firetree 🔥🌲

AST parser and generator for Firebase Firestore and Storage security rules

Project Status

Documentation

Full API documentation - Learn about each method

Why?

Firestore security rules lacks an available AST parser…. so I made one.

This can come in handy for making additional tools, like IDE plugins, security
rules analyzers or even a minifier

Features

• Parses firestore rules into an AST
• Generates rules from an AST

TODO

• Support stdin and stdout for the binary commands

Install

npm install --save-dev firetree

Usage

The firetree parser can be used as an imported library or as a binary.

Using Programmatically

To do so, simply
install firetree as a project dependency and then
import the necessary methods from the firetree package

npm install --save firetree

import { generate, parse, setupContext } from 'firetree'
const context = setupContext()
const ast = await parse(context, {
  filePath: './path/to/firestore.rules')
})
const rulesString = await generate(context, { ast })

Using the Binary

You can using the binary directly by installing globally

npm install -g firemin

To parse a rules file, use the parse command

firetree parse -f ./path/to/my-firestore.rules

By default the output file is ./firestore.ast.rules.json. To specify a different
path you can use the -o option.

firetree parse -f ./path/to/my-firestore.rules -o ./output/file/my-firestore.ast.rules.json

To generate a rules file from an AST, use the generate command

firetree generate -f ./path/to/my-firestore.ast.rules.json

By default the output file is ./firestore.rules. To specify a different
path you can use the -o option.

firetree generate -f ./path/to/my-firestore.ast.rules.json -o ./output/file/my-firestore.rules