Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | 1x 1x 1x 1x 1x 1x 4x 4x 4x 4x 4x 4x 1x 1x 4x 4x 4x 212x 212x 212x 9x 9x 212x 4x 4x 4x 1x 9x 9x 9x 9x 9x 9x 9x 9x | import * as escodegen from "escodegen";
import * as espree from "espree";
import * as estraverse from "estraverse";
import * as fs from "fs/promises";
export async function transpile(inputFile, outputFile) {
let input = await fs.readFile(inputFile, 'utf-8');
const output = addLogging(input);
if (outputFile === undefined) {
console.log(output);
return;
}
console.log(`Output in file: ${outputFile}`)
await fs.writeFile(outputFile, output);
}
export function addLogging(code) {
const ast = espree.parse(code, { ecmaVersion: 12, loc: true });
estraverse.traverse(ast, {
enter: function(node, parent) {
if (node.type === 'FunctionDeclaration' ||
node.type === 'FunctionExpression' ||
node.type === 'ArrowFunctionExpression') {
addBeforeCode(node);
}
}
});
return escodegen.generate(ast);
}
function addBeforeCode(node) {
const name = node.id ? node.id.name : '<anonymous function>';
const parameters = node.params.map(p => '${ ' + p.name + ' }').join(', ');
const line = node.loc.start.line;
const beforeCode = "console.log(`Entering " + name + `(` + parameters + ") at line " + line + "`);";
const beforeNodes = espree.parse(beforeCode, { ecmaVersion: 12}).body;
node.body.body = beforeNodes.concat(node.body.body);
}
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