58 lines
1.8 KiB
JavaScript
58 lines
1.8 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.inferLabel = void 0;
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const fs = require("fs");
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const is_valid_identifier_1 = require("./is-valid-identifier");
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const is_node_1 = require("./node/is-node");
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// Regex to extract the label out of the `ow` function call
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const labelRegex = /^.*?\((?<label>.*?)[,)]/;
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/**
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Infer the label of the caller.
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@hidden
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@param callsites - List of stack frames.
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*/
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const inferLabel = (callsites) => {
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var _a;
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if (!is_node_1.default) {
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// Exit if we are not running in a Node.js environment
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return;
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}
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// Grab the stackframe with the `ow` function call
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const functionCallStackFrame = callsites[1];
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if (!functionCallStackFrame) {
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return;
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}
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const fileName = functionCallStackFrame.getFileName();
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const lineNumber = functionCallStackFrame.getLineNumber();
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const columnNumber = functionCallStackFrame.getColumnNumber();
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if (fileName === null || lineNumber === null || columnNumber === null) {
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return;
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}
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let content = [];
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try {
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content = fs.readFileSync(fileName, 'utf8').split('\n');
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}
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catch {
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return;
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}
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let line = content[lineNumber - 1];
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if (!line) {
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// Exit if the line number couldn't be found
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return;
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}
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line = line.slice(columnNumber - 1);
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const match = labelRegex.exec(line);
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if (!((_a = match === null || match === void 0 ? void 0 : match.groups) === null || _a === void 0 ? void 0 : _a.label)) {
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// Exit if we didn't find a label
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return;
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}
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const token = match.groups.label;
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if (is_valid_identifier_1.default(token) || is_valid_identifier_1.default(token.split('.').pop())) {
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return token;
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}
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return;
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};
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exports.inferLabel = inferLabel;
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