languages;
* *diverse*: avoids restrictive filtering on commit messages or commit diffs structure;
* *suitable for experiments with commit history*: provides metadata about commit authors and dates and uses split-by-project.

## Dataset Creation

> 🔍 For further details, please refer to:
> * **Paper**: TODO
> * **Repository**: [https://github.com/JetBrains-Research/commit_message_generation](https://github.com/JetBrains-Research/commit_message_generation)

We used [GitHub Search](https://seart-ghs.si.usi.ch/) tool and official GitHub API to select relevant repositories with permissive licenses (Apache, BSD 3-clause, MIT). 
On February 9th, 2023, we collected all commits made since 2017 from these repositories via [PyDriller](https://github.com/ishepard/pydriller). 
Next, we extensively cleaned the data, including filtering outliers, dropping commits from bot authors, and dropping duplicates. Note: to avoid disclosing personal information, we replaced the commit authors' names and emails with unique identifiers.

## Dataset Structure

### Data Instances 

Each data instance in the dataset is a commit. [A commit example](https://github.com/saridormi/commit_chronicle/commit/a7fb3b64184f0af5b08285cce14b9139baa94049) would look like the following:
```
{
  'repo': 'saridormi/commit_chronicle',
  'hash': 'a7fb3b64184f0af5b08285cce14b9139baa94049',
  'author': 123,
  'date': '05.07.2021 15:10:07',
  'timezone': 0,
  'license': 'MIT License',
  'language': 'Jupyter Notebook',
  'message': 'Add license badge to readme',
  'original_message': 'Add license badge to readme',
  'mods': [{'change_type': 'MODIFY',
            'new_path': 'README.md',
            'old_path': 'README.md'
            'diff': '@@ -1,6 +1,6 @@\n'
                    ' # Commits dataset\n'
                    ' \n'
                    '-> :heavy_exclamation_mark: **TODO:** license\n'
                    '+![GitHub](https://img.shields.io/github/license/saridormi/commits_dataset?style=for-the-badge)\n'}],
}
```

### Data Fields

Each example has the following fields:

|     **Field**      |             **Description**              |
|:------------------:|:----------------------------------------:|
|       `repo`       |            Commit repository.            |
|       `hash`       |               Commit hash.               |
|      `author`      |       Unique id for commit author        |
|       `date`       |        Commit date (from author).        |
|     `timezone`     |      Commit timezone (from author).      |
|     `license`      |       Commit repository's license.       |
|     `language`     |    Commit repository's main language.    |
|     `message`      |    Commit message (after processing).    |
| `original_message` | Commit message (without any processing). |
|       `mods`       | List of file modifications from commit.  |

Each file modification has the following fields:

|    **Field**     |                                          **Description**                                          |
|:-------------:|:-------------------------------------------------------------------------------------------------:|
| `change_type` | Type of change to current file. One of: `ADD`, `COPY`, `RENAME`, `DELETE`, `MODIFY` or `UNKNOWN`. |
|  `old_path`   |                           Path to file before change (might be empty).                            |
|  `new_path`   |                            Path to file after change (might be empty).                            |
|    `diff`     |                                   `git diff` for current file.                                    |

### Data Splits

We provide the following configurations:
* `default`
  * `train`: full training split (7.66M commits)
  * `validation`: full validation split (1.55M commits)
  * `test`: full test split (1.49M commits)
* `subset_cmg`
  * `test`: test subset used for experiments with CMG approaches (204k commits)
* `subset_llm`
  * `test`: test subset used for experiments with a LLM (4k commits)

## Considerations for Using the Data

> Adopted from [the Stack](https://huggingface.co/datasets/bigcode/the-stack).

The released dataset may contain sensitive information such as emails, IP addresses, and API/ssh keys that have previously been published to public repositories on GitHub. In the event that the dataset contains personal information, researchers should only use public, non-personal information in support of conducting and publishing their open-access research. 
Personal information should not be used for spamming purposes, including sending unsolicited emails or selling  of personal information.

The dataset is a collection of commits from repositories with various licenses. Any use of all or part of the code gathered in this dataset must abide by the terms of the original licenses, including attribution clauses when relevant. We facilitate this by providing provenance information for each data point.

## Citation

```
TODO
```