pack_create

A Rust CLI tool that generates random 14-card booster packs from a user-defined Magic: The Gathering cube.

Features

• Reads a cube from a CSV file with card name, number, rarity, and type
• Generates packs following a configurable draft format (14 slots)
• Duplicate prevention across all slots in a pack
• Variant rolls (foil and alt-art) with configurable probabilities
• Rarity-weighted draws for land and mythic slots

Building

cargo build --release

The release profile is optimized for small binary size (opt-level = "z" with LTO).

Usage

./target/release/pack_create --path path/to/cube.csv

or

./target/release/pack_create -p path/to/cube.csv

CSV Input Format

The input file must contain the following columns:

Column	Description	Example
Card #	Unique integer identifier for the card	1001
Card Name	Name of the card	Lightning Bolt
Card Rarity	One of: Basic, Common, Uncommon, Rare, Mythic	Rare
Card Type	Land or empty for non-land cards	Land

Pack Layout (14 Slots)

Slot	Draw	Probability
1–7	Common	—
8–10	Uncommon	—
11	Any card (wildcard)	—
12	Rare or Mythic	87.5% Rare / 12.5% Mythic
13	Land	50% Common / 44% Basic / 6% Rare
14	Any card (foil guaranteed)	—

Variant Rolls

• Slots 1–13: Independent 1.5% foil and 1.5% alt-art rolls per card
• Slot 14: 100% foil, plus an independent 1.5% alt-art roll

Output

One line per slot showing the variant tags and card details:

Slot 1: [ ] [Card Number: 42, Name: Stone Wall, Rarity: (Common), Base: Unknown]
Slot 2: [Foil ] [Card Number: 105, Name: Elven Archer, Rarity: (Common), Base: Unknown]
...
Slot 14: [Foil Alt-Art ] [Card Number: 203, Name: Fireball, Rarity: (Rare), Base: Unknown]

In debug builds, additional diagnostic output is printed including per-rarity card counts and the slot 13 land roll.

Technical Details

• Rust edition: 2024
• Dependencies: clap (CLI parsing), csv (input parsing), rand (random draws), serde (deserialization)
• Cards are stored using Rc<Card> for efficient sharing across draw operations
• An exclusion list tracks drawn cards to prevent duplicates within a single pack

Roadmap

• Implement the 1.5% "Special Guest" card roll for slot 7
• Add fallback for slot 13 when no basic lands exist in the cube
• Implement slot 15 (token/art card/play aide)
• Seeded pack generation for reproducibility
• Improved error reporting with specific row/card details
• Web interface

License

See Cargo.toml for package metadata.