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7c709f0ffd
## What changed Add `codex-mermaid`, a standalone crate that renders supported subsets of flowchart, sequence, state, class, and ER diagrams as Unicode text. Expose `render` for plain text and `render_spans` for semantic node, edge, and text spans that callers can style. Enforce source, diagram, canvas, and display-width limits. Return errors for unsupported input or exceeded limits without producing partial diagrams, leaving source fallback to callers. Include documentation and a stdin rendering example. ## Testing Add snapshots for each diagram family, checks for relationship endpoints, Unicode labels, semantic spans, truncated input, and size limits, plus edge reconstruction for all 512 directed three-node graphs in all four layout directions. GitOrigin-RevId: 5b4e65d9152abce5d833e4e6b12113a5a21f700e
18 lines
487 B
Rust
18 lines
487 B
Rust
//! Render a diagram from standard input for manual prototype evaluation.
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use std::io::Read;
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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let mut source = String::new();
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std::io::stdin()
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.take(16 * 1024 + 1)
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.read_to_string(&mut source)?;
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let max_width = std::env::args()
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.nth(1)
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.map(|value| value.parse())
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.transpose()?
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.unwrap_or(120);
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println!("{}", codex_mermaid::render(&source, max_width)?);
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Ok(())
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}
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