code-complexity/dist/src/lib/complexity/strategies/halstead.js

Measure the churn/complexity score. Higher values mean hotspots where refactorings should happen.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.calculate = void 0;
const utils_1 = require("../../../utils");
const node_path_1 = require("node:path");
const node_fs_1 = require("node:fs");
const core_1 = require("@babel/core");
// eslint-disable-next-line @typescript-eslint/no-var-requires
const escomplex = require("escomplex");
const internal = { debug: (0, utils_1.buildDebugger)("halstead") };
function calculate(path) {
    switch ((0, node_path_1.extname)(path)) {
        case ".ts":
            return fromTypeScript(path);
        case ".mjs":
        case ".js":
            return fromJavaScript(path);
        default:
            internal.debug("Unsupported file extension. Falling back on default complexity (1)");
            return new utils_1.UnsupportedExtension();
    }
}
exports.calculate = calculate;
function fromJavaScript(path) {
    const content = (0, node_fs_1.readFileSync)(path, { encoding: "utf8" });
    const babelResult = (0, core_1.transformSync)(content, {
        presets: ["@babel/preset-env"],
    });
    if (!babelResult)
        throw new Error(`Error while parsing file ${path}`);
    const result = escomplex.analyse(babelResult.code, {});
    return result.aggregate.halstead.volume;
}
function fromTypeScript(path) {
    const content = (0, node_fs_1.readFileSync)(path, { encoding: "utf8" });
    const babelResult = (0, core_1.transformSync)(content, {
        plugins: ["@babel/plugin-transform-typescript"],
        presets: ["@babel/preset-env"],
    });
    if (!babelResult)
        throw new Error(`Error while parsing file ${path}`);
    const result = escomplex.analyse(babelResult.code);
    return result.aggregate.halstead.volume;
}