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node_modules/ow/dist/utils/infer-label.js

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