eric scipleandGitHub
656a821a94
Migrate expressions, workflow-parser, and languageservice packages to use proper ESM imports with .js extensions that work with node16 moduleResolution. Changes: - Update tsconfig.build.json in each package to use module: node16 and moduleResolution: node16 - Add .js extensions to all relative import paths (Option B approach) - Fix yaml internal type imports in workflow-parser by defining local types - Add skipLibCheck to handle @types/node compatibility issues - Add TypeScript 5.8.3 override in root package.json - Add ESM migration plan documentation The languageserver package is deferred due to test hang issues that need further investigation. Related #154 - Upgrade moduleResolution from node to node16 or nodenext Related #110 - Published ESM code has imports without file extensions Related #64 - expressions: ERR_MODULE_NOT_FOUND attempting to run example Related #146 - Can not import @actions/workflow-parser Test results: - expressions: 1068 tests passed - workflow-parser: 292 tests passed - languageservice: 452 tests passed * docs: update ESM migration plan with findings - Update languageserver blocker: vscode-languageserver v8.0.2 lacks ESM exports (not a test hang issue) - Document that Option B (manual .js extensions) was chosen over Option A due to ts-jest compatibility issues - Add workaround for yaml package internal types (LinePos, NodeBase) - Update migration status table with accurate reason for deferral - Add skipLibCheck note for @types/node compatibility
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.