Codelens

High performance code statistics tool written in Rust.

Features

• Fast: Parallel file traversal, 30-50x faster than Python alternatives
• 65+ Languages: Built-in support for popular programming languages
• Smart Filtering: Respects .gitignore, auto-excludes build directories
• Multiple Outputs: Console, JSON, CSV, Markdown, HTML with charts
• Complexity Analysis: Function count, cyclomatic complexity, nesting depth
• Extensible: Add custom languages via TOML configuration

Installation

Build from source:

git clone https://github.com/DropFan/codelens
cd codelens
cargo build --release

Usage

# Analyze current directory
codelens

# Analyze specific directories
codelens src tests

# Only count specific languages
codelens -l rust,go,python

# Output JSON
codelens -f json -O stats.json

# Output HTML report
codelens -f html -O report.html

# Show top 20 languages by code lines
codelens --top 20 --sort code

# Exclude directories
codelens --exclude vendor,dist,node_modules

# List supported languages
codelens --list-languages

Output Formats

Configuration

Create .codelens.toml in your project root:

# Exclude patterns
excludes = "*test*,*mock*"

# Target languages
lang = "rust,go,python"

# Output format
output = "json"

# Threading
threads = 8

# Depth limit
depth = 10

# Show git info
git_info = true

Custom Languages (Planned)

Note: This feature is planned but not yet implemented.

Custom language definitions will be supported in ~/.config/codelens/languages.toml:

[mylang]
name = "MyLang"
extensions = [".ml", ".mli"]
line_comments = ["#"]
block_comments = [["/*", "*/"]]
function_pattern = "^\\s*def\\s+\\w+"
complexity_keywords = ["if", "for", "while"]

Performance

Benchmarks on a large codebase (~100k files):

License

MIT