feat: init

node_modules/youch-core/build/index.js

@@ -0,0 +1,316 @@
+// src/parser.ts
+import { fileURLToPath } from "url";
+import { readFile } from "fs/promises";
+import { Exception } from "@poppinss/exception";
+import { parse } from "error-stack-parser-es";
+
+// src/debug.ts
+import { debuglog } from "util";
+var debug_default = debuglog("youch:core");
+
+// src/source_file.ts
+var SourceFile = class {
+  #contents;
+  constructor(options) {
+    if ("contents" in options) {
+      this.#contents = options.contents;
+    }
+  }
+  /**
+   * Slice the file contents for the buffer size around a given
+   * line number.
+   *
+   * @example
+   * ```ts
+   * const chunks = sourceFile.slice(11, 7)
+   * // Here chunks will be an array of 7 items from line number
+   * // 8 to 14
+   * ```
+   */
+  slice(lineNumber, bufferSize) {
+    if (!this.#contents) {
+      return void 0;
+    }
+    const lines = this.#contents.split(/\n|\r\n/);
+    const contentSize = lines.length;
+    const chunkSize = Math.ceil((bufferSize - 1) / 2);
+    let startIndex = chunkSize >= lineNumber ? 0 : lineNumber - chunkSize - 1;
+    if (contentSize - lineNumber < chunkSize) {
+      startIndex = Math.max(startIndex - (chunkSize - (contentSize - lineNumber)), 0);
+    }
+    const sourceIndex = lineNumber - 1;
+    const startRemainder = startIndex - sourceIndex + chunkSize;
+    const endIndex = startRemainder + chunkSize + lineNumber;
+    debug_default("slicing file contents", {
+      startIndex,
+      endIndex,
+      sourceIndex,
+      contentSize,
+      bufferSize,
+      chunkSize
+    });
+    return lines.slice(startIndex, endIndex).map((chunk, index) => {
+      return {
+        chunk,
+        lineNumber: startIndex + index + 1
+      };
+    });
+  }
+};
+
+// src/parser.ts
+var ErrorParser = class _ErrorParser {
+  /**
+   * FS source loader reads the file contents from the filesystem
+   * for all non-native frames
+   */
+  static fsSourceLoader = async (frame) => {
+    if (!frame.fileName || frame.fileType !== "fs" || frame.type === "native") {
+      return void 0;
+    }
+    debug_default("reading contents for source file %s", frame.fileName);
+    try {
+      return {
+        contents: await readFile(frame.fileName, "utf-8")
+      };
+    } catch (error) {
+      debug_default(`Unable to read source file %s, error %s`, frame.fileName, error.message);
+    }
+  };
+  /**
+   * Native frames filename identifiers for Node.js and
+   * Deno
+   */
+  #nativeFramesIdentifiers = ["node:", "ext:"];
+  /**
+   * Native frames filename identifier for Bun. In case of
+   * bun, the filename exactly matches the keyword "native"
+   */
+  #bunNativeIdentifier = "native";
+  /**
+   * Cache of preloaded source files along with their absolute
+   * path
+   */
+  #sourceFiles = /* @__PURE__ */ new Map();
+  /**
+   * The offset can be used to skip initial frames from the
+   * error stack
+   */
+  #offset;
+  /**
+   * Custom source loader to consult for reading the sourcefile
+   * contents
+   */
+  #sourceLoader = _ErrorParser.fsSourceLoader;
+  /**
+   * Parsers are used to prepare the source value for parsing
+   */
+  #parsers = [];
+  /**
+   * Transformers are used to post process the parsed error and
+   * attach additional information to it.
+   */
+  #transformers = [];
+  constructor(options) {
+    options = options ?? {};
+    this.#offset = options.offset;
+  }
+  /**
+   * Normalizes the unknown error to be an Error
+   */
+  #normalizeError(source) {
+    if (source instanceof Error) {
+      return source;
+    }
+    if (typeof source === "object" && source && "message" in source && "stack" in source) {
+      return source;
+    }
+    const error = new Exception(JSON.stringify(source));
+    error.help = 'To get as much information as possible from your errors, make sure to throw Error objects. See <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error">https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error</a> for more information.';
+    return error;
+  }
+  /**
+   * Returns the source chunks for a given file and the
+   * line number.
+   */
+  async #getSource(frame) {
+    let sourceFile = this.#sourceFiles.get(frame.fileName);
+    if (sourceFile) {
+      debug_default("reading sourcefile from cache %s", frame.fileName);
+      return sourceFile.slice(frame.lineNumber ?? 1, 11);
+    }
+    const contents = await this.#sourceLoader(frame);
+    if (contents) {
+      sourceFile = new SourceFile(contents);
+      debug_default("caching sourcefile instance for %s", frame.fileName);
+      this.#sourceFiles.set(frame.fileName, sourceFile);
+      return sourceFile.slice(frame.lineNumber ?? 1, 11);
+    }
+  }
+  /**
+   * Syntax errors in JavaScript does not contain the source file
+   * location within the stack trace, since the error has
+   * happened in the language parser.
+   *
+   * However, Node.js includes the absolute path to the file within
+   * the stack trace contents as the first line. So we parse
+   * that out in this function.
+   */
+  #parseSyntaxError(error) {
+    const [sourceIdentifier] = error.stack?.split("\n") || [];
+    const tokens = sourceIdentifier.split(":");
+    const lineNumber = Number(tokens.pop());
+    const fileName = tokens.join(":");
+    if (fileName && !Number.isNaN(lineNumber)) {
+      return [
+        {
+          fileName,
+          lineNumber,
+          source: sourceIdentifier
+        }
+      ];
+    }
+    return [];
+  }
+  /**
+   * Applies the offset on the frames to skip certain frames
+   * from the start
+   */
+  #applyOffset(frames) {
+    if (this.#offset) {
+      return frames.slice(this.#offset);
+    }
+    return frames;
+  }
+  /**
+   * Replaces windows slash to unix slash
+   */
+  #toUnixSlash(fileName) {
+    const isExtendedLengthPath = fileName.startsWith("\\\\?\\");
+    return isExtendedLengthPath ? fileName : fileName.replace(/\\/g, "/");
+  }
+  /**
+   * Normalizes the filename to be a path with unix slash. The
+   * URL style paths are also converted to normalized file
+   * paths
+   */
+  #normalizeFileName(fileName) {
+    if (fileName.startsWith("file:")) {
+      return this.#toUnixSlash(fileURLToPath(fileName));
+    }
+    return this.#toUnixSlash(fileName);
+  }
+  /**
+   * Returns the type of the frame.
+   */
+  #getFrameType(fileName) {
+    return this.#nativeFramesIdentifiers.some((identifier) => fileName.includes(identifier)) || fileName === this.#bunNativeIdentifier ? "native" : fileName.includes("node_modules/") ? "module" : "app";
+  }
+  /**
+   * Returns the source type of the frame.
+   */
+  #getFrameSourceType(fileName) {
+    return fileName.startsWith("http://") ? "http" : fileName.startsWith("https://") ? "https" : "fs";
+  }
+  /**
+   * Enhances a frame to contain additional information
+   */
+  async #enhanceFrames(frames) {
+    let stackFrames = [];
+    for (const { source: raw, ...frame } of frames) {
+      const stackFrame = {
+        ...frame,
+        raw
+      };
+      if (!stackFrame.fileName) {
+        stackFrames.push(stackFrame);
+        continue;
+      }
+      stackFrame.fileName = this.#normalizeFileName(stackFrame.fileName);
+      stackFrame.type = this.#getFrameType(stackFrame.fileName);
+      stackFrame.fileType = this.#getFrameSourceType(stackFrame.fileName);
+      stackFrame.source = await this.#getSource(stackFrame);
+      debug_default("stack frame %O", stackFrame);
+      stackFrames.push(stackFrame);
+    }
+    return stackFrames;
+  }
+  /**
+   * Register a parser. Parsers are synchronous functions
+   * that can be used to pre-process the source value
+   * before it get parsed.
+   *
+   * @example
+   * ```ts
+   * sourceFile.useParser((source) => {
+   *   if (valueCanBeParsed) {
+   *     return newValue
+   *   }
+   *   return source
+   * })
+   * ```
+   */
+  useParser(parser) {
+    this.#parsers.push(parser);
+    return this;
+  }
+  /**
+   * Register a transformer. Transformers can be async functions
+   * to post-process the parsed error value.
+   *
+   * @example
+   * ```ts
+   * sourceFile.useTransformer((error, source) => {
+   *   // mutate "error" properties
+   * })
+   * ```
+   */
+  useTransformer(transformer) {
+    this.#transformers.push(transformer);
+    return this;
+  }
+  /**
+   * Define a custom source loader to load the contents of the
+   * source file within the error stack.
+   *
+   * For example: You might want to register a custom source loader
+   * that makes an fetch call to the server to read the source of
+   * the file within the error stack.
+   */
+  defineSourceLoader(loader) {
+    this.#sourceLoader = loader;
+    return this;
+  }
+  /**
+   * Parse an unknown value into a parsed error object.
+   */
+  async parse(source) {
+    debug_default("parsing source %O", source);
+    source = this.#parsers.reduce((result, parser) => {
+      result = parser(result);
+      return result;
+    }, source);
+    let error = this.#normalizeError(source);
+    debug_default("error normalized to %O", error);
+    let esFrames = error instanceof SyntaxError ? this.#parseSyntaxError(error) : [];
+    esFrames = esFrames.concat(parse(error, { allowEmpty: true }));
+    esFrames = this.#applyOffset(esFrames);
+    const parsedError = {
+      message: error.message,
+      name: error.name,
+      frames: await this.#enhanceFrames(esFrames),
+      hint: "hint" in error && error.hint ? String(error.hint) : "help" in error && error.help ? String(error.help) : void 0,
+      code: "code" in error ? String(error.code) : void 0,
+      cause: error.cause,
+      stack: error.stack,
+      raw: error
+    };
+    for (const transformer of this.#transformers) {
+      await transformer(parsedError, error);
+    }
+    return parsedError;
+  }
+};
+export {
+  ErrorParser
+};