svm-js

Solidity Version Manager inspired by nvm & jabba. Speeds up Solidity compilation in Truffle projects and allows you to easily install & switch between different versions of the Solidity compiler (solc) from the Terminal.

svm-js is a re-implementation of svm in TypeScript. It is currently in beta and is unstable. It can be used from the command-line in the same way as svm, or included in Truffle projects in order to speed up the truffle compile command significantly by using native solc binaries compiled for your platform of choice, rather than the solcjs implementation.

Installation

Run npm install svm-js if you wish to use svm-js as a library, or npm install -g svm-js if you want to use svm-js from the commandline. Installing using the -g option will add a loader function for svm-js your bashrc/zshrc, allowing you to use the svm command globally. Note that this CLI functionality currently only works on Linux and macOS, with Windows support coming soon.

Usage with Truffle

In your truffle-config.js file, replace the replace the compiler version specifier with useNativeSolidity("<compiler version>"). This will invoke svm-js, which will automatically download and use the correct native compiler version, and add it to the PATH variable for the running Node process, allowing Truffle to use it. Example usage:

const { useNativeSolidity } = require("svm-js");

module.exports = {
  networks: {
      // networks
  },
  compilers: {
    solc: {
      version: useNativeSolidity("0.6.12"),    
    }
  }
}

Usage with your shell

svm-js integrates with your shell and provides an svm command. The usage is identical to that of svm.

Executables

Executables used by svm are downloaded using TLS, and are served directly from the Solidity Github releases page for Windows and Linux. Unfortunately native images are not supplied for earlier solc versions on macOS, so they are downloaded from this repository.

Notes:

svm-js should be compatible with Node versions 10+. It also exposes useful functionality to download arbitary versions of Solidity when used as a library, beyond just the useNativeSolidity command. Using svm-js in Hardhat projects is not needed, as it already downloads & uses native solc binaries.