Create README.md

README.md

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+# LCA (Bug Localization)
+This is the data for **Bug Localization** benchmark as part of LCA.
+
+## How-to
+
+1. Since the dataset is private, if you haven't used HF Hub before, add your token via `huggingface-cli` first:
+
+    ```
+    huggingface-cli login
+    ```
+
+2. List all the available configs via [`datasets.get_dataset_config_names`](https://huggingface.co/docs/datasets/v2.14.3/en/package_reference/loading_methods#datasets.get_dataset_config_names) and choose an appropriate one
+   
+
+3. Load the data via [`load_dataset`](https://huggingface.co/docs/datasets/v2.14.3/en/package_reference/loading_methods#datasets.load_dataset):
+
+    ```
+    from datasets import load_dataset
+
+    configuration = "TODO"  # select a configuration
+    dataset = load_dataset("JetBrains-Research/lca-bug-localization", configuration, split="test")
+    ```
+
+    Some notes:
+      * All the data we have is considered to be in test split
+
+## Dataset Structure
+
+TODO: some overall structure or repo
+
+### Bug localization data
+
+This section concerns configuration with *full data* about each commit (no `-labels` suffix).
+
+Each example has the following fields:
+
+|     **Field**      |             **Description**              |
+|:------------------:|:----------------------------------------:|
+|    `repo_owner`    |            Bug issue repository owner.            |
+|    `repo_name`    |            Bug issue repository name.            |
+|     `issue_url`      |       GitHub link to issue <br> `https://github.com/{repo_owner}/{repo_name}/issues/{issue_id}`.       |
+|     `pull_url`      |       GitHub link to pull request <br> `https://github.com/{repo_owner}/{repo_name}/pull/{pull_id}`.       |
+|     `comment_url`      |       GitHub link to comment with pull request to issue reference <br> `https://github.com/{repo_owner}/{repo_name}/pull/{pull_id}#issuecomment-{comment_id}`.       |
+|     `issue_title`       | Issue title.  |
+|     `issue_body`       | Issue body.  |
+|     `base_sha`       | Pull request base sha.  |
+|     `head_sha`        | Pull request head sha.  |
+|     `diff_url`        | Pull request diff url between base and head sha <br> `https://github.com/{repo_owner}/{repo_name}/compare/{base_sha}...{head_sha}`.  |
+|     `diff`       | Pull request diff content.  |
+|     `changed_files`       | List of changed files parsed from diff.  |
+|     `changed_files_exts`       | Dict from changed files extension to count.  |
+|     `java_changed_files_count`       | Number of changed `.java` files.  |
+|     `kt_changed_files_count`       | Number of changed `.kt` files.  |
+|     `py_changed_files_count`       | Number of changed `.py` files.  |
+|     `code_changed_files_count`       | Number of changed `.java`, `.kt` or `.py` files. |
+|     `pull_create_at`       | Data of pull request creation in format yyyy-mm-ddThh:mm:ssZ.  |
+|     `stars`       | Number of repo stars.  |
+
+### Repos data
+
+TODO: describe repos data as `.tar.gz` archives with list of repos metadata