Synapse is a toolchain for building and deploying TypeScript applications, from CLI tools to full-stack apps. Your application's infrastructure is defined within the application itself.
Features:
- Multi-stage programming - run code at build time to create exactly what you need
- Cloud agnostic libraries - write once, deploy anywhere, including locally
- Automatic permissions solver - least privilege permissions via symbol execution
- Native modules - write modules using Zig with automatic TypeScript bindings (coming soon)
- Everything you need, built-in
- TypeScript compiler and bundler
- Incremental builds (distributed caching coming soon)
- Extremely fast package manager
- Node.js compatible JavaScript runtime
- A testing framework
import { Bucket } from 'synapse:srl/storage'
const bucket = new Bucket()
export async function main() {
await bucket.put('hello', 'world!')
console.log(await bucket.get('hello', 'utf-8'))
}One way to think about Synapse is to imagine a "metaprogram" that controls what code is executed and where it is executed. Synapse enables you to write code describing this metaprogram within traditional code.
The basic idea is that your code is executed at build time to generate instructions for your metaprogram. An instruction is best thought of as an individual goal state. For example, writing new Bucket() describes an instruction that creates a bucket if it does not already exist. Most instructions exist as configuration for resources. The remaining instructions are purely computational.
A "resource" is essentially anything that can be configured and persisted at build time. The idea of resources is deeply integrated into Synapse, meaning you can find them in many places:
- Classes exported by
synapse:srl/*modules - Generated "provider" classes
- User-defined custom resources
- Utility functions/classes in
synapse:lib(most notably,Bundle)
synapse deploy executes (or applies) your metaprogram, creating or updating a deployment. Deployments are the side-effects of instructions and their resulting state. Note that resources are effectively "frozen" outside of synapse deploy. Trying to create/update resources at runtime using Synapse APIs will fail.
These commands download and execute a script that will:
- Download a release compatible with your system
- Extract to
~/.synapse - Add
synapseto your PATH
curl -fsSL https://synap.sh/install | bashirm https://synap.sh/install.ps1 | iexSee Quick Start for basic instructions.
For help with specific features:
The core functionality of Synapse is built on top of several amazing projects:
And it wouldn't have been possible to create Synapse without them and their contributors!
Each cloud target also uses their respective SDK + Terraform provider. The AWS target uses:
A few things were also inspired by Bun. Most notably is the usage of Zig.