$ show emicklei/dot
The dot package is a Go library for generating Graphviz DOT language graphs. It provides a fluent API to construct graphs, nodes, edges, and set attributes. The library supports features like subgraphs, clusters, record-shaped nodes, bidirectional edges, and Mermaid diagram output. It includes an extension package (dotx) for creating hierarchical graph composites. The code is well-structured, thoroughly tested, and has zero external dependencies beyond the Go standard library.
The LLM identified 4 files worth highlighting for reuse:
Defines AttributesMap and special types (HTML, Literal) for handling graph attributes. Provides methods to set, get, and delete attributes, supporting multiple values and special value types without escaping. This component is self-contained and reusable in any project needing attribute handling with special value types.
Implements IndentWriter for generating indented text output. Manages indentation levels and writes tabs appropriately. This is a generic utility that can be extracted and used in any text generation scenario requiring indentation.
Implements a recordBuilder for constructing Graphviz record-shaped node labels with fields and ports. Supports nested labels and fluent API for building complex label structures. Demonstrates the builder pattern for creating nested, structured strings.
Provides the Composite type for creating hierarchical graph components. Allows defining a composite as either a cluster within the parent graph or an external graph. Handles wiring of inputs and outputs between composites and the parent graph. Embodies the composite pattern for graph abstractions.