A fast developer productivity CLI built in Rust. Generates changelogs from git history, analyzes log files for error patterns, and reports project statistics with language breakdowns.
Most developer tools are written in JavaScript or Python. This CLI is built in Rust for speed: it processes log files at 500K+ lines/second and scans entire project trees in milliseconds. It also demonstrates systems programming skills that complement a web-focused portfolio.
Generates structured changelogs from git commit history. Parses conventional commit format (feat:, fix:, chore:, etc.), groups by type, and outputs as colored terminal text or JSON.
Analyzes log files for patterns. Counts log levels, identifies the most frequent error messages, and reports parse speed. Supports level filtering and JSON output.
Scans a project directory and reports file counts, line counts, and size by language. Recognizes 20+ languages, skips common non-source directories (node_modules, target, .git, etc.).
# Clone and build
git clone https://github.com/ctonneslan/devflow-cli.git
cd devflow-cli
cargo build --release
# Binary is at target/release/devflow-cli
# Optionally copy to PATH:
cp target/release/devflow-cli /usr/local/bin/devflow# Generate changelog from last 50 commits
devflow changelog
# Last 20 commits, only features
devflow changelog --count 20 --filter-type feat
# Since a specific date, as JSON
devflow changelog --since 2026-01-01 --format json# Analyze a log file
devflow logs --path /var/log/app.log
# Show only ERROR lines
devflow logs --path app.log --level error
# Top 5 most frequent errors, as JSON
devflow logs --path app.log --top 5 --format json# Current directory
devflow stats
# Specific directory, JSON output
devflow stats --dir ~/projects/my-app --format jsonProject Statistics
Total: 147 files, 12,430 lines, 892.3 KB
Scan time: 6 ms
Language Breakdown:
Language Files Lines Size %
────────────────────────────────────────────────────
TypeScript 48 5,210 180.2 KB 41.9% ████████████
Python 23 3,100 102.1 KB 24.9% ███████
Rust 12 2,340 89.4 KB 18.8% █████
Go 8 1,200 45.6 KB 9.7% ██
YAML 6 580 15.0 KB 4.7% █
| Component | Technology | Why |
|---|---|---|
| Language | Rust | Performance, safety, zero-cost abstractions |
| CLI parsing | clap 4 | Derive macros, automatic help generation |
| Regex | regex crate | Fast pattern matching for log parsing |
| Directory traversal | walkdir | Recursive iteration with filtering |
| Serialization | serde + serde_json | JSON output support |
| Terminal colors | colored | Cross-platform ANSI color output |
src/
├── main.rs # CLI argument parsing and command dispatch
├── changelog.rs # Git log parsing and changelog generation
├── logs.rs # Log file analysis and pattern detection
└── stats.rs # Project directory scanning and language detection
- Log analysis: 500K+ lines/second on standard hardware
- Project scan: Full Next.js project (20K files) in under 100ms
- Binary size: ~3MB release build
MIT