Carrillo16/google-code-archive

Google Code Archive Dataset

Dataset Description

This dataset was compiled from the Google Code Archive, a preserved snapshot of projects hosted on Google Code, Google's open-source project hosting service that operated from 2006 to 2016. Google Code was one of the major code hosting platforms of its era, hosting hundreds of thousands of open-source projects before its shutdown. The archive provides a unique historical record of open-source development during a formative period of modern software engineering.

Dataset Summary

Key Features

• —Historical open-source corpus: Contains code from over 488K repositories hosted on Google Code during 2006-2016
• —Diverse language coverage: Spans 454 programming languages identified by go-enry (based on GitHub Linguist rules)
• —Rich metadata: Includes repository name, file path, detected language, license information, and file size
• —Quality filtered: Extensive filtering to remove vendor code, build artifacts, generated files, and low-quality content
• —Era-specific patterns: Captures coding conventions and library usage from the pre-modern era of software development

Languages

The dataset includes 454 programming languages. The top 30 languages by file count:

Licenses

The dataset includes files from repositories with various licenses as specified in the Google Code Archive:

Dataset Structure

Data Fields

Data Format

• —Format: Apache Parquet with Zstd compression
• —File Structure: 71 files (google_code_0000.parquet to google_code_0070.parquet)

Data Splits

All examples are in the train split. There is no validation or test split.

Example Data Point

{
    'code': 'public class HundredIntegers {\n\tpublic static void main (String[] args) {\n\t\tfor (int i = 1; i<=100; i++) {\n\t\t\tSystem.out.println(i);\n\t\t}\n\t}\n}',
    'repo_name': '100integers',
    'path': 'HundredIntegers.java',
    'language': 'Java',
    'license': 'epl',
    'size': 147
}

Dataset Creation

Project Discovery

Most project IDs were sourced from the Archive Team Google Code Wiki. This list provided the basis for the crawling and extraction process.

Pipeline Overview

The dataset was created through a multi-stage pipeline:

1. 1.Project Discovery: Fetching project metadata from the Google Code Archive
2. 2.Source Filtering: Selecting projects that have source code available (hasSource: true)
3. 3.Archive Downloading: Downloading source archives from the Google Code Archive storage
4. 4.Content Extraction: Extracting and filtering source code files
5. 5.Parquet Generation: Writing filtered records to Parquet shards with Zstd compression

Language Detection

Programming languages are detected using go-enry, a Go port of GitHub's Linguist library. Only files classified as Programming or Markup language types are included (Data and Prose types are excluded).

License Detection

Licenses are obtained directly from the Google Code Archive project metadata. The archive preserves the original license selection made by project owners when creating their repositories on Google Code.

File Filtering

Extensive filtering is applied to ensure data quality:

Size Limits

Excluded Directories

• —Configuration: .git/, .github/, .gitlab/, .vscode/, .idea/, .vs/, .settings/, .eclipse/, .project/, .metadata/
• —Vendor/Dependencies: node_modules/, bower_components/, jspm_packages/, vendor/, third_party/, 3rdparty/, external/, packages/, deps/, lib/vendor/, target/dependency/, Pods/
• —Build Output: build/, dist/, out/, bin/, target/, release/, debug/, .next/, .nuxt/, _site/, _build/, __pycache__/, .pytest_cache/, cmake-build-*, .gradle/, .maven/

Excluded Files

• —Lock Files: package-lock.json, yarn.lock, pnpm-lock.yaml, Gemfile.lock, Cargo.lock, poetry.lock, Pipfile.lock, composer.lock, go.sum, mix.lock
• —Minified Files: Any file containing .min. in the name
• —Binary Files: .exe, .dll, .so, .dylib, .a, .lib, .o, .obj, .jar, .war, .ear, .class, .pyc, .pyo, .wasm, .bin, .dat, .pdf, .doc, .docx, .xls, .xlsx, .ppt, .pptx, .zip, .tar, .gz, .bz2, .7z, .rar, .jpg, .jpeg, .png, .gif, .bmp, .ico, .svg, .mp3, .mp4, .avi, .mov, .wav, .flac, .ttf, .otf, .woff, .woff2, .eot
• —System Files: .DS_Store, thumbs.db

Content Filtering

• —UTF-8 Validation: Files must be valid UTF-8 encoded text
• —Binary Detection: Files detected as binary by go-enry are excluded
• —Generated Files: Files with generation markers in the first 500 bytes are excluded:
• —generated by, do not edit, auto-generated, autogenerated, @generated, <auto-generated
• —Empty Files: Files that are empty or contain only whitespace are excluded
• —Long Lines: Files with any line exceeding 1,000 characters are excluded
• —go-enry Filters: Additional filtering using go-enry's IsVendor(), IsImage(), IsDotFile(), IsTest(), and IsGenerated() functions
• —Documentation-only Repos: Repositories containing only documentation files (no actual code) are skipped

Source Data

All data originates from the Google Code Archive, which preserves projects hosted on Google Code before its shutdown in January 2016.

Considerations for Using the Data

Historical Context

This dataset represents code from 2006-2016 and may contain:

• —Outdated coding patterns and deprecated APIs
• —Legacy library dependencies that are no longer maintained
• —Security vulnerabilities that have since been discovered and patched
• —Code written for older language versions (Python 2, older Java versions, etc.)

Users should be aware that this code reflects historical practices and may not represent modern best practices.

Personal and Sensitive Information

The dataset may contain:

• —Email addresses in code comments or configuration files
• —API keys or credentials that were accidentally committed
• —Personal information in comments or documentation

Users should exercise caution and implement appropriate filtering when using this data.

Licensing Information

This dataset is a collection of source code 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. The license field in each data point indicates the license of the source repository.