Method execute

packages/core/src/tools/read-file.ts:74–160

()

  }

  async execute(): Promise<ToolResult> {
    const result = await processSingleFileContent(
      this.params.absolute_path,
      this.config.getTargetDir(),
      this.params.offset,
      this.params.limit,
    );

    if (result.error) {
      // Map error messages to ToolErrorType
      let errorType: ToolErrorType;
      let llmContent: string;

      // Check error message patterns to determine error type
      if (
        result.error.includes('File not found') ||
        result.error.includes('does not exist') ||
        result.error.includes('ENOENT')
      ) {
        errorType = ToolErrorType.FILE_NOT_FOUND;
        llmContent =
          'Could not read file because no file was found at the specified path.';
      } else if (
        result.error.includes('is a directory') ||
        result.error.includes('EISDIR')
      ) {
        errorType = ToolErrorType.INVALID_TOOL_PARAMS;
        llmContent =
          'Could not read file because the provided path is a directory, not a file.';
      } else if (
        result.error.includes('too large') ||
        result.error.includes('File size exceeds')
      ) {
        errorType = ToolErrorType.FILE_TOO_LARGE;
        llmContent = `Could not read file. ${result.error}`;
      } else {
        // Other read errors map to READ_CONTENT_FAILURE
        errorType = ToolErrorType.READ_CONTENT_FAILURE;
        llmContent = `Could not read file. ${result.error}`;
      }

      return {
        llmContent,
        returnDisplay: result.returnDisplay || 'Error reading file',
        error: {
          message: result.error,
          type: errorType,
        },
      };
    }

    let llmContent: PartUnion;
    if (result.isTruncated) {
      const [start, end] = result.linesShown!;
      const total = result.originalLineCount!;
      const nextOffset = this.params.offset
        ? this.params.offset + end - start + 1
        : end;