1.5.2 • Published 2 years ago
@balena/transformer-runtime v1.5.2
ProductOS Transformer Runtime Package
This package encodes the basic rules for running transformers. This package allows you to obtain the minimal functionality to run a transformer by providing input, artifact, and output targets.
Example Usage
Run a transformer of image example-image:latest
which has been pulled before:
import TransformerRuntime from '../src';
import * as yaml from 'js-yaml';
import * as fs from 'fs';
import * as path from 'path';
import { Contract } from '@balena/jellyfish-types/build/core';
import testTransformer from './test-transformer';
const runtime = new TransformerRuntime();
const img = 'example-image';
const version = 'latest';
const artifactDir = path.join(__dirname, 'artifactDir');
const workingDir = path.join(__dirname, 'in');
const transformerImage = `${img}:${version}`;
const outputDir = path.join(__dirname, 'out');
const runPrivileged = true;
const content = fs
.readFileSync(path.join(artifactDir, '/balena.yml'))
.toString();
const contract = yaml.load(content) as Contract;
async function main() {
const result = await runtime.runTransformer(
artifactDir,
contract,
testTransformer,
transformerImage,
workingDir,
outputDir,
runPrivileged
);
}
main().catch(err => {
console.log("error executing your transformer:", err);
process.exit(1);
});
Create your own transformer
You can follow the tutorial here to create your own transformer
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