langium-cli
Version:
CLI for Langium - the language engineering tool
44 lines • 1.86 kB
JavaScript
/******************************************************************************
* Copyright 2021 TypeFox GmbH
* This program and the accompanying materials are made available under the
* terms of the MIT License, which is available in the project root.
******************************************************************************/
import chalk from 'chalk';
import { AstUtils, GrammarAST, GrammarUtils, stream } from 'langium';
//eslint-disable-next-line @typescript-eslint/no-explicit-any
export function log(level, options, message, ...args) {
if (options.watch) {
console[level](getTime() + message, ...args);
}
else {
console[level](message, ...args);
}
}
export function getTime() {
const date = new Date();
return `[${chalk.gray(`${padZeroes(date.getHours())}:${padZeroes(date.getMinutes())}:${padZeroes(date.getSeconds())}`)}] `;
}
function padZeroes(i) {
return i.toString().padStart(2, '0');
}
export function collectKeywords(grammar) {
const keywords = new Set();
const reachableRules = GrammarUtils.getAllReachableRules(grammar, false);
for (const keyword of stream(reachableRules)
.filter(rule => GrammarAST.isParserRule(rule) || GrammarAST.isInfixRule(rule))
.flatMap(rule => AstUtils.streamAllContents(rule).filter(GrammarAST.isKeyword))) {
keywords.add(keyword.value);
}
return Array.from(keywords).sort();
}
export function collectTerminalRegexps(grammar) {
const result = {};
const reachableRules = GrammarUtils.getAllReachableRules(grammar, false);
for (const terminalRule of stream(reachableRules).filter(GrammarAST.isTerminalRule)) {
const name = terminalRule.name;
const regexp = GrammarUtils.terminalRegex(terminalRule);
result[name] = regexp;
}
return result;
}
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