eric scipleandCopilot
c85997ad0d
Add containerImageValidation experimental feature flag that gates the new container image validation behind an opt-in toggle. When the flag is off (default), the legacy converter logic is used. When enabled, the improved validation with expression handling runs. The legacy code is duplicated to keep code paths fully isolated and make the eventual cleanup diff minimal — just delete the legacy functions and the flag guards. Co-authored-by: Copilot <[email protected]>
actions/expressions
@actions/expressions is a library to parse and evaluate GitHub Actions expressions.
Installation
The package contains TypeScript types and compiled ECMAScript modules.
npm install @actions/expressions
Usage
Simple example
import { Parser, Lexer, Evaluator, data } from '@actions/expressions';
const lexer = new Lexer("1 == 2");
const lr = lexer.lex();
const parser = new Parser(lr.tokens, [], []);
const expr = parser.parse();
const evaluator = new Evaluator(expr, new data.Dictionary());
const result = evaluator.evaluate();
console.log(result.coerceString()) // false
With context data
import { Parser, Lexer, Evaluator, data } from '@actions/expressions';
const lexer = new Lexer("'monalisa' == context.name");
const lr = lexer.lex();
const parser = new Parser(lr.tokens, ["context"], []);
const expr = parser.parse();
const evaluator = new Evaluator(expr, new data.Dictionary([{
key: "context"
value: new data.Dictionary([{
key: "name"
value: new data.StringData("monalisa")
}])
}]));
const result = evaluator.evaluate();
console.log(result.coerceString()) // true
Contributing
See CONTRIBUTING.md at the root of the repository for general guidelines and recommendations.
This project is just one of multiple implementations of the GitHub Actions Expressions language. We therefore cannot accept contributions that add new language features or significantly change the behavior of existing language features. If you would like to propose a change to the language itself, please use our Community Forum.
If you do want to contribute, please run prettier to format your code and add unit tests as appropriate before submitting your PR. ./testdata contains test cases that all implementations should pass, please also make sure those tests are still passing.
Build
npm run build
or to watch for changes
npm run watch
Test
npm test
or to watch for changes and run tests:
npm run test-watch
Lint
npm run format-check
License
This project is licensed under the terms of the MIT open source license. Please refer to MIT for the full terms.