justfile

name	justfile
description	Generate a justfile for the current project based on detected project type and deployment method.

Generate Justfile

Generate a justfile for this project with standard recipes based on the detected project type.

Instructions

1. Detect project type by checking for these files (in order):

   • mix.exs → Elixir/Phoenix
   • package.json → Node.js
   • pyproject.toml or requirements.txt → Python
   • go.mod → Go
   • Cargo.toml → Rust

2. Detect deployment method by checking for:

   • fly.toml → use fly deploy
   • Dockerfile with no fly.toml → use docker build placeholder
   • package.json with deploy script → use that script
   • deploy.sh → use ./deploy.sh
   • Otherwise → placeholder with TODO

3. Generate justfile with these recipes:

Project-Specific Commands

Elixir/Phoenix

# Start development server
up:
    mix phx.server

# Deploy to production
deploy:
    fly deploy

# Run tests
test:
    mix test

# Run quality checks
check:
    mix check

# Compile the project
build:
    mix compile

# Clean build artifacts
clean:
    mix clean
    rm -rf _build deps

Node.js

# Start development server
up:
    npm run dev

# Deploy to production
deploy:
    npm run deploy

# Run tests
test:
    npm test

# Run linting
check:
    npm run lint

# Build the project
build:
    npm run build

# Clean build artifacts
clean:
    rm -rf node_modules dist build .next

Python

# Start development server
up:
    python -m uvicorn main:app --reload

# Deploy to production
deploy:
    # TODO: Configure deployment

# Run tests
test:
    pytest

# Run linting
check:
    ruff check .

# Build the project
build:
    pip install -e .

# Clean build artifacts
clean:
    rm -rf __pycache__ .pytest_cache .ruff_cache dist build *.egg-info

Go

# Start development server
up:
    go run .

# Deploy to production
deploy:
    # TODO: Configure deployment

# Run tests
test:
    go test ./...

# Run linting
check:
    go vet ./...

# Build the project
build:
    go build -o bin/app .

# Clean build artifacts
clean:
    rm -rf bin

Rust

# Start development server
up:
    cargo run

# Deploy to production
deploy:
    # TODO: Configure deployment

# Run tests
test:
    cargo test

# Run linting
check:
    cargo clippy

# Build the project
build:
    cargo build --release

# Clean build artifacts
clean:
    cargo clean

Additional Guidelines

• If fly.toml exists, always use fly deploy for the deploy recipe
• For Node.js, check package.json scripts and use the actual script names (e.g., dev, start, serve)
• For Phoenix projects, check if mix check alias exists in mix.exs; if not, use mix credo --strict
• Add a comment at the top of the justfile: # Project automation recipes
• If the project type cannot be determined, ask the user what type of project it is

Output

Write the justfile to the project root. If a justfile already exists, ask before overwriting.