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Prelude:
This is my first step into building an open‑source style CLI tool in Go.
Release 0.1
Project Description
For this assignment, I built a “Repository Context Packager” tool named repo2context, which can scan a local git repository and generate a single, well-structured text file with repository information optimized for sending to LLMs such as ChatGPT and Gemini.
Technology Choice
- Language: Go (Golang)
- Output format: Markdown
- Why Go?: Although many people are talking about Go’s advantages all the time, my main reason to do this was simply that I wanted to challenge myself.
Implemented Features
Required Features
- Basic CLI interface with
--help
and--version
- Repository/file analysis
- Path tree structure
- Git commit/branch metadata
- Summary statistics (file count, lines of code)
- Standard streams (stdout for output, stderr for errors)
- Error handling
Optional Features Implemented
- Gitignore Integration
- The tool automatically excludes files and directories listed in
.gitignore
. - Provide a
--no-gitignore
to disable.gitignore
filtering
- Output to File (
-o
/--output
) - Users can save the formatted repository context into a file (markdown text).
- Example:
Development Experience
Process
- Set up GitHub repository
- Implement CLI argument parsing in Go (with
cobra
package)
- Add recursive directory/file reading; Implement project structure tree displaying; tests…
- Extract Git info (
os/exec
to run git commands and parse metadata)
- Get data together and format output
- Implement the two optional features: .gitignore handling + output to file
- Also invite classmates to file issues
Challenges
- Git env: Needed to handle different situations like Git may not be available or the repo may not be initialized. (To be honest, I found this type of check should be applied to basically everywhere, and that’s a bit painful handling errors in Go..)
- Starting from scratch: This was my first time writing a full CLI tool in Go, so I had to set up everything from zero — project structure, flags, Git integration, error handling, etc. (Have to do a lot of research)
Learnings
- Learned how to build a demo project from 0 to 0.1 in Go.
- Gained experience reading Git metadata and filtering files dynamically.
- Deepened understanding of how to do file system traversal, file I/O and error handling in Go.
Summary
- Implemented all required features
- Completed 2 optional features
- A not bad foundation for future extensions
- Good start for practicing open-source contribution process
Links
- GitHub Repository: https://github.com/BHChen24/repo2context/
- Author:Parker Chen
- URL:www.parkerchenca.com/article/272f0ccf-d7f8-8047-befa-f1688cd01bcf
- Copyright:All articles in this blog, except for special statements, adopt BY-NC-SA agreement. Please indicate the source!
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